Front Cover
 Table of Contents
 UF Teacher/Scholar Award
 American Physical Society
 News in Research
 Columbia shuttle accident...
 Awards and recognition
 Undergraduate Physics newsletter...
 Sampling of recent faculty...
 Undergraduate honors
 Outreach program
 Celebrating our recent PhD...
 Back Cover

Group Title: Florida physics news
Title: Florida physics news ; vol. 3
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF00086456/00002
 Material Information
Title: Florida physics news ; vol. 3
Series Title: Florida physics news
Physical Description: Serial
Language: English
Creator: University of Florida Department of Physics
Publisher: University of Florida Department of Physics
Publication Date: 2005
 Record Information
Bibliographic ID: UF00086456
Volume ID: VID00002
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.


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Table of Contents
    Front Cover
        Page 1
    Table of Contents
        Page 2
    UF Teacher/Scholar Award
        Page 3
        Page 4
    American Physical Society
        Page 5
    News in Research
        Page 6
    Columbia shuttle accident investigation
        Page 7
    Awards and recognition
        Page 8
    Undergraduate Physics newsletter - in review
        Page 10
        Page 11
        Page 12
        Page 13
    Sampling of recent faculty publications
        Page 14
        Page 15
    Undergraduate honors
        Page 16
    Outreach program
        Page 17
    Celebrating our recent PhD graduates
        Page 18
        Page 19
    Back Cover
        Page 20
Full Text

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........... .... ....



November 2005 marks the third anniversary of
my term as department chair, and I can say that the
past year has been the most exciting one ("exciting"
in the sense of the ancient Chinese curse, "May you
live in exciting times"). Two significant events come to
mind: the record 2004 hurricane season, and the July
2004 implementation of the new Enterprise Resource
Planning software from PeopleSoft, designed to
manage UF's financial, payroll, and human resources
activities. As you know, Florida was hammered
by four hurricanes during last year's season, and
Hurricanes Frances and Jeanne directly hit Gainesville
in September 2004. Although ultimately the damage to
UF was minimal, with downed trees, power outages,
and minor flooding, it was nonetheless a stressful time
for the many faculty, staff, and students who were
affected by the storms. While last year's storm season is
little more than a bad memory, we wish the same could
be said for the PeopleSoft system, which can charitably
be described as "challenging"; our staff continue the
long ascent up the PeopleSoft learning curve, and we
hope we reach the summit soon.
Weather and administrivia aside, the past year has
been a good one for the department, with successes
in faculty recruiting, and recognition of many of our
faculty, staff, and students. On the recruiting front,
we continue to build in our new area of experimental
particle astrophysics with the hiring of Dr. Tarek Saab,
who joins the department as an Assistant Professor
in August 2005. Dr. Saab is a research scientist at
the NASA Goddard Space Flight Center where he is
part of a team developing x-ray detectors for NASA's
continue >


Physics Professor Paul Avery has
been named the 2005 Teacher/Scholar
of the Year, the highest faculty honor
bestowed by the University of Florida.
The award is given annually to a pro-
fessor who demonstrates excellence
in both teaching and scholarly activ-
ity and exhibits visibility within and
beyond the university.
Avery has served the university for
20 years and is a world-recognized
scholar for his fundamental contribu-
tions to high energy physics. He has
published more than 390 refereed
publications and supervised 23 PhD
students, postdoctoral associates and
scientists while maintaining consistent
extramural funding. He is the director
of two National Science Foundation

projects, the I- -
Grid Phys- i
ics Network,
known as
GriPhyN, and
the Interna-
tional Virtual
Data Grid
Avery also
collaborates on two major experi-
ments, CLEO, based at Cornell Uni-
versity, and CMS, in Geneva's CERN
laboratory. His research is in elemen-
tary particle physics, also called high
energy physics, which studies the
basic particles and the forces between
them that together determine the
underlying structure of the universe.

Avery teaches "Physics 2 with Calcu-
lus" and was recently named a fellow
of the American Physical Society.
"I am pleased and honored at
being selected for this award," Avery
says. "I have benefited throughout my
career from the strong support of my
colleagues and the administration at
the University of Florida. I appreci-
ate the collegial environment within
the Department of Physics and the
ease in forming collaborative projects
with members of other departments
and colleges. These interpersonal rela-
tions, more than anything else, have
made my working life so enjoyable
source: CLAS News and Publications

continue Chair's Corner

Constellation-X space mission. At
UF he plans to develop a program in
dark matter searches that will nicely
complement the ongoing work of Prof.
Laura Baudis. We have also made a
significant step in the development
of our biological physics program
with the hiring of Dr. Aneta Petkova,
who also starts in August 2005 as an
Assistant Professor. Dr. Petkova is a
postdoctoral associate at the National
Institutes of Health's Laboratory of
Chemical Physics, where she uses
solid-state nuclear magnetic resonance
techniques to study the structure of the
proteins that play an important role
in Alzheimer's disease. She plans to
continue this research at UF, where she
has potential collaborators both within
the department and at UF's McKnight
Brain Institute. Professors Jim Dufty
and Sam Trickey retired in June 2005,
after 35 and 37 years of service to
the university, respectively. We fully
expect to see Jim and Sam around the
department for many years to come,
and we plan to continue to seek their

advice (and good company) in the
coming years. Our faculty continue
to garner awards: Profs. Avery and
Hirschfeld have been elected Fellows
of the American Physical Society and
Prof. Avery was selected the campus-
wide UF Teacher/Scholar of the Year.
Our undergraduate physics majors
program is doing well with 150 physics
majors, and our Society of Physics
Students has been recognized as one
of the most active chapters in the
country. Finally, I'm pleased to report
that our graduate program continues
to thrive, with approximately 130
students enrolled in the PhD program
and 23 PhD degrees awarded over the
2004/2005 academic year. You can find
out more about faculty, student, and
staff news by reading further in this
UF President J. Bernard ("Bernie")
Machen is settling into his second
year as President, with his official
inauguration on September 10, 2004
(just days after Hurricane Frances
hit Gainesville). President Machen
has recently selected a new Provost

and Senior Vice President, Dr. Janie
Foukes, a biomedical engineer by
training and the current Dean of the
College of Engineering at Michigan
State University. Dr. Foukes arrives in
August 2005 and as Provost she will
serve as the university's chief academic
officer. We look forward to working
with Dr. Foukes as we continue to
advance the academic reputation of
our department and university.
On the finance front, the university's
budgets look healthy for the coming
year and include respectable raises
for the faculty and staff; this is due
to a strong state economy as well as
the lobbying efforts of the university
administration. Healthy budgets
should allow us to continue to
aggressively recruit and hire new
faculty for our new research initiatives
of experimental particle astrophysics
and biological physics, while at the
same time strengthening our core
areas-condensed matter physics,
high energy physics, theoretical
astrophysics, and chemical physics.

continue p 4

University ofFlorida Department of Physics 3

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Lasers offer unique capabilities
for both probing and manipulating
physical systems. On one hand, con-
tinuously emitting lasers offer unprec-
edented wavelength stability for use in
interferometric and metrology applica-
tions. On the other hand, pulsed laser
sources allow for the measurement of
dynamical events on time scales of a
femtosecond (=10-15 s) or less.
These characteristics form the basis
for the two major research themes in
our group. The major focus of the ultra-
fast optics group is to probe and control
dynamical laser-matter interactions on
femtosecond time scales. Femtosec-
ond laser pulses offer unprecedented
temporal resolution for observing the
dynamics of atoms, molecules, and sol-
id-state systems. By 'kicking' (exciting)
a system with a short laser pulse and
monitoring the relaxation of the system
back to its original state, we can follow
the dynamical evolution of the system,
be it the motion of electrons in semi-
conductors or the motion of atoms as
they dissociate in chemical reactions.
Through technological advances in
lasers and 'pulse-sculpting' technolo-
gies, it is now possible to go further
and guide the motion of an atom, mol-
ecule, or solid. Light
naturally interacts
with atoms, and
by controlling the

Graduate students Vidya
Ramanathan (right) and
Jinho Lee align and tune
up the cryogenic fem-
tosecond chirped pulse
amplifier. This laser
system produces pulses
which are 70 femtosec-
onds in duration and
have peak intensities of as
much as 1017 W/cm2.

source: Dr. David Reitze

timing of the interaction through the
structure and wavelength of the pulse,
we can 'steer' the interaction and thus
the evolution of the system. Adaptive
(or learning) control takes this even
one step further and directly interfaces
atomic, molecular, and solid state sys-
tems with computer-based learning
algorithms through the use of tempo-
rally sculpted laser pulses as short as
a few femtoseconds to teach the sys-
tem to evolve to a desired final state,
much in the same way as a computer
guides the motion of an airplane. This
work has wide applications in physics
and chemistry as well as optical engi-
neering. We have performed control
experiments to turn on and off the
coherent motion of atoms (phonons) in
solid on picosecond time scales [1], to
dramatically enhance the rate at which
laser-induced ionization takes place in
molecular nitrogen [2], and to control
the shape of femtosecond optical puls-
es in novel 'photonic crystal' fibers [3].
The major focus of the UF gravita-
tional wave physics group is to develop
instrumentation to probe the dynamic
structure of space-time (gravitational
waves). We are a collaboration part-
ner of the Laser Interferometer Gravi-

UF research scientist Malik Rakhmanov assembles a Brewster polarizer on a laminar
flow bench for installation into the LIGO Hanford 2 km long interferometer. Many
of the optical components of the interferometer are located in a high vacuum system
placing stringent requirements on cleanliness.

national Wave Observatory (LIGO).
LIGO, one of the largest projects ever
undertaken by the National Science
Foundation, has as its goal the detec-
tion and study of gravitational waves
from large-scale astrophysical sources.
Gravitational waves were predicted
by Einstein almost 90 years ago but
never been observed directly despite
a number of experiments over the last
40 years. The astrophysical motivation
for detecting gravitational waves is
compelling. Unlike the visible sky, the
gravitational wave 'sky' is completely
unexplored. For example, mergers
of neutron stars and black holes give
insight into strong-field gravity and
provide a unique experimental test of
general relativity. Observations of pul-
sar gravitational waves have already

allowed us to probe their
hydrodynamics and ellip-
ticities [4].
Gravitational waves are
miniscule strains applied
to space-time by motion
of massive astrophysical
objects possessing time-
dependent quadropole
mass moments. A passing gravitational
wave will differentially expand and
contract the distance between two mir-
rors ('test masses') in the arms of an
interferometer. Direct observation of
gravitational waves presents a formi-
dable challenge, because the magnitude
of the dynamic strain is expected to be
less than 10-22. LIGO consists of three
separate interferometers, two located
in Hanford, WA (one 4 kilometers long
and one 2 kilometers long) and one in
Livingston, LA (4 kilometers long) [5].
The UF LIGO group was one of three
institutions along with the California
Institute of Technology and the Mas-
sachusetts Institute of Technology to
design and build the LIGO detectors.
A variety of experimental programs

are currently underway at UF, incud-
ing the design of next generation large
scale gravitational wave interferome-
ters for the Laser Interferometer Gravi-
tational Wave Observatory, investiga-
tions of high power laser interactions
with optical components, and the
development of advanced interferom-
eter topologies for improved sensitiv-
ity. This work is carried out in collabo-
ration with the Tanner group and the
Mueller group.
[1] A. Rundquist, A. Efimov, and D. H. Reitze,
"Rapid mask synthesis using the Gerchberg-
Saxton algorithm for femtosecond pulse shaping"
J. Opt. Soc. B19, 2468-2478 (2002).
[2] A. Efimov, M. D. Moores, N. M. Beach, J. L.
Krause, and D. H. Reitze "Adaptive Control of
Pulse Phase In A Chirped Pulse Amplifier", Opt.
Lett. 23, 1915-1917 (1998).
[3] Shengbo Xu, D. H. Reitze, and R. L.
Windeler, "Controlling nonlinear processes in
microstructured fibers using shaped pulses",
Opt. Express 12,4731-4741 (2004).
[4] B. Abbott, et al. (LIGO Science Collaboration),
"Limits on Gravitational-Wave Emission from
Selected Pulsars Using LIGO Data, Phys. Rev.
Lett. 94, 181103 (2005).
[5] B. Abbott, et al. (LIGO Science Collaboration),
"Detector Description and Performance for the
First Coincidence Observations between LIGO
and GEO", Nuc. Instr. Meth. A 517, 154-179


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source: Dr. Arthur F Hebard

Like zoologists in the life sciences, the carriers are "holes". A hole is
physical scientists have a tendency to equivalent to an electron vacancy in
dassify and order things in hierarchies. the electron fluid. Metals have low
The Periodic Table of Elements is a resistance because the concentration
perfect playground for this type of of mobile charge carriers (electrons
activity. The elements can be ordered or holes) is high and the amount of
using a large number of schemes. scattering is small. A metal like copper
These include ranking by atomic has a low resistance and is widely
number, chemical reactivity, density, used in applications such
melting point, crystal structure, as power lines and
thermal conductivity, etc. One computers where
particular scheme that is of interest t% minimum heating
physicists is the ordering of elements is a prerequisite.
or combinations of elements by A metal like
electrical resistance. Metal, tungsten
(M) with low resistance are h a s
at the bottom, semimetals
(SM) and semiconductors
(SC) with intermediate
resistance are in the
Resistance hierarchy showing the ordered placement
middle, and insulators () of metals (M), the semimetals bismuth and graphite(SM),
with high resistance are at semiconductors(SC) and insulators(I). The samples used in the
the top (see Figure). cited study were cut from high purity crystalline specimens of bis-
Electrical resistance muth (large piece) and graphite (small piece) shown in the picture.
is a measure of a material's ability
to conduct a charge current in the both a higher resistance and a higher
presence of interactions (scattering) melting point and is used as a filament
of the charge carriers with themselves in light bulbs because it can be heated
or with the ions of the host material, with a current to a high temperature
Interestingly, the charge can be of where it glows but does not melt.
either sign: negative when the carriers Semiconductors such as silicon
are electrons and positive when and germanium occupy the middle

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stage of the resistance hierarchy. By
carefully introducing small amounts
of impurities, semiconductors can be
coaxed into being either an electron or
a hole conductor. Semiconductors are
the fundamental building blocks of the
electronic gadgetry that surrounds us
in our daily lives. Insulators have very
high resistance and are at the top of
the resistance hierarchy. Diamond, an
allotrope of carbon, is a good example.
In an insulator the charge carriers are
fixed in place and thus cannot move as
they do in a metal or a semiconductor.
If the temperature is lowered to zero

degrees on the absolute scale, a place
where all thermal motion ceases, then
all semiconductors become insulators
with infinite resistance. For metals,
lowering the temperature causes
the resistance to decrease toward a
value that depends on the number of
impurities and defects in the metal.
Most hierarchies have special
niches for renegade members, and the
resistance hierarchy is no exception.
In this regard, the elemental materials
bismuth and graphite distinguish
themselves as "semimetals" (SM)
and occupy a small niche between
metals (M) and semiconductors (SC).
Semimetals have unusual properties:


A public colloquium given by Dr. Douglas
D. Osheroff on February 22, 2005 focused
on his time as one of the board members
on the Columbia Accident Investigation
Board (CAIB). He engaged the packed
audience, full of undergraduate and
graduate students, faculty from across
campus, and even the local media, in
the 1001 New Physics Building Auditorium,
who were treated to an in-depth look at the
The Space Shuttle Columbia accident
occurred on February 1, 2003 over East
Texas at 0900 EST. All seven crew members
were killed. Debris from the accident was
scattered over 9,000 kilometers and only
40,000 pieces of the craft were recovered
during the investigation. He explained
how each piece of debris was taken to a
hanger and laid out on a grid to visualize
where each piece belonged in reference
to the actual shuttle. They found that the
left wing had virtually no recoverable parts,
indicating that it was the part of the craft
that sustained the most damage and the
probable cause of the accident. As time
went on, the team began to focus on a
piece of insulating foam that struck the left
wing on take-off and damaged one of the
thermal panels, specifically RCC panel

namely (1) perfect compensation,
which imposes an exact equality in
the number of free electrons and
holes, and (2) low scattering, which
implies that the distance an electron
or hole can travel without scattering
is long. In ultra pure bismuth at low
temperatures this distance can be as
long as 1 mm, an enormous distance
compared to the -10-7 mm between two
adjacent bismuth atoms. The renegade
behavior of bismuth and graphite
manifests itself in the temperature
and magnetic field dependence of
the resistance. In zero magnetic
fields the temperature dependence
of the resistance is similar to that of
a metal; the resistance decreases with
decreasing temperature. However
if a magnetic field is present, then in
sufficiently high fields the resistance
can increase by as much as a factor
of 100,000. Magnetic effects in metals
and semiconductors are miniscule in

8, located close to the base of the wing,
and was the only panel that was partially
recovered on the ground. After convincing
NASA to allow a ballistics test on an existing
panel, they were able to prove that this was
the problem. The outcome of the findings
concluded that NASA needed to take a
more in-depth look at how they handle
the safety issues of the shuttles which
were being overlooked due to NASAs
focus on cost and schedule issues. The
board recommended that NASA needed
to restructure how it deals with the safety
and maintenance of the fleet, and that
they needed to take back control of the
process instead of leaving it up to outside
Dr. Osheroff was chosen to
participate on the CAIB due to his
background. In 1996, he received
the Nobel Prize in Physics which he
shared with two colleagues from
Cornell University for their discovery
of superfluidity in helium-3. Dr.
Osheroff received his BS from
CalTech and PhD from Cornell
University, he is the G. Jackson
and C.J. Wood Professor of Physics
and Applied Physics at Stanford
University and was a member of

This unconventional looking
behavior of bismuth and graphite
has attracted considerable attention
and controversial speculation.
"Metal-insulator transitions",
"excitonic insulators" and "field-
induced superconductivity" typify
the descriptive terminology that
has appeared in the lexicon of
explanations. Experimentalists Arthur
Hebard and student, Xu Du, have
joined in a collaborative venture
with theorists Dmitrii Maslov and
postdoc, Shan-Wen Tsai, to research
the putative claims for bismuth and
graphite. They excised small samples
of bismuth and graphite from ultra
pure stock [see Figure] and performed
detailed measurements and analysis
of the dependence of resistance on
temperature and magnetic field. Some
of these studies were performed at
the National High Magnetic Field
Lab (NHMFL) in Tallahassee. Their
recently published results [1] took into


the technical staff at the Department of
Solid State and Low Temperature Research
at Bell Laboratories in the 1970s.
The Nobel Prize caps a long list of awards
Osheroff has received. He is a member of
the National Academy of Sciences, and
won the Simon Memorial Prize, the Oliver
Buckley Prize, and was named a MacArthur
Fellow. Osheroff also won a Walter J. Gores
Award for Excellence in Teaching.

Reconstruction Team members discuss debris with CAIB
board member Dr. Douglas D. (' '2nd from right)

account the simultaneous presence
of an equal number of electrons
and holes in very pure systems and
came to the unexpected conclusion
that 'traditional models' explain
well the 'unconventional looking
behavior'. The implicit story line is
that unconventional behavior attracts
a following, generates disparate
and often incorrect interpretations,
and finally elicits a resolution that is
accessible and visible to the whole
scientific community. Graphite and
bismuth might look and behave
differently but in reality have
established an identity that is no more
special than the identities of other
diverse occupants of the Periodic

[1] "Metal-Insulator-Like Behavior in
Semimetallic Bismuth and Graphite", Xu
Du, Shan-Wen Tsai, Dmitrii L. Maslov, and
Arthur F. Hebard, Physical Review Letters
94, 166601 (2005).

University ofFlorida Department of Physics 7

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Dr. Lisa Everett, a
postdoctoral research
associate, has been awarded
a 2005 Women in Science
Fellowship from L'Oreal
USA. She was one of five
young women from across the
nation selected from all areas
of physical and biological
sciences, each receives a
$20,000 fellowship. The
U.S. program, in its second
year, is part of a broader ti -
global initiative on the part
of the L'Oreal Corporation PC u D h awd
PThh ." Dr.R EveSeh ola presented prvih he auefd
to support women in science at both foutseani PnAg1 CEOo L'OdSA
the faculty and postdoctoral level.
Dr. Everett was honored at a special ceremony on April 12, at the American
Museum of Natural History in New York City. This fellowship is designed to
support her work with her scientific mentor, Dr. Pierre Ramond, with whom she
is conducting research in the theories of fermion masses.


Chun Zhang, a graduate student working with Dr.
Hai-Ping Cheng of QTP, received the CNMS (Center for
Nanophase Materials Science) Research Scholar Award from
Oak Ridge National Laboratory. Chun received this award
based on his work on quantum transport through molecular
junction and spin-dependent tunnelling through magnetic
The CNMS Research Scholar program provides a limited
number of competitive awards to outstanding graduate
students and postdoctoral researchers, for research carried out at ORNL that
serves to advance user research facilities/capabilities. These merit-based awards
are intended to encourage contributions by outstanding young researchers in areas
of special importance to the CNMS and the national nanoscience community.


Sudarshan Ananth has been awarded the McLaughlin
Dissertation Fellowship for the Spring 2005 semester. This
award will allow Sudarshan to focus on the writing of his PhD
thesis in the general area of theoretical high energy physics.
Dr. Pierre Ramond is the chair of his Supervisory Committee.
This generous award is made possible by the Charles Vincent
and Heidi Cole McLaughlin Endowment in the College of
Liberal Arts and Sciences.


Alumni EdMion

is good as

undergraduate physics major
at the University of Florida. The
Society of Physics Students continues to Q
encourage undergraduate research through its
ROFU (Research Opportunities For Undergraduates) I
meetings, initiated in 2003-2004 by SPS advisor Prof.
Yoonseok Lee. UF physics students also have sought
out summer research opportunities abroad in such exotic
places as the Canary Islands, Scotland, and China. UP News,
the student-run undergraduate physics newsletter that was
established in Spring 2004 continues to circulate monthly. Each
month, students are able to read news that reflects the eclectic
talents and interests of the physics department. Topics range
from undergraduate research interviews to opinions on Star
Trek to reports on SPS outreach. We, the UP News staff, hope
this sampler of articles from past UP News issues provides
an entertaining perspective on what life is like now for the
undergraduate physics major. You can sigh and weep
for the good old days...or scoff and grumble about
how you had to wade through twenty feet of
I think snow while beating off alligators with a stick
the divide to get to class back when you were dramatically
b e t e e n a young whippersnapper of a d i f f e r e n t.
science and art physics student During the SPS
isn't as vast as one sics s en. meeting Schreiber
might think. Visualize a elicited the help of physics
river with science on one side students to help install the piece,
and art on the other; while they which consisted of large concrete
are two distinct banks, the same slabs, four metal rings eight feet
water flows on their shores. in diameter, and lots of lasers.
Artist Matthew Schreiber crossed Not your typical sculpture.
the length of this Schreiber
proverbial river mentioned that
with the opening many in theartworld
of his exhibit, titled don't know how
"The Force", on to react to science
display November when he places it
2004 through in the context of
January 2005 at the a gallery space.
University Gallery. Judging by the
Schreiber graduated a n d reaction at the SPS
from UFwith a BFAin meeting, I think the
1990. As a student, r a I science world has
it was a physics class P I I I similar hang-ups.
he took with Dr. F r The misconception
Stanley Ballard that I of science as
furthered his interest by Erica Bolin merely a process
in light, physics, and of uncovering
the nature of vision. facts leaves out
He began making holograms with the vast amount of creativity
Dr. Ballard and has since worked behind it. While I don't think
in several different media, often anyone would blatantly deny the
using science as his primary imagination physics requires,
subject. the subject doesn't seem to be
At a November SPS meeting confronted very often. Similarly,
Schreiber gave a presentation much of art requires the same
describing some of his previous attention to technique and skill
artwork using video holographs that a researcher must have to
and other multimedia. The idea for study scientific phenomena, but
his next exhibit, "The Force", was because the outcome is not about
the process, as in art, this is often overlooked. The opening Friday,
November 19th drew large crowds as it coincided with the College
of Fine Arts' yearly open house, "Art Bash". Even though I had the
opportunity to work on the installation early in the process, seeing the
final product was astonishing. With the aid of both physics students
and art students, Matthew Schreiber constructed two pieces over the
course of eleven days. The main element dominated the room as over a
hundred lasers pointed to one spot in the center of the space. The other,
smaller piece located on the far side of the room was a nonfunctional
Michelson interferometer. A fog generator was used to heighten the
visual effect of the lasers.

One hundred and
undergraduate physics
were kind enough
out our first ever
News survey
Here are the
in results!

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forty-one Studwt S/
to -ill A C Better ingredients really I
UP do mean better pizza. Papa John's
S would be thrilled to learn that it garnered
the most votes for physics students' favorite
Spizza joint.
0V Over 60% of physics students are planning on getting
Their masters degree and/or doctorate. Thirty percent of
V you will be going to graduate school for physics. We certainly
Share an ambitious group, and good luck to you all.
While 13 people did say that they had contemplated moving
SInto the SPS Lounge, even more didn't know what the Lounge was.
So here you are: the SPS Lounge is a room where physics students
can hang out and study. It's located in room 2229 on the second
floor of the New Physics Building. Stop in and say hi sometime'
For those 34% of you who lose sleep at night wondering what
HIlbert Space Is, you will have to keep wondering. We had intended
to include an article on this elusive topic in this issue, but cheer up,
there's always next month.
It is generally accepted that about 20", of the population is left-
handed but only 12.5% of those surveyed favor their left hand.
Apparently there is a shortage of lefty physics students. There
is also one ambidextrous student among us. Perhaps there
is a scholarship available for that?
If a physics student vvere part of a more, he/she
would be the chocolate. I'm sure this symbolizes
something, but exactly what it symbolizes
has yet to be determined.


",e* ,0,"I sy~Os stu0Ik A note for the 6
small number of you who *i',
f'l2 claimed to have never used the '~
*' :.. I physis bathooms: you are definitely "
1S ll0% missing out. FOrty -ur percent of physics -.
S.rr -, students wouldn't mind eating lunch In there or
S a*MuM.rf perhaps trying some Mfrkonless eperlments.
S*Thty-seven percent of you are involved in research
at the University of Florlda and fewer than 15% are
applying to an REU for this summer. If you're one of the
28% who don't know what an REU Is, that's Research
Experiences for Undergraduates.
Appring Far *REU thi is. mu iTA And now for the most important statistic of all: how
many of you actually read UP News. Thirtyto percent
S- -of you don't know what UP New Is and therefore will
.P L, probably never know what became of that weird
Is survey you filled out. Rft-one parent of you will
"M4- read newsletter fyou me arossone. And
wnw rr ain RItuJ our most devoted fans, those who read
every lasue and vilt our webtde,
make up 17% of those
e\eb rates s ap

Reflections La Telesc
It has been a year since UP News ahhhh
Published its first issue. By the way, it's not ah
U-P News"; but "UP" as in "whats UP in this issue"
(yes, we delight in comy phrases). In the feature
artide, we interviewed physics major Becky Goria about
her incorporation of sdence into her volunteer work with the
Zj Girls Club of Alachua County. In addition to articles reviewing
Solais and recommending a programming class, we began our )
four part Undergraduate Advisor Spotlight series, which informed /
readers of matters of not-so-critica/ importance but great interest,
such as Prof. Darin Acosta's favorite sport (cycling) and physics hero
(Richard Feynman). a
The staff that started the newsletter is still here...all six of us: Erica b
Bolin, Amruta Deshpande, Rahawa Haile, Katherine Keller Linda Watson, is
and me. Considering the guy-to-girl ratio in the physics department, the sI
staff seems to be suffering from curiously low levels of testosterone. But di
"suffering" is the wrong word. Working with the UP staff over the past is
year has been truly enjoyable, and the absence of the hairier sex has ai
been less a source of grief than amusement. We have been thankful w
for the support of our faculty advisor, Prof. Yoonseok Lee, and the w
sponsorship of the Society of Physics Students. Of course, we are
most thankful to you, our readers. It is you who gives life to our
newsletter. We are grateful for the kind comments that have Ju-
come our way. Maybe you don't know just how much our Spa
words mean to us. I'm especially glad to hearfrom the staffers Span
about readers commenting specifically on their articles scuba
e.g. Rahawa and her Star Trek article (vol2 issue) and co
I guess community really is something that that thE
Trek fans cherish and Amruta's account of unique:
her pleather-panted scooting adventure volcano
(vol2 issue3, which has elicited of th
quite a humorous response.
N The
Putting out
0 every month is
e" significant contri

r staff member. We would like to expand '
our staff. Especially needed are more
writers, a photographer and an assistant
webmaster to maintain the online version of
the newsletter. Joining UP News is a good way
to get involved with the physics department
and keep your English skills from atrophying
away entirely. We also would like more
outside submissions from undergraduates.
The articles from guest writers have been
excellent, and we look forward to seeing
L more.
Linda is graduating this semester, and
L the rest of the staff will follow suit
eventually (we hope) but even
after the original staffers have
all gone, we hope UP
News will remain.




to fu.Y
'-U _a-Dr

-~ LU J 0D

Justin Zumsteg, a physics
and astronomy major from UF,
spent his summer in the Canary
Islands--a cluster of Spanish islands
off the Northwest coast of Morocco. He
was on the island Tenerife working at
the Instituto de Astrofisica de Canarias
(IAC), with whom Florida is in league
o build what will be the largest single
erture telescope in the world! The Gran
:opio Canarias will be a 10m telescope on
ma (one of the other Canary Islands)...
, an astronomer's dream!
Justin spent ten weeks in the
Canary Islands working with Marc
Balcells and Mercedes Priedo on
Model Independent Morphology of
High-Z Galaxies. The current method
of classifying galaxy structure is the
Hubble System which is based on visual
inspection. To eliminate the subjectivity,
Justin used a program written to classify
galaxies. This IRAF (Image Reduction
nd Analysis Facility) script was written
y Chris Conselice from Caltech and
called CAS. It is named for the
structural variables examined to
determine how the galaxy's structure
classified, such as concentration
nd asymmetry. Justin's main goal
'as to generalize CAS to be used
ith different data sets.
In addition to astronomy,
;tin was able to experience the relaxed
nish culture. He became proficient at
ish, made many a trip to the ocean to go
diving, hiked, Salsa danced, and trained
mpeted with a swim team. He also noted
e climate of the Canary Islands is quite
the island Justin was on is "just a big
o that slopes down to the sea. Because
e change in elevation, the island has
microclimates, where essentially "an
area the size of a city
block has its own
weather patterns."
6 I don't know
Future about you, but
the newsletter 94 I'm ready
only possible with for a field
butions from each trip!


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Organized by Dr. Jack Sabin, the Department of Physics
and the Quantum Theory Project held the 25th Brandt-
Ritchie Workshop (formerly known as the Werner
Brandt Workshop) at the physics building in April
2005. The topics explored during the workshop were
Dynamic Charge State Effects, Target Phase Effects,
Channeling, Target Anisotropies, and Plasmon Effects.
The workshop was well attended with participants from
Germany, Spain, Hungry, Argentina, Mexico, and the
USA. The first two days consisted of the presentations
of the participants, both theoretical and experimental Dr.Jack Sabi
talks. A round table discussion of two recent articles from Nature and PRL
occurred on the third day. This round table discussion was widely herald as a
good closure to the workshop. The 2006 meeting will be held in Paris, France.


In honor of Dr. David Tanner's 60th Birthday, a symposium was given in April
2005. Colleagues and friends from all over the nation and internationally came
to honor Dr. Tanner's personal and professional achievements.
Organized by Jan Musfeldt (Univ of Tennessee), David Reitze (UF), Chris Stanton
(UF), and Nacira Tache (UF), with the administrative support of Janet Germany,
the TannerFest was a wonderful time for all those involved. Participants enjoyed a
tour of Dr. Tanner's lab and current work,
along with a reception at the Hilton.
At the dinner, held at the Harn
Museum, participants were entertained
by anecdotes about Dr. Tanner and the
three day celebration was topped off by
a rainy, but fun, picnic at Santa Fe River. :

(MARCH 5- 11,2005)
source: Dr. Samuel Trickey

"Back to the Beach!" was an
obvious slogan for the 45th Sanibel
Symposium. While not back on
Sanibel Island (the Symposium left in
1977 and not been back), the meeting
had a beach-front location for the first
time in many years. The King and
Prince Resort Hotel on St. Simons
Island, GA proved to be a highly
popular new venue with participants.
Registration was up by roughly 20
percent, beginning to approach pre
9/11 levels. International participation,
particularly from developing nations,
continued to be limited by economics
and visa barriers.
The meeting format remained
roughly as adopted in 2004, 6 days
with 17 Plenary (Invited Talk) sessions
and 6 Poster sessions. The last three
Plenary sessions honored the myriad
contributions of Enrico Clementi.
Other Plenary focus topics included

Metals in Biology,
Challenges in
Transport Theory,
Density Functional
Theory and Magnetic Fields,
Dynamical Mean Field Theory, High-
level Methods for Electron Correlation,
Large-scale Simulations of Condensed
Systems, Relativistic Quantum
Mechanics, Biomolecular NMR,
Semi-empirical Electronic Structure
Methods, Multi-reference Coupled-
cluster and Many-body Perturbation
Methods, Protein Design, Cytochrome
P450, and Explicitly- correlated
Quantum Chemical Methods.
A feature introduced last year was
continued: two tutorial sessions
were offered to introduce graduate
students to the topics of the Plenary
Sessions. For the fourth straight year,
the participant survey showed high

King and Prince Resort Hotel, St. Simons Island,
Georgia (credit: QTP t.ift

satisfaction with the scientific program
and speaker selection (4.1 4.4 on a 1-5
scale with 5 best). The Army Research
Office, Office of Naval Research, and
IBM Corporation provided external
funding. UF's Vice President for
Research, College of Liberal Arts and
Sciences, and QTP's home departments
(Chemistry, Physics) also contributed
much-appreciated funding.
The 46th Symposium will take place
at the King and Prince Resort Hotel
Feb. 26 Mar. 3, 2006. Reservations
and information is at http:www.qtp.
ufl.edu. Click on "Sanibel" in the
menu on the left side.

University ofFlorida Department of Physics 13



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R. Cabrera-Trujillo, J.R. Sabin, Y. Ohrn, and E. Deumens. "Stop-
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R. Cabrera-Trujillo, J.R. Sabin, E. Deumens, and Y. Ohrn. "Predic-
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R. Cabrera-Trujillo, J.R. Sabin, Special Editors. "Theory of the
Interaction of Swift Ions with Matter. Parts 1 & 2." J.R. Sabin and
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N. Flocke and R.J. Bartlett. "A Natural Linear Scaling Coupled-
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D. Jacquemin, B. Champagne, J.M. Andre, E. Deumens and Y.
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for Ab Initio Band Structure Calculations On Polymeric Systems."
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D. Masiello, E. Deumens and Y. Ohrn. "Dynamics of an Atomic
Electron and Its Electromagnetic Field in a Cavity." Phys. Rev. AA
71, 032108 (2005).

D.A. Micha and B. Thorndyke: "The Quantum-Classical Density
Operator for Electronically Excited Molecular Systems", Chapter
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S.B. Trickey, J.A. Alford, and J.C. Boettger. "Methods and Imple-
mentation of Robust, High-precision Gaussian Basis DFT Calcula-
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T. Zhu, J. Li, S. Yip, R.J. Bartlett, S.B. Trickey and, N.H. de Leeuw.
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tions 29, 671-76 (2003).

W. Zhu and S.B. Trickey. "Exact Analytical Solutions for Two Elec-
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I.V. Bobkova, P.J. Hirschfeld and Y.S. Barash." Spin-Dependent
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M. Bonitz and J.W. Dufty. "Quantum Kinetic Theory of Metal Clus-
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A.V. Chubukov, D. L. Maslov, S. Gangadharaiah, and L. I. Glazman.
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X. Du, S.-W. Tsai, D.L. Maslov, and A.F. Hebard. "Metal-Insulator-
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J.W. Dufty and J.J. Brey. "Hydrodynamic Modes for Granular Gas."
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Florida Physics News Physics Alumni Newsletter 14

J.W. Dufty, I. Pogorelov, B. Talin and A. Calistic. "Nonlinear
Response of Electron Dynamics to a Positive Ion." J. Phys. A36,
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S. Gangadharaiah, D. L. Maslov, A. V. Chubukov, and L.I. Glazman.
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tum Coherence in an Exchange-Coupled Dimer of Single-Molecule
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P.C. Howell, A. Rosch and P.J. Hirschfeld. "Relaxtion of Hot Qua-
siparticles in a d-Wave Superconductor?" Phys. Rev. Lett. 92,
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T.L. Hughes, A.D. Klironomos and A.T. Dorsey. 'Fingered' Pat-
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J. Hwang, D.B. Tanner, I. Schwendeman, and J.R. Reynolds.
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Three Dioxythiphene-based Conjugated Polymers." Phys. Rev.
B67, 115205 (2003).

J.S. Kim, N.O. Moreno, J.L. Sarrao, J.D. Thompson, and G.R.
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F.D. Klironomos and A.T. Dorsey. "Tunneling Between Two-Dimen-
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A.E. Kovalev, S. Hill, K. Kawamo, M. Tamura, T. Naito, and H.
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K. Lee, Z. Wu, Z. Chen, F. Ren, S. J. Pearton, and A. G. Rinzler.
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G. Mueller, T. Delker, D.B. Tanner, and D. Reitze. "Dual Recycled
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A. Patil, J. Sippel, G. W. Martin, and A. G. Rinzler. "Enhanced
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I. Paul, C. Pepin, B. N. Narozhny, and D. L. Maslov. "Quantum Cor-
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L. Radzihovsky and A.T. Dorsey. "Theory of Quantum Hall Nemat-
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J.L. Sarrao et.al." Plutonium-Based Superconductivity Above
18K." Nature 420, 297-299 (2002).

M.B. Silva Neto, A.H. Castro Neto, D.J. Mixson, J.S. Kim and
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S. Wise, et.al. "Phase Effects in the Diffraction of Light: Beyond
the Grating Equation." Phys. Rev. Lett. 95, 013901 (2005).

Z. Wu et.al. "Transparent, Conductive Nanotube Films." Science
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E.-C. Yang, C. Kirman, J. Lawrence, L.N. Zakharov, A.L. Rhein-
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L. Zhu, P.J. Hirschfeld and D.J. Scalapino. "Elastic Forward Scat-
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P. Markos, K.A. Muttalib, P. Wolfle and J.R. Klauder. "Conductance
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K.A. Muttalib and V.A. Gopar. "Generalization of the DMPK Euation
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K.A. Muttalib and J.R. Klauder. "Family of Solvable Generalized
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A. Birkedal, K. Matchev, and M. Perelstein. "Collider Phenom-
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CDF Collaboration. "Measurement of Charged Particle Multiplici-
ties In Gluon and Quark Jets in Proton Anti-Proton Collisions at
S**(1/2) = 1.8-TEV." Phys. Rev. Lett. 94, 171802 (2005).

CDF Collaboration. "Momentum Distribution of Charged Particles
in Jets in Dijet Events in Proton Anti-Proton Collisions at S**(1/2)
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C. Charmousis, V. Onemli, Z. Qiu and P. Sikivie. "Gravitation-
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S. Gudmundsson, C.B. Thorn, and T.A. Tran. "BT World Sheet for
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F-S. Ling, P. Sikivie and S. Wick. "Diurnal and Annual Modulation
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V.K. Onemli and R.P. Woodard. "Super-Acceleration from Mass-
less, Minimally Coupled Phi**4." Classical and Quantum Gravity,
19, 4607 (2002).

T. Prokopec, I. Tornkvist and R.P. Woodard. "One Loop Vacuum
Polarization in a Locally de Sitter Background." Annals of Physics,
251 (2003).

P. Sikivie. "Evidence for Ring Caustics in the Milky Way." Phys.
Lett. B567, 1 (2003).

M.E. Soussa and R.P. Woodard. "The Force of Gravity from a
Lagrangian Containing Inverse Powers of the Ricci Scalar." Gen-
eral Relativity and Gravitation, 36, 855 (2004).

C.B. Thorn. "A World Sheet Description of Planar Yang-Mills The-
ory". Nucl. Phys. B637:272-292, 2002, Erratum-ibid. B648:457,

C.B. Thorn. "Renormalization of Quantum Fields on the Lightcone
Worldsheet. 1. Scalar Fields." Nucl. Phys. B699:427-452, 2004.

R. DeSerio. "Chaotic Pendulum: The Complete Attractor." Am. J.
Phys. 71, 250 (2003).

R. DeSerio. "Synchronous Analog I/O for Acquisition of Cha-
otic Data in Periodically Driven Systems." Am. J. Phys. 72, 553

University ofFlorida Department of Physics 15



Eduardo "Eddie" Calleja, an undergraduate student in
Physics, won First Place in the Oral Presentation Com-
petition in Physics at the Florida-Georgia Louis Stokes
Alliance for Minority Participation (FLGSAMP) Expo
2005. Eddie gave a presentation entitled, "High Resolu-
tion Sound Velocity Measurements Using a Path Length
Modulation Technique." The research for this presenta-
tion began when Eddie was a student in the 2002 Summer
Research Experiences for Undergraduates (REU) program
which was supported by the National Science Founda-
tion and the University of Florida. Eddie continued his
research upon entering Professor Yoonseok Lee's research
group during the 2003 Summer REU program and has
stayed with Prof. Lee's group since that time.
FLGSAMP serves over 1000 undergraduate students who
major in one of the SEM disciplines, (Science, Engineering,
and Mathematics). Its focus is to help increase the number
of underrepresented students gain baccalaureate degrees.
The alliance includes 11 schools from Florida and 1 from
Georgia. (http://www.fglsamp.com)


Catherine Yeh, an undergraduate physics major, received
the $1500 Judith Ann Young Scholarship from the Wom-
en's Club (2005). This scholarship is given in recognition of
overall excellence in scholarship, leadership, and service to
the campus and community. Cathy is a promising under-
graduate physics student as well as Vice-President of the
UF Chapter of the Society of Physics Students. She also
serves as the editor-in-chief of the Undergraduate Physics
Newsletter which is staffed primarily by female physics
undergraduate majors.

SChris Cook won
the SPS "Dress
Like a Famous
Physicist Contest."

C hris is an
u undergraduate
major, dressed like
James Maxwell.


PIBsigcs go. 0 Ie




I Visiting students are divided into manageable size groups, usually led by either an SPS
student or a volunteering staff/faculty member, along with Dr. Van Rinsvelt and Dr. Robert
DeSerio. Each visitor has a chance to use the exhibit while the leaders give a brief
S description of the science behind the fun of manipulating the display. A non-scientific
survey has found that most students prefer to zap their friends with the effects of the
plasma ball and erupt into fits of screeches and giggles at the site of a big green T-Rex

The exhibits are open to the public year round and
available to anyone who happens to meander
into the New Physics Building. Scheduled tours
and school groups are arranged through Dr.
Henri Van Rinsvelt and the outreach program
webpage (http://www.phys.ufl.edu/outreach/) is
readily available to visitors who wish to preview
the exhibits before they come for a visit.

An exciting addition to the physics department.
the lobby exhibits area big draw for area students'
curiosity into the world of science.
Prof Henri Van Rins'velt/
3n52-392y.- 144u7
henriphys, ufl. edu

4 -t

l l' i

The Department of Physics Lobby Exhibits
opened in December 2002. The original
six science exhibits included a T-Rex
Hologram, Parabolic Dishes, a Large
Plasma Ball, a Giant Guitar String,
the Anti-Gravity Mirror, and a
"Real-Image" Object display that
changes objects periodically. Two
recent additions since the grand
opening are the Spectra exhibit
and the Chaotic Pendulum.
Under the direction of Dr. Henri Van
Rinsvelt, more than 1000 children
from area schools have visited the
physics lobby during UF Engineering
Week, school field trips, and summer
stays at the Girls Club of Alachua County. Even a group from Sidney Lanier (a school for
the disabled) came to enjoy and marvel at the physics displays.


C 1

I 1 01
It- N ib -C

Celebrating Our Recent PhD Graduates

FALL 2004

Luis Breva-Newell
"Radiative Decays of the Upsilon (1S) into Two Charged Hadrons"
Chair: Prof John Yelton

Xu Du
"Magnetotransport and Tunneling Study of the Semimetals:
Graphite and Bismuth"
Chair: Prof Art Hebard

Abu Mohammad Abdus Sayem Khan
"Study of the Continuous Spin Representations of the Poincare and
Super-Poincare Groups and their Construction by Inonu-Wigner
Group Contraction"
Chair: Prof Pierre Ramond

Evren Ozarslan
"Developments in Diffusion Weighted MRI with Applications to
Neural Tissue"
Chair: Prof Thomas Mareci

Hidenori Tashiro
"Time-Resolved Infrared Studies of Superconducting Molydenum-
Germanium Thin Films"
Chair: Prof David Tanner

Andrew C. Wint
"A Far-Infrared Electro-optic Effect in Thin Superconducting
YBa Cu O Films"
Chair: Prof. avid Tanner

Chun Zhang
"Transport Properties at Nano-Scale via First Principles Approach"
Chair: Prof Hai-Ping Cheng


Suhas Gangadharaiah
"Interacting Fermions in Two-Dimensions: Effective Mass, Specific
Heat, and Singularities in the Perturbation Theory"
Chair: Prof Dmitrii Maslov

Filippos Klironomos
"Tunneling Between Two-Dimensional Electron Systems in a High
Magnetic Field and Crystalline Phases of a Two-Dimensional Elec-
tron System in a Magnetic Field"
Chair: Prof Alan Dorsey

Aditi Mallik
"Multi-Scale Modeling of Solids as a Composite of Quantum
Mechanical (QM) and Classical Mechanical (CM) Domains"
Chair: Prof Jim Dufty

Daniel J. Mixson
"Differing Roles of Disorder: Non-Fermi-Liquid Behavior in UCu xNix
and Curie Temperature Enhancement in UCu Si2 Gex"
Chair: Prof Gregory Stewart

Alexandre Pronko
"Fragmentation of Quark and Gluon Jets in Proton-Antiproton Col-
lisions at Center-of-Mass Energy of 1.8 TeV"
Chair: Prof Andrey Korytov

Jennifer Sippel-Oakley
"A Study of Charge Induced Actuation in Carbon Nanotubes and
Resistance Changes in Carbon Nanotube Networks"
Chair: Prof Andrew Rinzler

Marc Soussa
"Modified Gravity Theories Alternatives to the Missing Mass and
Missing Energy Problems"
Chair: Prof Richard Woodard

Lingyin Zhu
"Quasiparticle Scattering and the Local Electronic Structure of D-
Wave Superconductors"
Chair: Prof Peter Hirschfeld


Sudarshan Ananth
"Maximally Supersymmetric Theories on the Light-Cone"
Chair: Prof Pierre Ramond

Luis Alberto Cruz
"Using Max/Min Transverse Regions to Study the Underlying Event in
Proton-Antiproton Collisions at Vs= 1.97 TeV"
Chair: Prof Rick Field

Dong-Hoon Kim
"Radiation Reaction in Curved Spacetime"
Chair: Prof Steven Deiweiler

Wuming Zhu
"Numerical and Exact Density Functional Studies of Light Atoms in
Strong Magnetic Fields"
Chair: Prof Samuel Trickey

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