Fine Theoretical Physics Institute Seminar

semester, 2008

Monday, January 21st 2008
Speaker: No seminar. Martin Luther King Jr. Day. University Closed.

Monday, January 28th 2008
Speaker: Alexander Turbiner, Instituto de Ciencias Nucleares, UNAM
Subject: About ground state of anharmonic oscillator(s)

A simple approximation of the ground state eigenfunction for both
the quantum-mechanical anharmonic oscillator and the double-well
potential given by V = m2x2 + gx4 at arbitrary g≥0- for
m2≥0- and m2 < 0- , respectively, is proposed. The approximation models perturbation theory results at small distances and WKB asymptotics at large distances. It is shown that this approximation if taken as variational trial function defines the energies of low-lying states with relative accuracy 10 - 8 - 10 - 10- even in semiclassical domain. It is also shown that this approximation if taken as zero approximation
for solving the Schroedinger equation leads to an extremely fast convergent perturbation theory. A generalization to multidimensional anharmonic oscillators is briefly discussed.

Friday, February 29th 2008
Speaker: Stanley J. Brodsky, Stanford University
Subject: AdS/QCD and Hadronic Phenomena

Friday, March 7th 2008
Speaker: Yutaka Hosotani, University of Osaka
Subject: "Gauge-Higgs Unification in Electroweak Interactions"

Thursday, March 27th 2008
4:00 pm:
FTPI Seminar in Physics 435
Speaker: Lev Cofman, CITA, University of Toronto
Subject: "Probing Inflation"

Friday, March 28th 2008
Speaker: Emil Akhmedov, ITEP
Subject: "Quantum instability of the deSitter space"

Wednesday, April 9th 2008
Speaker: Nikolai Sinitsyn, Los Alamos National Lab
Subject: "Geometric phases in dissipative and stochastic kinetics"

Friday, April 25th 2008
Speaker: Claudia de Rham, Perimeter Institute
Subject: "Field theory on codimension-two branes and the Hierarchy problem"

I examine a codimension-two brane scenario in which all the observed Standard Model particles reside on a brane but the Higgs is an elementary extra-dimensional scalar in the bulk. I first present how the brane couplings between the Higgs field and the standard model particles ought to be renormalized for the low-energy theory to be regularization independent. I then show that these renormalized couplings yield two novel effects. First, they cause the Higgs vev to depend only logarithmically on the mass term of the bulk potential, thus providing a new mechanism for tackling the hierarchy problem. Second, the Higgs brane couplings cause the lowest mass KK mode to localize near the brane without any need for geometrical effects like warping. I will then finish by exploring some preliminary implications such models have for the Higgs signature at the LHC, both in the case where the extra dimensions arise at the TeV scale, and in ADD models having Large Extra Dimensions.

Friday, May 2nd 2008

Saturday, May 3rd 2008

Sunday, May 4th 2008

Monday, May 12th 2008
There will be no seminar this week.

Thursday, May 15th 2008

Friday, May 16th 2008

Saturday, May 17th 2008

Sunday, May 18th 2008

Monday, May 19th 2008
The seminar has ended for the semester. It will return in September 2008

Tuesday, July 15th 2008
1:30 pm:
Special FTPI Seminar in Physics 435
Speaker: Geza Odor, Hungarian Academy of Sciences
Subject: The role of diffusion in branching and annihilation random walk models

Following an introduction to nonequilibrium universality classes,
which occur in basic reaction-diffusion particle models I discuss
some results obtained by cluster mean-field approximations and
simulations of such models. These findings are unexpected by perturbative renormalization group (RG) methods, but are in agreement with non-perturbative RG. This suggests that diffusion may become relevant in case of competing reactions and nontrivial phase structures can emerge even in very simple system.

Monday, September 8th 2008
The seminar will not be held this week.

Monday, September 22nd 2008
There will be no seminar this week.

Friday, December 5th 2008
Speaker: Mithat Unsal, Stanford University, SLAC
Subject: "On the IR dynamics of vector-like and chiral gauge theories and spin systems"

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