Barak Bringoltz Personal web site (new) Particle theory group Department of Physics University of Washington, Seattle Main Quantitative Expertise Algorithm Development Large scale Computer Simulations (Monte Carlo, Molecular Dynamics, Flat Histogram.) Optimization problems (signal-to-noise ratio), noise reduction Minimization, mapping, and Integration of Multi-dimensional functions (Conjugate Gradient, Wang-Landau, Monte-Carlo) Statistical Data Analysis Time Series Analysis (averages of moments, autocorrelations, convergence, rare events, re-weighting) Bayesian Statistical analysis and Maximum Likelihood. Model parameters determinations, model validation, hypothesis validations Mathematical skills in applied math and physics Built & analyzed tens of mathematical models for complex physics systems. Methods of analysis: Steepest descent, Mean field, various expansion schemes (strong coupling, weak coupling, low and high Temperature). Solved Integral and Differential equations using iterative Algorithms.

Research Interests:

Theoretical nuclear and high energy physics

• Monte-Carlo simulations of gauge theories with and with out fermions.
• Gauge theories in the limit of a large number of colors (large-N).
• The Lattice regularization scheme for gauge theories.
• Quantum Chromo Dynamics (QCD) in its lattice regularization.
• QCD at extreme conditions : nonzero chemical potential and temperature.
• QCD and strings.
• Large-N expansions.

Statistical mechanics and condensed matter physics

• Monte-Carlo simulations of spin systems.
• Quantum spin systems, frustrated magnets.
• Semi classical approximations, the limit of large Spin.

Organization of Workshops:

July 2010:
ECT* workshop on confining strings and flux-tubes organized together with O. Aharony and M.Teper

February 2009:
INT workshop on large-N gauge theories organized together with M.Shifman, M. Unsal, and L.Yaffe

Recent talks

• Spacetime reduction in large-N gauge theories, v1 (december 09) - Duke University, December 2009, University of Maryland, December 2009, Stanford/SLAC, December 2009.

• Strings in SU(N) gauge theories - Israeli Joint High Energy Seminar, Newe Shalom, November 2009.

• Spacetime reduction in large-N gauge theories - Numerical large-N methods for AdS/CFT, gravity and QCD meeting, Imperial college London, September 2009, University of Edinburgh, October 2009, Weizmann Institute, October 2009, The Technion, October 2009, Tel-Aviv University, October 2009, The Hebrew University, November 2009.

• On dense large-N QCD in two dimensions - Extreme QCD workshop, Seoul, August 2009

• Large-N QCD flux-tubes and strings - Lattice QCD workshop, KITPC, Beijing, July 2009

• Volume independence of large-N QCD with Wilson adjoint fermions at weak coupling - Lattice conference, Beijing, July 2009

• On the behavior of large-N QCD at zero temperature and nonzero chemical potential - workshop on "Sign Problems and Complex Actions", ECT* Trento, Mar `09, Brookhaven national lab theory seminar, Mar `09

• Lattice explorations of QCD strings/flux-tubes and their large-N limit - Annual meetings of the Israeli Physical Society, Dec `08, Ben-Gurion University, CERN theory division lattice seminar, Mar `09, CCNY, Mar `09

• On the status of non-perturbative large-N equivalences - The Weizmann Institute, Technion, Tel-Aviv University, Ben-Gurion University, Dec `08 - Jan `09, Oxford university, Mar `09

• Breakdown of large-N reduction in the quenched Eguchi-Kawai model - SFSU, "Lattice Gauge Theory for LHC Physics" workshop LLNL, UCLA (May 2008), "Lattice 2008", Williamsburg, Virginia July 2008

• Why large-N from on the lattice ? - General talk

• k-strings in SU(N) gauge theories in 2+1 dimensions - "Lattice 2007", Regensburg (August 2007), The Newton Institute, August 2007

• SU(N) gauge theory with large-N in 2+1 dimensions : a perspective from the lattice - an invited talk at the "Yang-Mills theories : Nonperturbative aspects" workshop, CUNY New-York, January 2007, Oxford, January 2007, Newe-Shalom's Israeli HEP Joint seminar, April 2006

• Color flux-tubes/strings and the Hagedorn temperature : a perspective from the lattice - NTG, Stony Brook, Columbia University, December 2006, University of Washington, Seattle, TRIUMF theory, January 2007 .

• The deconfinement transition for a large number of colors - an invited review talk at the "Extreme QCD" workshop, RIKEN/BNL, August 2006, Tel-Aviv April 2006.

• String tensions of SU(N) lattice gauge theories in 2+1 dimenions - "Lattice 2006", Tucson, Arizona (August 2006) and Swansea University, June 2006.

• The critical region of strong-coupling lattice QCD in different large-N limits - "New directions in nonperturbative QCD" workshop, ECT* Trento, March `06.

• Bulk thermodynamics in SU(N) lattice gauge theories at large N - Trinity college, Dublin, December `05, University of Liverpool, October `05, and "Extreme QCD", August `05.

• The pressure, and a possible hidden Hagedorn transition at large-N - "Lattice 2005", Trinity college, Dublin, July `05.

• Strong coupling lattice QCD at high density - University of Swansea, Nov. `04, University of Oxford, Oct. `04, TAU July `04, MIT Feb. `04, BNL Feb. `04, SUNY. Jan. `04.

Publications

Ph.D. thesis

Office: +1-(206)-543-9640
FAX:    +1-(206)-543-5923 

Copy of DOE 08 talk

Copy of IPS 08 talk

Copy of nonperturbative 08 talk

Copy of HUJI 09 talk

Copy of talk at the large-N meeting at the INT - Feb 09

Copy of talk at the sign problem meeting at Trento - Mar 09

Copy of keynote file - extended QEK talk

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My CV, home page, SnY