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Aktuelle Veranstaltungen

 

Kolloquium

Thema:

Vorstellung der Arbeitsgruppen

Datum:

27.11.17

Uhrzeit:

16:15

Ort:

H6

Vortragender:

Arbeitsgruppen der Physik

Inhalt:

Ansprechpartner:

Fachschaft

Kolloquium Mathematische Physik

Thema:

Mesoscopic eigenvalue correlations of random matrices

Datum:

01.12.17

Uhrzeit:

16:00

Ort:

V2-210/216

Vortragender:

Antti Knowles

University of Geneva

Inhalt:

Ever since the pioneering works of Wigner, Gaudin, Dyson, and Mehta, the correlations of eigenvalues of large random matrices on short scales have been a central topic in random matrix theory. On the microscopic spectral scale, comparable with the typical eigenvalue spacing, these correlations are now well understood for Wigner matrices thanks to the recent solution of the Wigner-Gaudin-Dyson-Mehta universality conjecture. In this talk I focus on eigenvalue density-density correlations between eigenvalues whose separation is much larger than the microscopic spectral scale; here the correlations are much weaker than on the microscopic scale. I discuss to what extent the Wigner-Gaudin-Dyson-Mehta universality remains valid on such larger scales, for Wigner matrices and random band matrices.

Ansprechpartner:

G. Akemann

Seminar Hochenergiephysik

Thema:

Getting even with CLE: proofs, problems and results

Datum:

21.11.17

Uhrzeit:

14:15

Ort:

D6-135

Vortragender:

Ion Olimpiu Stamatescu

Heidelberg

Inhalt:

In the landscape of approaches toward the simulation of Lattice Models with complex action the Complex Langevin Equation (CLE) appears as a straightforward method with a simple, well defined set up. Its applicability, however, is controlled by certain specific conditions which are not always satisfied, such as holomorphy and limited diffusion in the non-compact directions. We here discuss these conditions and the difficulties related with them as well as the procedures designed to meet them. We provide details about what the method can and did achieve, which are its present limitations and which are its prospects. We involve tests and insights from simple, solvable models and present results from lattice models, including QCD, especially concerning the attempt to explore the phase diagram of the latter at non-zero chemical potential. The present effort concerns reaching low temperature in finite density QCD and also simulations for real (Minkowski) time prolblems. (Common work with G. Aarts, K. Boguslavski, M. Scherzer, E. Seiler and D. Sexty)

Ansprechpartner:

Ch. Schmidt

Seminar Kondensierte Materie

Thema:

Lateral trapping of DNA inside a voltage gated nanopore

Datum:

23.11.17

Uhrzeit:

14:15

Ort:

D5-153

Vortragender:

Thomas Toews

Bielefeld University

Inhalt:

Ansprechpartner:

Peter Reimann

Seminar Mathematische Physik

Thema:

CFT and SLE in a doubly connected domain

Datum:

09.11.17

Uhrzeit:

16:00

Ort:

D5-153

Vortragender:

Sungsoo Byun

Seoul National University

Inhalt:

In this talk, I will present certain implementations of conformal field theory (CFT) in a doubly connected domain. The statistical fields in these implementations are generated by central charge modifications of the Gaussian free field with excursion reflected/Dirichlet boundary conditions. I will explain Ward's equation in terms of a stress energy tensor, Lie derivative operators and the modular parameter. Combining Ward's equation with the level 2 degeneracy equation for the boundary condition changing operator, I will outline the relation between CFT and Schramm-Loewner Evolution (SLE) theory. As applications, I will present a version of restriction property and Friedrich-Werner’s formula for annulus SLE and explain how to apply the method of screening to find explicit solutions of the partial differential equations for the annulus SLE partition functions introduced by Lawler and Zhan. This is based on joint work with Nam-Gyu Kang and Hee-Joon Tak.

Ansprechpartner:

Gernot Akemann

Seminar AG Zufallsmatrizen

Thema:

MIMO channels with progressive scattering: mutual information beyond Gaussian approximation

Datum:

22.11.17

Uhrzeit:

16:15

Ort:

T2-204

Vortragender:

Giuseppa Alfano

Politecnico di Torino, Department of Applied Science and Technology

Inhalt:

Ansprechpartner:

Gernot Akemann



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  • | Letzte Änderung: 23.11.2011
  •  Olaf Kaczmarek
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