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Aktuelle Veranstaltungen

 

Kolloquium

Thema:

Used Nuclear Fuel - Past, Present, and Future

Datum:

29.01.18

Uhrzeit:

16:15

Ort:

H6

Vortragender:

Dr. Maik Stuke

Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH

Inhalt:

After a short introduction and overview of the company GRS I will focus on the past, present, and future of nuclear fuel used in German nuclear reactors. A summary of the origin and composition of different types of used nuclear fuel will be followed by an overview of the current situation and future plans of storage. This includes an overview of the foreseen steps until a final repository. I summarize my talk by discussing some open scientific questions.

Ansprechpartner:

D. Schwarz

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:

Novel Critical Behavior: From Spin Systems to Bird Swarms

Datum:

23.01.18

Uhrzeit:

14:15

Ort:

D6-135

Vortragender:

Helmut Satz

Bielefeld

Inhalt:

Twenty years ago, Tam´as Vicsek and collaborators introduced “a novel type of dynamics to investigate self-ordered motion of particles with biologically motivated interaction”. The model is a generalized spin system, proposed to account for the swarm formation of birds; the birds’ velocities become the spins. The resulting two-dimensional spin system has continuous rotational symmetry, but because of dynamical features it leads to spontaneous symmetry breaking and a phase transition to a state of long-range order in both one and two dimensions. It has become of considerable interest in different areas of statistical physics and continues to pose challenging problems.

Ansprechpartner:

H. Satz

Seminar Kondensierte Materie

Thema:

Finite-temperature dynamics using matrix product states

Datum:

26.01.18

Uhrzeit:

14:15

Ort:

V2-205

Vortragender:

Salvatore Manmanna

Universität Göttingen

Inhalt:

Ansprechpartner:

Jürgen Schnack

Seminar Mathematische Physik

Thema:

Exploring the boundaries of universality for Gaussian perturbations of Hermitian matrices

Datum:

24.01.18

Uhrzeit:

16:00

Ort:

V3-201

Vortragender:

Thorsten Neuschel

University Catholique de Louvain

Inhalt:

We explore the boundaries of sine kernel universality for the eigen- values of Gaussian perturbations of large deterministic Hermitian ma- trices. Equivalently, we study for deterministic initial data the time after which Dyson's Brownian motion exhibits sine kernel correlations. We explicitly describe this time span in terms of the limiting density and rigidity of the initial points. This is joint work with Tom Claeys and Martin Venker.

Ansprechpartner:

Gernot Akemann

Seminar AG Zufallsmatrizen

Thema:

Exploring the boundaries of universality for Gaussian perturbations of Hermitian matrices

Datum:

24.01.18

Uhrzeit:

14:15

Ort:

V3-201

Vortragender:

Thorsten Neuschel

University Catholique de Louvain

Inhalt:

We explore the boundaries of sine kernel universality for the eigen- values of Gaussian perturbations of large deterministic Hermitian ma- trices. Equivalently, we study for deterministic initial data the time after which Dyson's Brownian motion exhibits sine kernel correlations. We explicitly describe this time span in terms of the limiting density and rigidity of the initial points. This is joint work with Tom Claeys and Martin Venker.

Ansprechpartner:

Gernot Akemann



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  • | Letzte Änderung: 23.11.2011
  •  Olaf Kaczmarek
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