TBA

Dozent: Prof. Dr. von Waldenfels (Universität Heidelberg)
Datum: 03.05.18

TBA

Dozent: TBA
Datum: 17.05.18

Nonlocal operators with singular anisotropic kernels

Dozent: Dr. Jamil Chaker (Universität Bielefeld)

Datum: 07.06.18

TBA

Dozent: TBA
Datum: 14.06.18

Ergodicity and parameter estimation for some affine models

Dozent: Jonas Kremer
Datum: 21.06.18

Application of the Langevin Equation to ab initio simulations of Quantum Field Theory models

Dozent: Prof. Dr. I.-O. Stamatescu
Datum: 28.06.18

Up to very few examples (e.g. the 2-dim Schwinger model) QFT models cannot be solved analytically. Hereto many approaches have been devised, but the only general method which permits unbiased ab initio calculations is the use of stochastic processes to evaluate numerically the path integral in lattice regularisation (LFT). The Langevin Equation is among these processes the one with the highest flexibility, making it in principle applicable to many cases where no other method can even be defined, especially complex action problems.

Just as with any application of stochastic processes the reliabitity of the LE method depends on the fullfilment of a number of conditions, which in some physically relevant cases is highly non-trivial. In the talk I shall exemplify the application of the LE to three cases which illustrate the flexibility of the method, its power and its problems: non-compact QCD, coloured noise and full QCD at non-zero baryon density. The latter case is the most interesting, both from the point of view of physics and from that of the reliabilty question.

Dozent: Prof. Dr. I.-O. Stamatescu
Datum: 28.06.18

Dr Denes Sexty ( Universität Wuppertal) Titel Talk ist: The Complex Langevin equation and the sign problem for lattice models The application of the Complex Langevin equation (CLE) to several lattice models which have a sign problem at nonzero density is discussed as well as the Lefschetz Thimble method, a close relative to the CLE. In gauge models the naive CLE fails, a new procedure called 'gauge cooling' is introduced to suppress instable behavior. I also discuss potential pitfalls such as the case of non-holomorphic actions. Results are presented for the Bose Gas, HDQCD, and full QCD.

Zuverlässigkeitsbasierte, stochastische Optimierung mit Berücksichtigung von Unsicherheiten

Dozent: Prof. Dr. Roos

Datum: 05.07.18

Vorträge über Masterarbeiten (TBA)

Dozenten: Masterstudierende (TBA)

Datum: 12.07.18