# The 34th International Symposium on Lattice Field Theory (Lattice 2016)

24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

## Comparison of algorithms for solving the sign problem of the finite $\mu$ O(3) model in 1+1 dimensions

29 Jul 2016, 15:00
20m
Building 67 Room 1027 (Highfield Campus, University of Southampton)

### Building 67 Room 1027

#### Highfield Campus, University of Southampton

Talk Nonzero Temperature and Density

### Speaker

Mr Csaba Torok (Eotvos University, Budapest)

### Description

We study the 1+1 dimensional nonlinear O(3) model at finite chemical potential using the complex Langevin algorithm and the worm algorithm. In the latter the sign problem is totally eliminated. We determine the range of parameters, where complex Langevin produces correct results and study whether taking the continuum limit allows the exploration of the full phase diagram of the model.

### Primary authors

Mr Csaba Torok (Eotvos University, Budapest) Daniel Nogradi (Eotvos University) Prof. Ferenc Niedermayer (Bern University, Albert Einstein Center for Fundamental Physics) Prof. Sandor Katz (Eotvos University)

 Slides