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

Phase diagram of the O(3) model from dual lattice simulations

27 Jul 2016, 12:10
20m
Building 32 Room 1015 (Highfield Campus, University of Southampton)

Building 32 Room 1015

Highfield Campus, University of Southampton

Talk Nonzero Temperature and Density Nonzero Temperature and Density

Speaker

Dr Falk Bruckmann (University of Regensburg)

Description

We simulated the asymptotically free two-dimensional O(3) model at nonzero chemical potential through dual variables free of the sign problem. The system undergoes a quantum phase transition when mu reaches the particle mass (generated dynamically similar to QCD). The density follows a square root universal for repulsive bosons in one spatial dimension. We have also measured the spin stiffness, known to be sensitive to the spatial correlation length, in different scaling trajectories to zero temperature and infinite size. It points to a dynamical critical exponent z=2, which can be explained by particle worldlines. Comparisons to thermodynamic Bethe ansaetze are shown as well.

Primary author

Dr Falk Bruckmann (University of Regensburg)

Presentation Materials