Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 71: Correlated Electrons: Poster Session
TT 71.28: Poster
Mittwoch, 18. März 2015, 15:00–18:00, Poster B
Quantum Monte Carlo calculations for frustrated spin systems — Andreas Honecker2, •Rene John Kerkdyk1, Thomas Pruschke1, and Stefan Wessel3 — 1Georg-August-Univesität Göttingen — 2Université de Cergy-Pontoise, Laboratoire de Physique Théorique et Modélisation — 3RWTH Aachen
Using Quantum Monte Carlo methods to examine the behavior of frustrated spin systems at low temperatures is usually problematic due to the sign problem. Our research focuses on a cluster approach to a model-specific elimination or reduction of the sign problem. We have implemented this approach in a worm algorithm for a one-dimensional spin-1/2 Heisenberg ladder and show that it permits access to the thermodynamic behaviour over the entire temperature range.