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TT: Fachverband Tiefe Temperaturen

TT 17: Correlated Electrons: Spin Systems, Itinerant Magnets 2

TT 17.1: Talk

Monday, March 11, 2013, 15:00–15:15, H19

Entanglement Entropy and Quantum Monte Carlo — •Peter Bröcker and Simon Trebst — Institut für Theoretische Physik, Universität zu Köln

Entanglement spectra and entanglement entropies have attracted a lot of attention in the last few years. Among other things, they can serve as precise indicators for (quantum) phase transitions as well as for detecting topologically ordered phases. We will report on the calculation of entanglement entropies in Quantum Monte Carlo, in particular in the frameworks of Loop Quantum Monte Carlo and Stochastic Series Expansion. We will also discuss approaches for Auxiliary Field Quantum Monte Carlo, which is of special interest in light of recent advances in simulations of fermionic models in the vicinity of the antiferromagnetic phase transition.