Berlin 2012 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 16: Correlated Electrons: Low-dimensional Systems - Models 2

TT 16.12: Vortrag

Dienstag, 27. März 2012, 12:30–12:45, H 0104

Entanglement of hard-core bosons in bipartite lattices — •Raoul Dillenschneider, Xue-Feng Zhang, and Sebastian Eggert — Physics Dept. and Res. Center OPTIMAS, Univ. of Kaiserslautern, 67663 Kaiserslautern, Germany.

The entanglement of hard-core bosons in square and honeycomb lattices with Coulomb interactions is estimated by means of quantum Monte Carlo simulations and spin-wave analysis. The particular U(1)-invariant form of the concurrence is used to establish a connection with observables such as density and superfluid density. For specific regimes the concurrence is expressed as a combination of boson density and superfluid density. Symmetry breaking is demonstrated characterizing entanglement patterns.