Entanglement of Hard-Core Bosons in Bipartite Lattices

Abstract

The entanglement of hard-core bosons in square and honeycomb lattices with nearest-neighbor 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.

6 pages, 4 figures. For more information see https://www.physik.uni-kl.de/eggert/papers/index.html

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