Entanglement of Hard‐Core Bosons on the Honeycomb Lattice

The entanglement of hard‐core bosons in square and honeycomb lattices with nearest‐neighbor interactions is estimated by means of quantum Monte Carlo (QMC) simulations and spin‐wave (SW) analysis. The particular U(1)‐invariant form of the concurrence is used to establish a connection with observable...

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Bibliographic Details
Published inphysica status solidi (b) Vol. 256; no. 9
Main Authors Zhang, Xue‐Feng, Dillenschneider, Raoul, Eggert, Sebastian
Format Journal Article
LanguageEnglish
Published 01.09.2019
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Summary:The entanglement of hard‐core bosons in square and honeycomb lattices with nearest‐neighbor interactions is estimated by means of quantum Monte Carlo (QMC) simulations and spin‐wave (SW) 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. The quantum information theory is widely used for studying the quantum phase transition of the quantum many‐body systems. The quantum information witness plays a similar role as the order parameter but the connection between them is still unclear. By numerical and analytical studying the hard‐core bosons model, the authors establish the relation between concurrence and the quantum observables.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.201800639