Entanglement of Hard‐Core Bosons on the Honeycomb Lattice. Issue 9 (31st July 2019)

• Record Type: Journal Article
• Authors: Zhang, Xue‐Feng; Dillenschneider, Raoul; Eggert, Sebastian
• Other Names: Hillebrands Burkard guestEditor.; Lang Michael guestEditor.; Tutsch Ulrich guestEditor.; Widera Artur guestEditor.; Winter Stephen guestEditor.
• Is Part Of: Physica status solidi. Volume 256:Issue 9(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-07-31
• Subjects: Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201800639
• Languages: English
• ISSNs: 0370-1972

Abstract

Abstract : 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. Abstract : 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.