Bound entanglement in quantum phase transitions

S. Baghbanzadeh*, S. Alipour, A. T. Rezakhani

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)

Abstract

We investigate quantum phase transitions in which a change in the type of entanglement from bound entanglement to either free entanglement or separability may occur. In particular, we present a theoretical method to construct a class of quantum spin-chain Hamiltonians that exhibit this type of quantum criticality. Given parameter-dependent two-site reduced density matrices (with prescribed entanglement properties), we lay out a reverse construction for a compatible pure state for the whole system, as well as a class of Hamiltonians for which this pure state is a ground state. This construction is illustrated through several examples.

Original languageEnglish
Article number042302
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume81
Issue number4
DOIs
Publication statusPublished - 6 Apr 2010
MoE publication typeA1 Journal article-refereed

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