Heat capacity and entanglement measure in a simple two-qubit model

B. Leggio, A. Napoli, H. Nakazato, A. Messina

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A simple two-qubit model showing quantum phase transitions as a consequence of ground-state-level crossings is studied in detail. Using the system's concurrence as an entanglement measure and heat capacity as a marker of thermodynamical properties, we obtain an analytical expression giving the latter in terms of the former. A protocol allowing an experimental measure of entanglement is then presented and compared with a related proposal recently reported by Wieśniak, Vedral, and Brukner.

Original languageEnglish
Pages (from-to)362-371
Number of pages10
JournalJournal of Russian Laser Research
Volume32
Issue number4
DOIs
Publication statusPublished - 2011 Jul 1

Keywords

  • heat capacity
  • quantum phase transitions
  • thermal entanglement

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)

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