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ANTONINO MESSINA

HEAT CAPACITY AND ENTANGLEMENT MEASURE IN A SIMPLE TWO-QUBIT MODEL

  • Autori: Leggio, B.; Napoli, A.; Nakazato, H.; Messina, A.
  • Anno di pubblicazione: 2011
  • Tipologia: Articolo in rivista (Articolo in rivista)
  • Parole Chiave: quantum phase transitions, thermal entanglement, heat capacity

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 Wie´sniak, Vedral, and Brukner.

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