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Isaac Newton Institute for Mathematical Sciences

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

Presenter: Antonino Messina (University of Palermo)

Co-authors: B. Leggio ( University of Palermo), A. Napoli ( University of Palermo), H. Nakazato (Waseda University, Tokyo)

Abstract

ABSTRACT: A simple two-qubit model showing Quantum Phase Transitions as a consequence of ground state level crossings is studied in detail. Using the Concurrence of the system as an entanglement measure and heat capacity as a marker of thermodynamical properties, an analytical expression giving the latter in terms of the former is obtained. 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