TY - JOUR
T1 - Heat capacity and entanglement measure in a simple two-qubit model
AU - Leggio, B.
AU - Napoli, A.
AU - Nakazato, H.
AU - Messina, A.
N1 - Funding Information:
H.N. acknowledges support from JSPS, Japan through a Grant-in-Aid for Scientific Research (C).
PY - 2011/7
Y1 - 2011/7
N2 - 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.
AB - 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.
KW - heat capacity
KW - quantum phase transitions
KW - thermal entanglement
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U2 - 10.1007/s10946-011-9224-0
DO - 10.1007/s10946-011-9224-0
M3 - Article
AN - SCOPUS:80053525641
VL - 32
SP - 362
EP - 371
JO - Journal of Soviet Laser Research
JF - Journal of Soviet Laser Research
SN - 1071-2836
IS - 4
ER -