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 language | English |
|---|---|
| Pages (from-to) | 362-371 |
| Number of pages | 10 |
| Journal | Journal of Russian Laser Research |
| Volume | 32 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2011 Jul |
Fingerprint
Keywords
- heat capacity
- quantum phase transitions
- thermal entanglement
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Engineering (miscellaneous)
Cite this
Heat capacity and entanglement measure in a simple two-qubit model. / Leggio, B.; Napoli, A.; Nakazato, Hiromichi; Messina, A.
In: Journal of Russian Laser Research, Vol. 32, No. 4, 07.2011, p. 362-371.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Heat capacity and entanglement measure in a simple two-qubit model
AU - Leggio, B.
AU - Napoli, A.
AU - Nakazato, Hiromichi
AU - Messina, A.
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
UR - http://www.scopus.com/inward/record.url?scp=80053525641&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053525641&partnerID=8YFLogxK
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 Russian Laser Research
JF - Journal of Russian Laser Research
SN - 1071-2836
IS - 4
ER -