caa a22 4500 445858737 CHVBK 20180317145436.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10946-011-9224-0 doi (NATIONALLICENCE)springer-10.1007/s10946-011-9224-0 Heat capacity and entanglement measure in a simple two-qubit model [Elektronische Daten] [B. Leggio, A. Napoli, H. Nakazato, A. Messina] 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. Springer Science+Business Media, Inc., 2011 quantum phase transitions nationallicence thermal entanglement nationallicence heat capacity nationallicence Leggio B. Dipartimento di Fisica, Università di Palermo Via Archirafi 36, 90123, Palermo, Italy aut Napoli A. Dipartimento di Fisica, Università di Palermo Via Archirafi 36, 90123, Palermo, Italy aut Nakazato H. Department of Physics, Waseda University, 169-8555, Tokyo, Japan aut Messina A. Dipartimento di Fisica, Università di Palermo Via Archirafi 36, 90123, Palermo, Italy aut Journal of Russian Laser Research Springer US; http://www.springer-ny.com 32/4(2011-07-01), 362-371 1071-2836 32:4<362 2011 32 10946 https://doi.org/10.1007/s10946-011-9224-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10946-011-9224-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Leggio B. Dipartimento di Fisica, Università di Palermo Via Archirafi 36, 90123, Palermo, Italy aut NATIONALLICENCE 700 1- Napoli A. Dipartimento di Fisica, Università di Palermo Via Archirafi 36, 90123, Palermo, Italy aut NATIONALLICENCE 700 1- Nakazato H. Department of Physics, Waseda University, 169-8555, Tokyo, Japan aut NATIONALLICENCE 700 1- Messina A. Dipartimento di Fisica, Università di Palermo Via Archirafi 36, 90123, Palermo, Italy aut NATIONALLICENCE 773 0- Journal of Russian Laser Research Springer US; http://www.springer-ny.com 32/4(2011-07-01), 362-371 1071-2836 32:4<362 2011 32 10946 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer