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

B. Leggio, A. Napoli, Hiromichi Nakazato, A. Messina

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    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 languageEnglish
    Pages (from-to)362-371
    Number of pages10
    JournalJournal of Russian Laser Research
    Volume32
    Issue number4
    DOIs
    Publication statusPublished - 2011 Jul

    Fingerprint

    Ground state
    Specific heat
    Phase transitions
    specific heat
    markers
    proposals
    ground state

    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 journalArticle

    Leggio, B. ; Napoli, A. ; Nakazato, Hiromichi ; Messina, A. / Heat capacity and entanglement measure in a simple two-qubit model. In: Journal of Russian Laser Research. 2011 ; Vol. 32, No. 4. pp. 362-371.
    @article{d939e126f26e44c294c73f9661c33bec,
    title = "Heat capacity and entanglement measure in a simple two-qubit model",
    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.",
    keywords = "heat capacity, quantum phase transitions, thermal entanglement",
    author = "B. Leggio and A. Napoli and Hiromichi Nakazato and A. Messina",
    year = "2011",
    month = "7",
    doi = "10.1007/s10946-011-9224-0",
    language = "English",
    volume = "32",
    pages = "362--371",
    journal = "Journal of Russian Laser Research",
    issn = "1071-2836",
    publisher = "Springer New York",
    number = "4",

    }

    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 -