Normal-state properties of a unitary Bose–Fermi mixture: A combined strong-coupling approach with universal thermodynamics

Digvijay Kharga, Hiroyuki Tajima, Pieter Van Wyk, Daisuke Inotani, Yoji Ohashi

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We theoretically investigate normal-state properties of a unitary Bose–Fermi mixture. Including strong hetero-pairing fluctuations, we evaluate the Bose and Fermi chemical potential, internal energy, pressure, entropy, as well as specific heat at constant volume CV, within the framework of a combined strong-coupling theory with exact thermodynamic identities. We show that hetero-pairing fluctuations at the unitarity cause non-monotonic temperature dependence of CV, being qualitatively different from the monotonic behavior of this quantity in the weak- and strong-coupling limit. On the other hand, such an anomalous behavior is not seen in the other quantities. Our results indicate that the specific heat CV, which has recently become observable in cold atom physics, is a useful quantity for understanding strong-coupling aspects of this quantum system.

Original languageEnglish
Article number074302
JournalJournal of the Physical Society of Japan
Issue number7
Publication statusPublished - 2017 Jul 15


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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