Specific heat and effects of strong pairing fluctuations in a superfluid Fermi atom gas in the BCS-BEC crossover region

Pieter Van Wyk, Daisuke Inotani, Yoji Ohashi

Research output: Contribution to journalConference article

Abstract

We theoretically investigate the specific heat at constant volume C V in the BCS(Bardeen-Cooper-Schrieffer)-BEC(Bose-Einstein-condensation)-crossover regime of an ultracold Fermi gas, below the superfluid phase transition temperature T c. Within the strong-coupling framework developed by Nozières and Schmitt-Rink, we show that the temperature dependence of C V drastically changes as one passes through the crossover region, and is sensitive to strong fluctuations in the Cooper channel near the unitarity limit. We also compare our results to a recent experiment on a 6Li unitary Fermi gas. Since fluctuation effects are a crucial key in the BCS-BEC-crossover phenomenon, our results would be helpful in considering how the fermionic BCS superfluid changes into BEC with increasing the interaction strength, from the viewpoint of specific heat.

Original languageEnglish
Article number012013
JournalJournal of Physics: Conference Series
Volume969
Issue number1
DOIs
Publication statusPublished - 2018 Apr 19
Event28th International Conference on Low Temperature Physics, LT 2018 - Gothenburg, Sweden
Duration: 2017 Aug 92017 Aug 16

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crossovers
specific heat
gases
atoms
condensation
transition temperature
temperature dependence
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Specific heat and effects of strong pairing fluctuations in a superfluid Fermi atom gas in the BCS-BEC crossover region. / Van Wyk, Pieter; Inotani, Daisuke; Ohashi, Yoji.

In: Journal of Physics: Conference Series, Vol. 969, No. 1, 012013, 19.04.2018.

Research output: Contribution to journalConference article

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