Pairing fluctuations and pseudogap effects in the BCS-BEC crossover regime of a superfluid Fermi gas

R. Watanabe, S. Tsuchiya, Yoji Ohashi

Research output: Contribution to journalArticle

Abstract

We study effects of strong pairing fluctuations on single-particle properties of a superfluid Fermi gas in the BCS-BEC crossover region. Including phase and amplitude fluctuations of the order parameter within the T-matrix approximation, we calculate the superfluid density of states below the superfluid phase transition temperature Tc. We show how the pseudogap appearing in the normal phase above Tc changes into the superfluid gap over the entire BCS-BEC crossover region, as one passes through Tc.

Original languageEnglish
JournalPhysica C: Superconductivity and its Applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2010 Dec

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Superconducting transition temperature
crossovers
Gases
Phase transitions
gases
transition temperature
approximation

Keywords

  • Atomic Fermi gas
  • BCS-BEC crossover
  • Pseudogap
  • Superfluid

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials

Cite this

Pairing fluctuations and pseudogap effects in the BCS-BEC crossover regime of a superfluid Fermi gas. / Watanabe, R.; Tsuchiya, S.; Ohashi, Yoji.

In: Physica C: Superconductivity and its Applications, Vol. 470, No. SUPPL.1, 12.2010.

Research output: Contribution to journalArticle

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