Two-dimensional pseudogap effects of an ultracold fermi gas in the BCS-BEC crossover region

R. Watanabe, S. Tsuchiya, Yoji Ohashi

Research output: Contribution to journalArticle

Abstract

We investigate pseudogap phenomena originating from pairing fluctuations in the BCS-BEC crossover regime of a two-dimensional Fermi gas in a harmonic trap. Including pairing fluctuations within a T -matrix theory and effects of a trap within the local density approximation, we calculate the local density of states (LDOS) at the superfluid phase transition temperature Tc. In the weak-coupling regime, we show that the pseudogap already appears in LDOS around the trap center. The spatial region where the pseudogap can be seen in LDOS becomes wider for a strong pairing interaction. We also discuss how the pseudogap affects the spectrum of the photoemission-type experiment developed by JILA group.

Original languageEnglish
Pages (from-to)341-347
Number of pages7
JournalJournal of Low Temperature Physics
Volume171
Issue number3-4
DOIs
Publication statusPublished - 2013

Fingerprint

Local density approximation
Photoemission
Superconducting transition temperature
crossovers
Gases
Phase transitions
traps
gases
Experiments
matrix theory
photoelectric emission
transition temperature
harmonics
approximation

Keywords

  • Cold Fermi gas
  • Low-dimensionality
  • Pseudogap

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)

Cite this

Two-dimensional pseudogap effects of an ultracold fermi gas in the BCS-BEC crossover region. / Watanabe, R.; Tsuchiya, S.; Ohashi, Yoji.

In: Journal of Low Temperature Physics, Vol. 171, No. 3-4, 2013, p. 341-347.

Research output: Contribution to journalArticle

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