Theory of photoemission-type experiment in the BCS-BEC crossover regime of a superfluid Fermi gas

Ryota Watanabe, Shunji Tsuchiya, Yoji Ohashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We theoretically investigate the recent photoemission-type experiment on 40K Fermi gases done by JILA group. Including pairing fluctuations within a strong-coupling T-matrix theory, as well as effects of a harmonic trap within the local density approximation, we calculate photoemission spectra in the BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover region. We show that the energy resolution of the current photoemission experiment is enough to detect the pseudogap phenomenon. We also show how the pseudogap in single-particle excitations continuously changes into the superfluid gap, as one decreases the temperature below the superfluid phase transition temperature. Our results would be useful for the study of single-particle properties of ultracold Fermi gases in the BCS-BEC crossover.

Original languageEnglish
Title of host publicationProceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011
Pages26-31
Number of pages6
DOIs
Publication statusPublished - 2011 Aug 23
Event2011 1st International Symposium on Access Spaces, ISAS 2011 - Yokohama, Japan
Duration: 2011 Jun 172011 Jun 19

Publication series

NameProceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011

Other

Other2011 1st International Symposium on Access Spaces, ISAS 2011
CountryJapan
CityYokohama
Period11/6/1711/6/19

Keywords

  • Atomic Fermi Gas
  • Pseudogap
  • Superfluidity

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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    Watanabe, R., Tsuchiya, S., & Ohashi, Y. (2011). Theory of photoemission-type experiment in the BCS-BEC crossover regime of a superfluid Fermi gas. In Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011 (pp. 26-31). [5960915] (Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011). https://doi.org/10.1109/ISAS.2011.5960915