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
Event2011 1st International Symposium on Access Spaces, ISAS 2011 - Yokohama, Japan
Duration: 2011 Jun 172011 Jun 19

Other

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

Fingerprint

Photoemission
Gases
Bose-Einstein condensation
Local density approximation
Experiments
Superconducting transition temperature
Phase transitions
Temperature

Keywords

  • Atomic Fermi Gas
  • Pseudogap
  • Superfluidity

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

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] https://doi.org/10.1109/ISAS.2011.5960915

Theory of photoemission-type experiment in the BCS-BEC crossover regime of a superfluid Fermi gas. / Watanabe, Ryota; Tsuchiya, Shunji; Ohashi, Yoji.

Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011. 2011. p. 26-31 5960915.

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

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., 5960915, pp. 26-31, 2011 1st International Symposium on Access Spaces, ISAS 2011, Yokohama, Japan, 11/6/17. https://doi.org/10.1109/ISAS.2011.5960915
Watanabe R, Tsuchiya S, Ohashi Y. 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. 2011. p. 26-31. 5960915 https://doi.org/10.1109/ISAS.2011.5960915
Watanabe, Ryota ; Tsuchiya, Shunji ; Ohashi, Yoji. / Theory of photoemission-type experiment in the BCS-BEC crossover regime of a superfluid Fermi gas. Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011. 2011. pp. 26-31
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