Pseudogap phenomenon in an ultracold Fermi gas with a p-wave interaction

Daisuke Inotani, Ryota Watanabe, Manfred Sigrist, Yoji Ohashi

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

Abstract

We investigate fluctuation effects in a single-component ultracold Fermi gas with a p-wave interaction. Within the framework of a strong-coupling T-matrix theory, we calculate the single-particle density of states (DOS) at the superfluid phase transition temperature Tc. Starting from the weak-coupling regime, we show that the so-called pseudogap structure develops in DOS, with increasing the strength of a pairing interaction. However, in contrast to the case of s-wave interaction (where the pseudogap size in DOS monotonically increases with increasing the interaction strength), the pseudogap structure is found to gradually disappear in the strong-coupling regime. We point out that this non-monotonic behavior of pseudogap originates from the momentum dependence of p-wave interaction. Our results clarify how the symmetry of pairing interaction affects pseudogap phenomena in strongly correlated fermion systems.

Original languageEnglish
Title of host publicationProceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011
Pages23-25
Number of pages3
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

Gases
Fermions
Superconducting transition temperature
Momentum
Phase transitions

Keywords

  • Pseudogap
  • Superfluidity
  • Ultracold Fermi gas

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

Inotani, D., Watanabe, R., Sigrist, M., & Ohashi, Y. (2011). Pseudogap phenomenon in an ultracold Fermi gas with a p-wave interaction. In Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011 (pp. 23-25). [5960914] https://doi.org/10.1109/ISAS.2011.5960914

Pseudogap phenomenon in an ultracold Fermi gas with a p-wave interaction. / Inotani, Daisuke; Watanabe, Ryota; Sigrist, Manfred; Ohashi, Yoji.

Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011. 2011. p. 23-25 5960914.

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

Inotani, D, Watanabe, R, Sigrist, M & Ohashi, Y 2011, Pseudogap phenomenon in an ultracold Fermi gas with a p-wave interaction. in Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011., 5960914, pp. 23-25, 2011 1st International Symposium on Access Spaces, ISAS 2011, Yokohama, Japan, 11/6/17. https://doi.org/10.1109/ISAS.2011.5960914
Inotani D, Watanabe R, Sigrist M, Ohashi Y. Pseudogap phenomenon in an ultracold Fermi gas with a p-wave interaction. In Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011. 2011. p. 23-25. 5960914 https://doi.org/10.1109/ISAS.2011.5960914
Inotani, Daisuke ; Watanabe, Ryota ; Sigrist, Manfred ; Ohashi, Yoji. / Pseudogap phenomenon in an ultracold Fermi gas with a p-wave interaction. Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011. 2011. pp. 23-25
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