Single-Particle Properties of a Strongly Interacting Bose–Fermi Mixture Above the BEC Phase Transition Temperature

D. Kharga, Daisuke Inotani, R. Hanai, Yoji Ohashi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We theoretically investigate the normal state properties of a Bose–Fermi mixture with a strong attractive interaction between Fermi and Bose atoms. We extend the ordinary T-matrix approximation (TMA) with respect to Bose–Fermi pairing fluctuations, to include the Hugenholtz–Pines’ relation for all Bose Green’s functions appearing in TMA self-energy diagrams. This extension is shown to be essentially important to correctly describe the physical properties of the Bose–Fermi mixture, especially near the Bose–Einstein condensation instability. Using this improved TMA, we clarify how the formation of composite fermions affects Bose and Fermi single-particle excitation spectra, over the entire interaction strength.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalJournal of Low Temperature Physics
DOIs
Publication statusAccepted/In press - 2017 Jan 30

Keywords

  • BEC
  • Bose–Fermi mixture
  • Single-particle excitations
  • Strong-coupling effects

ASJC Scopus subject areas

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

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