Low-temperature properties of the fermionic mixtures with mass imbalance in optical lattice

Nayuta Takemori, Akihis Koga

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We study the attractive Hubbard model with mass imbalance to clarify the low-temperature properties of fermionic mixtures in an optical lattice. By combining dynamical mean-field theory with continuous-time quantum Monte Carlo simulation, we discuss the competition between the superfluid and density wave states at half filling. By calculating the energy and order parameter for each state, we clarify that the coexisting (supersolid) state, where the density wave and superfluid states are degenerate, is realized in the system. We then determine the phase diagram at finite temperatures.

Original languageEnglish
Article number063002
Journaljournal of the physical society of japan
Volume81
Issue number6
DOIs
Publication statusPublished - Jun 1 2012
Externally publishedYes

Keywords

  • Continuous-time Monte Carlo simulation
  • Density wave
  • Mass-imbalanced system
  • Superfluid

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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