First-order phase transition and anomalous hysteresis of binary bose mixtures in an optical lattice

Daisuke Yamamoto, Takeshi Ozaki, Carlos A R Sá De Melo, Ippei Danshita

Research output: Contribution to journalArticle

Abstract

We study a first-order phase transition between superfluid and Mott insulator phases in binary Bose mixtures loaded into a hypercubic optical lattice. The system is described by a two-component Bose-Hubbard model. Considering the difference between the two kinds of bosons in the intra-component interaction strength, we discuss the metastability of the system and the hysteresis associated with the first-order superfluid-Mott insulator transition. It is found that the sweeping of hopping amplitude induces a conventional hysteresis-loop behavior. We also find an anomalous hysteresis behavior when the chemical potential is varied. In the anomalous hysteresis, the phase transition occurs in a unidirectional way and a hysteresis loop does not form.

Original languageEnglish
Pages (from-to)258-264
Number of pages7
JournalJournal of Low Temperature Physics
Volume175
Issue number1-2
DOIs
Publication statusPublished - 2014
Externally publishedYes

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Keywords

  • Anomalous hysteresis
  • Bose-Hubbard model
  • First-order phase transition

ASJC Scopus subject areas

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

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