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

doi:10.1007/s10909-013-0989-0

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 journal › Article › peer-review

1 Citation (Scopus)

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 language	English
Pages (from-to)	258-264
Number of pages	7
Journal	Journal of Low Temperature Physics
Volume	175
Issue number	1-2
DOIs	https://doi.org/10.1007/s10909-013-0989-0
Publication status	Published - 2014
Externally published	Yes

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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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.",

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T1 - First-order phase transition and anomalous hysteresis of binary bose mixtures in an optical lattice

AU - Yamamoto, Daisuke

AU - Ozaki, Takeshi

AU - Sá De Melo, Carlos A R

AU - Danshita, Ippei

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

KW - Anomalous hysteresis

KW - Bose-Hubbard model

KW - First-order phase transition

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

Abstract

Keywords

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