Quantum tricriticality at the superfluid-insulator transition of binary bose mixtures

Yasuyuki Kato*, Daisuke Yamamoto, Ippei Danshita

*この研究の対応する著者

研究成果: Article査読

17 被引用数 (Scopus)

抄録

Quantum criticality near a tricritical point is studied in the two-component Bose-Hubbard model on square lattices. The existence of a quantum tricritical point on a boundary of a superfluid-insulator transition is confirmed by quantum Monte Carlo simulations. Moreover, we analytically derive the quantum tricritical behaviors on the basis of an effective field theory. We find two significant features of the quantum tricriticality that are its characteristic chemical potential dependence of the superfluid transition temperature and a strong density fluctuation. We suggest that these features are directly observable in existing experimental setups of Bose-Bose mixtures in optical lattices.

本文言語English
論文番号055301
ジャーナルPhysical Review Letters
112
5
DOI
出版ステータスPublished - 2014 2月 3
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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