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

Yasuyuki Kato*, Daisuke Yamamoto, Ippei Danshita

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


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.

Original languageEnglish
Article number055301
JournalPhysical Review Letters
Issue number5
Publication statusPublished - 2014 Feb 3
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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