Dipolar bosons in triangular optical lattices: Quantum phase transitions and anomalous hysteresis

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

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Abstract

We study phase transitions and hysteresis in a system of dipolar bosons loaded into triangular optical lattices at zero temperature. We find that the quantum melting transition from supersolid to superfluid phase is first order, in contrast with the previous report. We also find that due to strong quantum fluctuations the supersolid (or solid)-superfluid transition can exhibit an anomalous hysteretic behavior, in which the curve of density versus chemical potential does not form a standard loop structure. Furthermore, we show that the transition occurs unidirectionally along the anomalous hysteresis curve.

Original languageEnglish
Article number021601
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume85
Issue number2
DOIs
Publication statusPublished - 2012 Feb 3

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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