三角光晶格中的偶极玻色子：量子相变和反常滞回
Dipolar Bosons in Triangular Optical Lattices: Quantum Phase Transitions and Anomalous Hysteresis
摘要：
研究了偶极玻色子在三角形光晶格中的零温相变和滞回现象。我们发现从超固态到超流态的量子熔化转变是一级的，与以前的报道相反。我们还发现，由于强量子涨落的存在，超固体（或固体）-超流体相变会出现反常的滞后行为，即密度-化学势曲线不形成标准的环结构。此外，我们表明，转变发生单向沿异常滞后曲线。
英文摘要：
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.
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