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摘要翻译：
我们研究了一个两物种玻色-哈伯德模型的相图，其中包含了一个转换项，利用这个转换项，第一物种的两个粒子可以转换成第二物种的一个粒子，反之亦然。该模型可以与超冷原子实验相联系，在超冷原子实验中，Feshbach共振产生长寿命束缚态，被视为双原子分子。通过量子蒙特卡罗模拟，对模型进行了精确求解。我们表明，根据参数，发生了“种群倒置”，即第二个物种比第一个物种数量更多。该模型还显示了一个奇异的不可压缩“超级莫特”阶段，在这个阶段中，来自两个物种的粒子都可以以超流的迹象流动，但没有全局超流。我们给出了两个相图，一个在（化学势，转换）平面，另一个在（化学势，失谐）平面。
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英文标题：
《Quantum phases of mixtures of atoms and molecules on optical lattices》
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作者：
V.G. Rousseau and P.J.H. Denteneer
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
We investigate the phase diagram of a two-species Bose-Hubbard model including a conversion term, by which two particles from the first species can be converted into one particle of the second species, and vice-versa. The model can be related to ultra-cold atom experiments in which a Feshbach resonance produces long-lived bound states viewed as diatomic molecules. The model is solved exactly by means of Quantum Monte Carlo simulations. We show than an "inversion of population" occurs, depending on the parameters, where the second species becomes more numerous than the first species. The model also exhibits an exotic incompressible "Super-Mott" phase where the particles from both species can flow with signs of superfluidity, but without global supercurrent. We present two phase diagrams, one in the (chemical potential, conversion) plane, the other in the (chemical potential, detuning) plane.
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PDF链接：
https://arxiv.org/pdf/710.222
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