光晶格中超冷费米气体的带间物理
Interband physics in an ultra-cold Fermi gas in an optical lattice
摘要：
我们研究了在光晶格中，当激发态p带被布居时，强极化冷费米子气体的性质。我们推导出相关的哈密顿量，并讨论了排斥和吸引相互作用的预期相图。在这里所涵盖的参数制度，棋盘式反铁磁订购被发现是可能的排斥相互作用，而吸引力的相互作用，不同类型的配对相位之间的过渡预测。
英文摘要：
We study a gas of strongly polarized cold fermions in an optical lattice when the excited p-bands are populated. We derive the relevant Hamiltonian and discuss the expected phase diagram for both repulsive and attractive interactions. In the parameter regime covered here, checkerboard anti-ferromagnetic ordering is found to be possible for repulsive interactions while for attractive interactions, transitions between different types of paired phases are predicted.
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