上下玻色偶极子的量子磁性和逆流超固体
Quantum magnetism and counterflow supersolidity of up-down bosonic dipoles
摘要：
研究了二维光晶格中的偶极玻色子气体。偶极子被认为是在垂直于晶格平面的上下方向上自由指向。这导致最近邻排斥（吸引）相互作用的对齐（反对齐）偶极子。我们发现的参数区域的系统的基态表现出绝缘相的铁磁或反铁磁有序，以及合理的平均磁化强度值。一个新的逆流超固体量子相的存在的证据也被提出。
英文摘要：
We study a gas of dipolar Bosons confined in a two-dimensional optical lattice. Dipoles are considered to point freely in both up and down directions perpendicular to the lattice plane. This results in a nearest neighbor repulsive (attractive) interaction for aligned (anti-aligned) dipoles. We find regions of parameters where the ground state of the system exhibits insulating phases with ferromagnetic or anti-ferromagnetic ordering, as well as with rational values of the average magnetization. Evidence for the existence of a novel counterflow supersolid quantum phase is also presented.
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