光晶格中的超冷偶极气体：亚稳态的命运
Ultracold dipolar gas in an optical lattice: the fate of metastable states
摘要：
我们研究了超冷偶极玻色子在光晶格中的物理性质。我们发现，偶极-偶极相互作用导致许多绝缘亚稳态的出现。我们使用瞬子理论的推广来研究这些状态的稳定性和寿命。我们还调查的可能性，准备，控制和操纵这些国家使用时间依赖性超晶格的修改和调制。我们表明，从一个亚稳态配置到另一个必然发生通过超流态，但可以完全控制在量子水平上。我们展示了如何在谐波陷阱的存在下，可以创建的亚稳态。我们的发现为亚稳态作为量子存储器的应用开辟了道路。
英文摘要：
We study the physics of ultracold dipolar bosons in optical lattices. We show that dipole-dipole interactions lead to the appearance of many insulating metastable states. We study the stability and lifetime of these states using a generalization of the instanton theory. We investigate also possibilities to prepare, control and manipulate these states using time dependent superlattice modifications and modulations. We show that the transfer from one metastable configuration to another necessarily occurs via superfluid states, but can be controlled fully on the quantum level. We show how the metastable states can be created in the presence of the harmonic trap. Our findings open the way toward applications of the metastable states as quantum memories.
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