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光晶格中的费米子穿过费什巴赫共振

Fermions in Optical Lattices across Feshbach Resonance

Roberto B. Diener, Tin-Lun Ho

摘要:

我们指出,最近的实验在ETH \cite{Esslinger}的费米子在光晶格中,带绝缘体不断演变成占据许多频带的状态,作为系统被扫过费什巴赫共振,具有广泛的凝聚态的基本问题的影响。我们导出了这些系统的有效哈密顿量,得到了它们的能量和能带布居的表达式,并指出了在绝热扫描过程中基态的量子纠缠的增加。我们的结果也解释了为什么只有特定的区域在$k$ -空间可以填充扫描后发现,在参考\cite{Esslinger}。

英文摘要:

We point out that the recent experiments at ETH \cite{Esslinger} on fermions in optical lattices, where a band insulator evolves continuously into states occupying many bands as the system is swept adiabatically across Feshbach resonance, have implications on a wide range of fundamental issues in condensed matter. We derive the effective Hamiltonian of these systems, obtain expressions for their energies and band populations, and point out the increasing quantum entanglement of the ground state during the adiabatic sweep. Our results also explains why only specific regions in $k$-space can be populated after the sweep as found in ref. \cite{Esslinger}.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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