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arXiv 1508.05321cond-mat.quant-gas
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具有杂化$s$和$p$轨道的费米子的超流相

Superfluid phases of fermions with hybridized $s$ and $p$ orbitals

Shaoyu Yin, J. E. Baarsma, M. O. J. Heikkinen, J. -P. Martikainen, P. Törmä

摘要:

我们研究了光晶格中具有杂化轨道的二元费米混合物的超流相。我们表明,存在一个一般的映射这个系统的Lieb格。通过使用简单的多带模型与$s$和$p$ -轨道状态之间的跳跃,我们表明,超流序参量可以有一个$π$ -相位差的晶格位置之间,这是不同于与$s$ -轨道之间的跳跃的情况下。如果调整两种自旋物种之间的布居不平衡,则由于跳跃、相互作用和不平衡之间的相互作用,超流相可以通过各种相演化。我们表明,丰富的行为是可观察的实验实现的系统。

英文摘要:

We explore the superfluid phases of a two-component Fermi mixture with hybridized orbitals in optical lattices. We show that there exists a general mapping of this system to the Lieb lattice. By using simple multiband models with hopping between $s$ and $p$-orbital states, we show that superfluid order parameters can have a $π$-phase difference between lattice sites, which is distinct from the case with hopping between $s$-orbitals. If the population imbalance between the two spin species is tuned, the superfluid phase may evolve through various phases due to the interplay between hopping, interactions and imbalance. We show that the rich behavior is observable in experimentally realizable systems.

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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