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arXiv 2003.06095cond-mat.quant-gas
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强相互作用二维费米气体的赝能隙区

Pseudogap regime of a strongly interacting two-dimensional Fermi gas with and without confinement-induced effect range of interactions

Brendan C. Mulkerin, Xia-Ji Liu, Hui Hu

摘要:

本文从理论上研究了具有和不具有负约束诱导有效射程的强关联二维费米气体的多体配对。利用强耦合有效场论,我们证明了定容比热可以作为二维费米液体到赝能隙态跃迁的特征指标.我们计算的赝隙形成温度,通过在恒定体积下的比热,检查一个负的约束诱导的有效范围上的超流转变以上的多体配对的作用。我们比较我们的结果与有效范围和没有最近的实验测量与射频光谱在Murthy等人。[Science359,452-455(2018)]。虽然一个很好的定性协议被发现,我们无法区分的约束引起的影响范围内的实验数据。

英文摘要:

We investigate theoretically the many-body pairing of a strongly correlated two-dimensional Fermi gas with and without negative confinement-induced effective range. Using a strong-coupling effective field theory in the normal state, we show that the specific heat at constant volume can be used as a characteristic indicator of the crossover from the normal Fermi liquid to the pseudogap state in two dimensions. We calculate the pseudogap formation temperature through the specific heat at constant volume, examining the role of a negative confinement-induced effective range on many-body pairing above the superfluid transition. We compare our results with and without effective range to the recent experimental measurement performed with radio-frequency spectroscopy in Murthy et al.[Science359, 452-455 (2018)]. Although a good qualitative agreement is found, we are not able to discriminate the effect of the confinement-induced effect range in the experimental data.

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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