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arXiv 2005.05457cond-mat.quant-gas
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多组分费米子的平带诱导非费米液体行为

Flat band induced non-Fermi liquid behavior of multicomponent fermions

Pramod Kumar, Sebastiano Peotta, Yosuke Takasu, Yoshiro Takahashi, Päivi Törmä

摘要:

我们研究多组分费米子在一个平带和预测实验签名的非费米液体行为。我们利用动力学平均场论计算了$\mathcal{N} = 2$和$\mathcal{N} = 4$组分在Lieb晶格中的密度、双占据率和熵.我们推导了不同$\mathcal{N}$值下的平均场标度关系,并研究了由于超平均场效应而导致的击穿。预测的特征发生在高于内尔温度的温度下,并且在存在谐波捕获势的情况下持续存在,因此它们可以用当前的超冷气体实验观察到。

英文摘要:

We investigate multicomponent fermions in a flat band and predict experimental signatures of non-Fermi liquid behavior. We use dynamical mean-field theory to obtain the density, double occupancy and entropy in a Lieb lattice for $\mathcal{N} = 2$ and $\mathcal{N} = 4$ components. We derive a mean-field scaling relation between the results for different values of $\mathcal{N}$, and study its breakdown due to beyond-mean field effects. The predicted signatures occur at temperatures above the Néel temperature and persist in presence of a harmonic trapping potential, thus they are observable with current ultracold gas experiments.

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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