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arXiv 0912.3476cond-mat.quant-gascond-mat.str-el
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强相互作用费米子气体单粒子谱的动力学团簇量子蒙特卡罗研究

Dynamical Cluster Quantum Monte Carlo Study of the Single Particle Spectra of Strongly Interacting Fermion Gases

Shi-Quan Su, Daniel E. Sheehy, Juana Moreno, Mark Jarrell

摘要:

本文研究了三维引力哈伯德模型在稀极限下描述的么正态下共振相互作用费米子的单粒子谱函数。我们的方法,基于动态集群近似和最大熵方法,显示了出现的差距,随着温度的降低,在最近的冷原子光电发射实验报告,跨越BEC-BCS交叉耦合值。通过比较光谱函数的行为的虚时间动力学配对磁化率,我们属性的发展的差距,形成本地绑定原子对。

英文摘要:

We study the single-particle spectral function of resonantly-interacting fermions in the unitary regime, as described by the three-dimensional attractive Hubbard model in the dilute limit. Our approach, based on the Dynamical Cluster Approximation and the Maximum Entropy Method, shows the emergence of a gap with decreasing temperature, as reported in recent cold-atom photoemission experiments, for coupling values that span the BEC-BCS crossover. By comparing the behavior of the spectral function to that of the imaginary time dynamical pairing susceptibility, we attribute the development of the gap to the formation of local bound atom pairs.

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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