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arXiv 1401.0686cond-mat.quant-gas
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分子极限下的玻色-费米混合

Bose-Fermi mixtures in the molecular limit

A. Guidini, G. Bertaina, E. Fratini, P. Pieri

摘要:

我们考虑玻色-费米混合物中的费米子和玻色子之间的吸引相互作用的分子极限。对于一个玻色子密度小于或等于费米子密度,我们分析表明如何组成玻色子和费米子的T-矩阵方法恢复预期的物理极限的费米-费米混合物的分子和原子。在这个极限下,我们推导出了自能、动量分布函数和化学势的简单表达式。通过将这些方程扩展到一个被困系统,我们确定了如何调整玻色-费米混合物的实验参数,以增强玻色子动量分布函数上的“间接泡利排斥效应”。对于均匀系统,我们最后给出了一个扩散蒙特卡罗模拟,证实了这种特殊效应的发生。

英文摘要:

We consider a Bose-Fermi mixture in the molecular limit of the attractive interaction between fermions and bosons. For a boson density smaller or equal to the fermion density, we show analytically how a T-matrix approach for the constituent bosons and fermions recovers the expected physical limit of a Fermi-Fermi mixture of molecules and atoms. In this limit, we derive simple expressions for the self-energies, the momentum distribution function, and the chemical potentials. By extending these equations to a trapped system, we determine how to tailor the experimental parameters of a Bose-Fermi mixture in order to enhance the 'indirect Pauli exclusion effect' on the boson momentum distribution function. For the homogeneous system, we present finally a Diffusion Monte Carlo simulation which confirms the occurrence of such a peculiar effect.

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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