Dynamic response of strongly correlated Fermi gases in the quantum virial expansion

Dynamic response of strongly correlated Fermi gases in the quantum virial expansion
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量子维里展开中强相关费米气体的动态响应

DOI:
10.1103/physreva.81.033630
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发表时间:
2010-03
期刊:
影响因子:
2.9
通讯作者:
Liu, Xia-Ji
Liu, Xia-Ji
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hu, Hui;Drummond, Peter D.;Liu, Xia-Ji

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通过发展量子维里展开理论,我们定量计算了高温下强相互作用费米气体的动力学密度响应函数。一个明确的过渡,从原子到分子的反应是确定在光谱交叉时,从BCS到BEC制度,在定性协议与最近的布拉格光谱观测。我们的维里展开方法为解决强耦合问题提供了一种很有前途的方法,并适用于强关联费米气体的其他动力学性质。
By developing a quantum virial expansion theory, we quantitatively calculate the dynamic density response function of a trapped strongly interacting Fermi gas at high temperatures near unitarity. A clear transition from atomic to molecular responses is identified in the spectra when crossing from the BCS to BEC regimes, in qualitative agreement with recent Bragg spectroscopy observations. Our virial expansion method provides a promising way to solve the challenging strong-coupling problems and is applicable to other dynamical properties of strongly correlated Fermi gases.
DOI: 10.1017/cbo9780511524257
发表时间: 1993-08
期刊: --
影响因子: --
作者:
A. Griffin
通讯作者: A. Griffin