Collective excitations in one-dimensional ultracold Fermi gases: Comparative study

Collective excitations in one-dimensional ultracold Fermi gases: Comparative study
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一维超冷费米气体的集体激发:比较研究

DOI:
10.1103/physrevb.78.195109
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发表时间:
2008-05
期刊:
Phys. Rev. B
影响因子:
--
通讯作者:
高先龙
高先龙
中科院分区:
其他
文献类型:
--
作者:
高先龙

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含时密度泛函理论(TDDFT)是研究非均匀相互作用多体系统非平衡动力学的有力工具。在这里,我们证明了简单的绝热局域自旋密度近似对于描述强关联一维超冷费米气体中的集体密度和自旋动力学是令人惊讶的准确的。我们的结论是基于我们的TDDFT结果与基于自适应含时密度矩阵重整化群方法的精确结果的广泛比较。
Time-dependent density-functional theory (TDDFT) is a powerful tool to study the non-equilibrium dynamics of inhomogeneous interacting many-body systems. Here we show that the simple adiabatic local-spin-density approximation for the time-dependent exchange-correlation potential is surprisingly accurate in describing collective density and spin dynamics in strongly correlated one-dimensional ultracold Fermi gases. Our conclusions are based on extensive comparisons between our TDDFT results and accurate results based on the adaptive time-dependent density-matrix renormalization-group method.
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