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

Type: Article

Publication Date: 2008-11-11

Citations: 29

DOI: https://doi.org/10.1103/physrevb.78.195109

Abstract

Time-dependent density-functional theory (TDDFT) is a powerful tool in studying the nonequilibrium 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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