Ground-state reference systems for expanding correlated fermions in one dimension

F. Heidrich-Meisner, M. Rigol, A. Muramatsu, A. E. Feiguin, E. Dagotto

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

We study the sudden expansion of strongly correlated fermions in a one-dimensional lattice, utilizing the time-dependent density-matrix renormalization group method. Our focus is on the behavior of experimental observables such as the density, the momentum distribution function, and the density and spin structure factors. As our main result, we show that correlations in the transient regime can be accurately described by equilibrium reference systems. In addition, we find that the expansion from a Mott insulator produces distinctive peaks in the momentum distribution function at k±π/2, accompanied by the onset of power-law correlations.

Original languageEnglish (US)
Article number013620
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume78
Issue number1
DOIs
StatePublished - Jul 17 2008

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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