Spin-charge separation in cold Fermi-gases: a real time analysis

Details Spin-charge separation in cold Fermi-gases: a real time analysis Spin-charge separation in cold Fermi-gases: a real time analysis

2005-04-12

arxiv.org/abs/cond-mat/0504299v2

Phys. Rev. Lett. 95, 176401 (2005)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevLett.95.176401

Using the adaptive time-dependent density-matrix renormalization group method for the 1D Hubbard model, the splitting of local perturbations into separate wave packets carrying charge and spin is observed in real-time. We show the robustness of this separation beyond the low-energy Luttinger liquid theory by studying the time-evolution of single particle excitations and density wave packets. A striking signature of spin-charge separation is found in 1D cold Fermi gases in a harmonic trap at the boundary between liquid and Mott-insulating phases. We give quantitative estimates for an experimental observation of spin-charge separation in an array of atomic wires.

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