Spin-Charge Separation in Cold Fermi Gases: A Real Time Analysis

C. Kollath, U. Schollwöck, and W. Zwerger
Phys. Rev. Lett. 95, 176401 – Published 17 October 2005

Abstract

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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  • Received 12 April 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.176401

©2005 American Physical Society

Authors & Affiliations

C. Kollath1, U. Schollwöck1, and W. Zwerger2

  • 1Institute for Theoretical Physics C, RWTH Aachen, D-52056 Aachen, Germany
  • 2Physics Department, Technical University Munich, D-85748 Garching, Germany

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Issue

Vol. 95, Iss. 17 — 21 October 2005

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