Coherence and correlation properties of a one-dimensional attractive Fermi gas

Year: 2004

Authors: Carusotto I., Castin Y.

Autors Affiliation: Ecole Normale Super, Lab Kastler Brossel, F-75231 Paris 05, France; Univ Trent, INFM, CRS BEC, I-38050 Trento, Italy; Univ Trent, Dipartimento Fis, I-38050 Trento, Italy.

Abstract: A recently developed quantum Monte Carlo algorithm based on the stochastic evolution of Hartree-Fock state has been applied to compute the static correlation functions of a one-dimensional model of attractively interacting two component fermions. The numerical results have been extensively compared to existing approximate approaches. The crossover to a condensate of pairs can be identified as the first-order pair coherence extending throughout the whole size of the system. The possibility of revealing the onset of the transition with other observables such as the density-density correlations or the second-order momentum space correlations is discussed. (C) 2004 Elsevier B.V. All rights reserved.

Journal/Review: OPTICS COMMUNICATIONS

Volume: 243 (1-6)      Pages from: 81  to: 106

KeyWords: 2-dimensional Hubbard-model; Quantum Monte-carlo; Spin Gap; Superconductivity; Condensation; Atoms; State; Molecules
DOI: 10.1016/j.optcom.2004.04.062

Citations: 10
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