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

[摘要] 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.

[发布日期] 2004-12-21