{
  "id": "cond-mat/0402448",
  "version": "v2",
  "published": "2004-02-17T16:09:54.000Z",
  "updated": "2004-03-11T11:03:37.000Z",
  "title": "An exactly solvable model of the BCS-BEC crossover",
  "authors": [
    "J. N. Fuchs",
    "A. Recati",
    "W. Zwerger"
  ],
  "comment": "corrected typos, minor modifications, submitted version",
  "journal": "Phys. Rev. Lett. 93, 090408 (2004).",
  "doi": "10.1103/PhysRevLett.93.090408",
  "categories": [
    "cond-mat.stat-mech",
    "cond-mat.supr-con"
  ],
  "abstract": "We discuss an integrable model of interacting Fermions in one dimension, that allows an exact description of the crossover from a BCS- to a Bose-like superfluid. This model bridges the Gaudin-Yang model of attractive spin 1/2 Fermions to the Lieb-Liniger model of repulsive Bosons. Using a geometric resonance in the one-dimensional scattering length, the inverse coupling constant varies from minus infinity to plus infinity while the system evolves from a BCS-like state through a Tonks gas to a weakly interacting Bose gas of dimers. We study the ground state energy, the elementary density and spin excitations, and the correlation functions. An experimental realization with cold atoms of such a one-dimensional BCS-BEC crossover is proposed.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2004-03-11T11:03:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "exactly solvable model",
      "one-dimensional bcs-bec crossover",
      "ground state energy",
      "inverse coupling constant varies",
      "cold atoms"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}