{
  "id": "cond-mat/0105339",
  "version": "v2",
  "published": "2001-05-17T06:35:13.000Z",
  "updated": "2001-11-30T20:47:35.000Z",
  "title": "The kinetic and interaction energies of a trapped Bose gas: Beyond the mean field",
  "authors": [
    "A. Yu. Cherny",
    "A. A. Shanenko"
  ],
  "comment": "5 pages, REVTeX, 1 figure inserted",
  "journal": "Phys. Lett. A 293, No 5-6, 287 (2002).",
  "doi": "10.1016/S0375-9601(02)00017-8",
  "categories": [
    "cond-mat.stat-mech"
  ],
  "abstract": "The kinetic and interaction energies of a three-dimensional dilute ground-state Bose gas confined in a trap are calculated beyond a mean-field treatment. They are found to depend on the pairwise interaction trough two characteristic lengths: the first, a, is the well-known scattering length and the second, b, is related to the latter by b=a-\\lambda d a/d\\lambda with \\lambda being the coupling constant. Numerical estimations show that the pairwise interaction energy of a dilute gas of alkali atoms in a trap is negative (in spite of the positive scattering length); its absolute value is found by about the order of magnitude larger than that of the mean-field interaction energy that corresponds to the last term in the Gross-Pitaevskii functional.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2001-11-30T20:47:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "interaction energy",
      "trapped bose gas",
      "mean field",
      "three-dimensional dilute ground-state bose gas",
      "scattering length"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "RevTeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}