Anomalous behavior of Bose condensate in external fields.

✍ Scribed by Y.A. Nepomnyashchy; L.P. Pitaevskii

• Book ID: 103940489
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 130 KB
• Volume: 194-196
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(94)90601-7

✦ Synopsis

We obtain exact equation for the condensate wave function of the Bose liquid. Unlike the approximate Gross-Pitaevskii equation [1] it reflects the infrared anomaly -the special manifestation of the broken gauge symmetry which is connected with ,ero and thermal vibrations [2][3][4]. We find the exact (in longwave limit} solution of the equation in the static external field which describes nonlocal (long-range} response of the condensate density to the local static perturbation {unlike the case of the total density whose response is local). The effect appears even in case of the usual (gauge invariant} field (in second order}.