On coherence of Bose field | Zendy

Mariusz Gajda | Zendy; Magdalena A. Załuska–Kotur | Zendy; Jan Mostowski | Zendy

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On coherence of Bose field

Author(s) -

Mariusz Gajda,

Magdalena A. Załuska–Kotur,

Jan Mostowski

Publication year - 2001

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.8.000106

Subject(s) - boson , coherence (philosophical gambling strategy) , physics , diagonal , coherence length , quantum mechanics , coherence theory , coherent states , atomic coherence , optics , statistical physics , quantum , laser , mathematics , superconductivity , geometry

We study a system of interacting bosons at zero temperature in an atomic trap. Using wave function that models the ground state of interacting bosons we examine the concepts of the order parameter, off-diagonal order and coherence of the system. We suggest that the coherence length becomes much smaller than the size of the system if the number of trapped particles exceeds a certain limit. This behavior is related to the unavoidable existence of two different length scales -- one determined by the external potential and the second one depending on the two-body forces.

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