Journal
PHYSICS LETTERS A
Volume 373, Issue 33, Pages 2973-2978Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2009.06.022
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Funding
- Einstein Center of Weizmann Institute
- ISF [286/04]
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Bose gas in a random external field is considered. The effective action both for weak and strong random fields, compared with the interaction between particles, is derived in the framework of the path integral Keldysh-Schwinger technique. Using this effective action the properties of the system in strongly fluctuating random field are analyzed. Used approximation shows a gap in the chemical potential, when it flows from negative to positive values. (c) 2009 Elsevier B.V. All rights reserved.
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