ANOMALOUS FLUCTUATIONS OF THE CONDENSATE IN INTERACTING BOSE-GASES

Authors
GIORGINI S PITAEVSKII LP STRINGARI S
Citation
S. Giorgini et al., ANOMALOUS FLUCTUATIONS OF THE CONDENSATE IN INTERACTING BOSE-GASES, Physical review letters, 80(23), 1998, pp. 5040-5043
Citations number
29
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
23
Year of publication
1998
Pages
5040 - 5043
Database
ISI
SICI code
0031-9007(1998)80:23<5040:AFOTCI>2.0.ZU;2-1
Abstract
We find that the fluctuations of the condensate in a weakly interactin g Bose gas confined in a box of volume V follow the law (delta N-0(2)) similar to V-4/3. This anomalous behavior arises from the occurrence of infrared divergencies due to phonon excitations and holds also for strongly correlated Bose superfluids. The analysis is extended to an i nteracting Bose gas confined in a harmonic trap where the fluctuations are found to exhibit a similar anomaly.