期刊
PHYSICS LETTERS A
卷 454, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physleta.2022.128501
关键词
Bose-Einstein condensates; Condensation temperature; s-Wave scattering length; Feshbach resonance
资金
- University of Padova, Italy.
This article discusses the effect of inter-atom interactions on the condensation temperature of an atomic Bose-Einstein condensate and presents an analytic expression for this effect. By studying strongly interacting 39K condensates, it is shown that the tension between mean-field predictions and observations can be resolved by considering the details of the Feshbach resonance used to tune the interactions.
We consider the effect of inter-atom interactions on the condensation temperature Tc of an atomic Bose-Einstein condensate. We find an analytic expression of the shift in Tc induced by interactions with respect the ideal non-interacting case, in the mean-field and semi-classical approximations. Such a shift is expressed in terms of the ratio a/lambda Tc between the s-wave scattering length a and the thermal wavelength lambda Tc. This result is used to discuss the tension between mean-field predictions and observations in strongly interacting 39K condensates. It is shown that such a tension is solved taking into account the details of the Feshbach resonance used to tune a in the experiments.(c) 2022 Elsevier B.V. All rights reserved.
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