In this short review we present our recent results concerning the rotation of atomic Bose-Einstein condensates confined in quadratic or quartic potentials, and give an overview of the field. We first describe the procedure used to set an atomic gas in rotation and briefly discuss the physics of cond
Bose-Einstein condensation in the early universe
β Scribed by M. Morikawa
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 135 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0003-3804
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β¦ Synopsis
By introducing the Bose-Einstein condensation dynamics (BEC), we develop a unified model of dark energy and dark matter . The two phases of BEC (= dark energy) and normal gas (=dark matter) transform with each other through the phase transition. We study the present mild acceleration, the inflation in the early universe, and the reduction of the cosmological constant. We find the stagflation regime when the cosmic expansion stops and the uniform mode of BEC becomes unstable. We also comment on the possibility that BEC generation/decay series might have continued all the time in the cosmic history from the inflation to present.
π SIMILAR VOLUMES
A survey is given of the present state of the art in studying Bose-Einstein condensation of dilute atomic gases. The bulk of attention is focused on the principal theoretical problems, though the related experiments are also mentioned. Both uniform and nonuniform trapped gases are considered. Existi
We have studied a Bose-Einstein condensate of 87 Rb atoms under an oscillatory excitation. For a fixed frequency of excitation, we have explored how the values of amplitude and time of excitation must be combined in order to produce quantum turbulence in the condensate. Depending on the combination