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Anisotropy in s-wave Bose-Einstein condensate collisions and its relationship to superradiance
- Source :
- Phys. Rev. A 90, 033613 (2014)
- Publication Year :
- 2014
-
Abstract
- We report the experimental realization of a single-species atomic four-wave mixing process with BEC collisions for which the angular distribution of scattered atom pairs is not isotropic, despite the collisions being in the $s$-wave regime. Theoretical analysis indicates that this anomalous behavior can be explained by the anisotropic nature of the gain in the medium. There are two competing anisotropic processes: classical trajectory deflections due to the mean-field potential, and Bose enhanced scattering which bears similarity to super-radiance. We analyse the relative importance of these processes in the dynamical buildup of the anisotropic density distribution of scattered atoms, and compare to optically pumped super-radiance.<br />Comment: 13 pages, 10 figures, added a fuller discussion of timescales, otherwise some minor changes in the text and the formatting of Figures 5-7
- Subjects :
- Condensed Matter - Quantum Gases
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. A 90, 033613 (2014)
- Publication Type :
- Report
- Accession number :
- edsarx.1406.1327
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevA.90.033613