Faraday patterns in dipolar Bose-Einstein condensates

Details Faraday patterns in dipolar Bose-Einstein condensates Faraday patterns in dipolar Bose-Einstein condensates

2009-02-23

arxiv.org/abs/0902.3969v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 10 figures

Scientific paper

Faraday patterns can be induced in Bose-Einstein condensates by a periodic modulation of the system nonlinearity. We show that these patterns are remarkably different in dipolar gases with a roton-maxon excitation spectrum. Whereas for non-dipolar gases the pattern size decreases monotonously with the driving frequency, patterns in dipolar gases present, even for shallow roton minima, a highly non trivial frequency dependence characterized by abrupt pattern size transitions, which are especially pronounced when the dipolar interaction is modulated. Faraday patterns constitute hence an optimal tool for revealing the onset of the roton minimum, a major key feature of dipolar gases.

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