Bragg spectroscopy of an accelerating condensate with solitary-wave behaviour

Details Bragg spectroscopy of an accelerating condensate with solitary-wave behaviour Bragg spectroscopy of an accelerating condensate with solitary-wave behaviour

2004-10-07

arxiv.org/abs/cond-mat/0410168v1

Phys. Rev. A 71, 033620 (2005)

Physics

Condensed Matter

Other Condensed Matter

9 pages, 3 figures

Scientific paper

10.1103/PhysRevA.71.033620

We present a theoretical treatment of Bragg spectroscopy of an accelerating condensate in a solitary-wave state. Our treatment is based on the Gross-Pitaevskii equation with an optical potential representing the Bragg pulse and an additional external time-dependent potential generating the solitary-wave behaviour. By transforming to a frame translating with the condensate, we derive an approximate set of equations that can be readily solved to generate approximate Bragg spectra. Our analytic method is accurate within a well defined parameter regime and provides physical insight into the structure of the spectra. We illustrate our formalism using the example of Bragg spectroscopy of a condensate in a time-averaged orbiting potential trap.

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