Decoherence and dephasing in strongly driven colliding Bose-Einstein condensates
Abstract
We report on a series of measurements of decoherence and wavepacket dephasing between two colliding, strongly coupled, identical Bose-Einstein condensates. We measure, in the strong excitation regime, a suppression of the mean-field shift, compared to the shift which is observed for a weak excitation. This suppression is explained by applying the Gross-Pitaevskii energy functional. By selectively counting only the non-decohered fraction in a time of flight image we observe oscillations for which both inhomogeneous and Doppler broadening are suppressed, in quantitative agreement with a full Gross-Pitaevskii equation simulation. If no post selection is used, the decoherence rate due to collisions can be extracted, and is in agreement with the local density average calculated rate.
Cite
@article{arxiv.cond-mat/0308492,
title = {Decoherence and dephasing in strongly driven colliding Bose-Einstein condensates},
author = {N. Katz and R. Ozeri and E. Rowen and E. Gershnabel and N. Davidson},
journal= {arXiv preprint arXiv:cond-mat/0308492},
year = {2009}
}
Comments
4 pages, 5 figures