Controlling Condensate Collapse and Expansion with an Optical Feshbach Resonance
Abstract
We demonstrate control of the collapse and expansion of an 88Sr Bose-Einstein condensate using an optical Feshbach resonance (OFR) near the 1S0-3P1 intercombination transition at 689 nm. Significant changes in dynamics are caused by modifications of scattering length by up to +- ?10a_bg, where the background scattering length of 88Sr is a_bg = -2a0 (1a0 = 0.053 nm). Changes in scattering length are monitored through changes in the size of the condensate after a time-of-flight measurement. Because the background scattering length is close to zero, blue detuning of the OFR laser with respect to a photoassociative resonance leads to increased interaction energy and a faster condensate expansion, whereas red detuning triggers a collapse of the condensate. The results are modeled with the time-dependent nonlinear Gross-Pitaevskii equation.
Keywords
Cite
@article{arxiv.0906.1837,
title = {Controlling Condensate Collapse and Expansion with an Optical Feshbach Resonance},
author = {Mi Yan and B. J. DeSalvo and B. Ramachandhran and H. Pu and T. C. Killian},
journal= {arXiv preprint arXiv:0906.1837},
year = {2013}
}
Comments
5 pages, 3 figures