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Title: Breathing oscillations of a trapped impurity in a Bose gas
Authors: Johnson, T.H.
Bruderer, M.
Cai, Y.
Clark, S.R. 
Bao, W. 
Jaksch, D. 
Issue Date: Apr-2012
Citation: Johnson, T.H., Bruderer, M., Cai, Y., Clark, S.R., Bao, W., Jaksch, D. (2012-04). Breathing oscillations of a trapped impurity in a Bose gas. EPL 98 (2) : -. ScholarBank@NUS Repository.
Abstract: Motivated by a recent experiment (Catani J. et al., Phys. Rev. A, 85 (2012) 023623) we study breathing oscillations in the width of a harmonically trapped impurity interacting with a separately trapped Bose gas. We provide an intuitive physical picture of such dynamics at zero temperature, using a time-dependent variational approach. The amplitudes of breathing oscillations are suppressed by self-trapping, due to interactions with the Bose gas. Further, exciting phonons in the Bose gas leads to damped oscillations and non-Markovian dynamics of the width of the impurity, the degree of which can be engineered through controllable parameters. Our results, supported by simulations, reproduce the main features of the dynamics observed by Catani et al. despite the temperature of that experiment. Moreover, we predict novel effects at lower temperatures due to self-trapping and the inhomogeneity of the trapped Bose gas. © Europhysics Letters Association 2012.
Source Title: EPL
ISSN: 02955075
DOI: 10.1209/0295-5075/98/26001
Appears in Collections:Staff Publications

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