Publikation: Breathing oscillations of a trapped impurity in a Bose gas
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2012
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EPL (Europhysics Letters). 2012, 98(2), 26001. ISSN 0295-5075. eISSN 1286-4854. Available under: doi: 10.1209/0295-5075/98/26001
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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.
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JOHNSON, Tomi H., Martin BRUDERER, Y. CAI, Stephen R. CLARK, Weizhu BAO, Dieter JAKSCH, 2012. Breathing oscillations of a trapped impurity in a Bose gas. In: EPL (Europhysics Letters). 2012, 98(2), 26001. ISSN 0295-5075. eISSN 1286-4854. Available under: doi: 10.1209/0295-5075/98/26001BibTex
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year={2012},
doi={10.1209/0295-5075/98/26001},
title={Breathing oscillations of a trapped impurity in a Bose gas},
number={2},
volume={98},
issn={0295-5075},
journal={EPL (Europhysics Letters)},
author={Johnson, Tomi H. and Bruderer, Martin and Cai, Y. and Clark, Stephen R. and Bao, Weizhu and Jaksch, Dieter},
note={Article Number: 26001}
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<dcterms:abstract xml:lang="eng">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.</dcterms:abstract>
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