Journal
EPL
Volume 98, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1209/0295-5075/98/26001
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Funding
- Swiss National Science Foundation [PBSKP2/130366]
- Ministry of Education of Singapore [R-146-000-120-112]
- National Research Foundation
- Swiss National Science Foundation (SNF) [PBSKP2_130366] Funding Source: Swiss National Science Foundation (SNF)
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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. Copyright (C) EPLA, 2012
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