Breathing oscillations of a trapped impurity in a Bose gas

T. H. Johnson, M. Bruderer, Y. Cai, S. R. Clark, W. Bao, D. Jaksch

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)
122 Downloads (Pure)

Abstract

Motivated by a recent experiment [J. Catani et al., arXiv:1106.0828v1 preprint, 2011], 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. In the Gross-Pitaevskii regime we obtain breathing oscillations whose amplitudes are suppressed by self trapping, due to interactions with the Bose gas. Introducing phonons in the Bose gas leads to the damping of breathing oscillations and non-Markovian dynamics of the width of the impurity, the degree of which can be engineered through controllable parameters. Our results reproduce the main features of the impurity dynamics observed by Catani et al. despite experimental thermal effects, and are supported by simulations of the system in the Gross-Pitaevskii regime. Moreover, we predict novel effects at lower temperatures due to self-trapping and the inhomogeneity of the trapped Bose gas.
Original languageEnglish
Article number26001
Number of pages6
JournalEPL (Europhysics Letters)
Volume98
Issue number2
DOIs
Publication statusPublished - 26 Apr 2012

Keywords

  • cond-mat.quant-gas

Fingerprint Dive into the research topics of 'Breathing oscillations of a trapped impurity in a Bose gas'. Together they form a unique fingerprint.

Cite this