| Issue |
EPL
Volume 118, Number 5, June 2017
|
|
|---|---|---|
| Article Number | 56002 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/118/56002 | |
| Published online | 04 August 2017 | |
Discrete scale invariant quantum dynamics and universal quantum beats in Bose gases
Department of Physics and Astronomy, University of British Columbia - Vancouver V6T 1Z1, Canada
Received: 9 December 2016
Accepted: 11 July 2017
We study the signature of classical scale invariance in the far-from-equilibrium quantum dynamics of two-dimensional Bose gases. We show that the density profile displays a scale invariant logarithmic singularity near the center. In addition, the density oscillates due to quantum beats with universal structures. Namely, the frequencies of the beats can be connected with one another by a universal discrete scale transformation induced by the classical scale invariance. The experimental applicability of these results is then discussed.
PACS: 67.85.De – Dynamic properties of condensates; excitations, and superfluid flow / 67.85.Jk – Other Bose-Einstein condensation phenomena
© EPLA, 2017
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