4.8 Article

Ultracold Bose Gases in Dynamic Disorder with Tunable Correlation Time

期刊

PHYSICAL REVIEW LETTERS
卷 128, 期 23, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.128.233601

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资金

  1. Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) via the Collaborative Research Center SFB/TR185 [277625399]
  2. Max Planck Graduate Center
  3. Johannes Gutenberg-Universitat Mainz (MPGC)

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We experimentally study the dissipative dynamics of ultracold bosonic gases in a dynamic disorder potential with tunable correlation time. Our results reveal the interplay between superfluidity and time-dependent disorder and establish ultracold atoms as a platform for studying spatiotemporal noise and time-dependent disorder.
We study experimentally the dissipative dynamics of ultracold bosonic gases in a dynamic disorder potential with tunable correlation time. First, we measure the heating rate of thermal clouds exposed to the dynamic potential and present a model of the heating process, revealing the microscopic origin of dissipation from a thermal, trapped cloud of bosons. Second, for Bose-Einstein condensates, we measure the particle loss rate induced by the dynamic environment. Depending on the correlation time, the losses are either dominated by heating of residual thermal particles or the creation of excitations in the superfluid, a notion we substantiate with a rate model. Our results illuminate the interplay between superfluidity and time-dependent disorder and on more general grounds establish ultracold atoms as a platform for studying spatiotemporal noise and time-dependent disorder.

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