Stabilizing an ultracold Fermi gas against Fermi acceleration to superdiffusion through localization
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866913936975069184 |
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| author | Barbosa, Sian Kiefer-Emmanouilidis, Maximilian Lang, Felix Koch, Jennifer Widera, Artur |
| author_facet | Barbosa, Sian Kiefer-Emmanouilidis, Maximilian Lang, Felix Koch, Jennifer Widera, Artur |
| contents | Anderson localization, i.e., destructive quantum interference of multiple-scattering paths, halts transport entirely. Contrarily, time-dependent random forces expedite transport via Fermi acceleration, proposed as a mechanism for high-energy cosmic rays. Their competition creates interesting dynamics, but experimental observations are scarce. Here, we experimentally study the expansion of an ultracold Fermi gas inside time-dependent disorder and observe distinct regimes from sub- to superdiffusion. Unexpectedly, quantum interference counteracts acceleration in strong disorder. Our system enables the investigation of Fermi acceleration in the quantum-transport regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_08224 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Stabilizing an ultracold Fermi gas against Fermi acceleration to superdiffusion through localization Barbosa, Sian Kiefer-Emmanouilidis, Maximilian Lang, Felix Koch, Jennifer Widera, Artur Quantum Gases Atomic Physics Quantum Physics Anderson localization, i.e., destructive quantum interference of multiple-scattering paths, halts transport entirely. Contrarily, time-dependent random forces expedite transport via Fermi acceleration, proposed as a mechanism for high-energy cosmic rays. Their competition creates interesting dynamics, but experimental observations are scarce. Here, we experimentally study the expansion of an ultracold Fermi gas inside time-dependent disorder and observe distinct regimes from sub- to superdiffusion. Unexpectedly, quantum interference counteracts acceleration in strong disorder. Our system enables the investigation of Fermi acceleration in the quantum-transport regime. |
| title | Stabilizing an ultracold Fermi gas against Fermi acceleration to superdiffusion through localization |
| topic | Quantum Gases Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2311.08224 |