Publikation:

The role of fluctuations in quantum and classical time crystals

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2023

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Heugel, Toni Louis
Eichler, Alexander
Chitra, Ramasubramanian

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Deutsche Forschungsgemeinschaft (DFG): 449653034
Swiss National Science Foundation: CRSII5_177198/1
Swiss National Science Foundation: PP00P2_190078

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SciPost Physics Core. SciPost Foundation. 2023, 6(3), 053. eISSN 2666-9366. Verfügbar unter: doi: 10.21468/scipostphyscore.6.3.053

Zusammenfassung

Discrete time crystals (DTCs) are a many-body state of matter whose dynamics are slower than the forces acting on it. The same is true for classical systems with period-doubling bifurcations. Hence, the question naturally arises what differentiates classical from quantum DTCs. Here, we analyze a variant of the Bose-Hubbard model, which describes a plethora of physical phenomena and has both a classical and a quantum time-crystalline limit. Fluctuations enter the system due to the intrinsic quantum uncertainty and/or due to finite coupling to an environment. These fluctuations can activate transitions between the system’s various stationary solutions. We study the role of fluctuations on the stability of the system in the long-time limit and find no distinction between quantum and classical DTCs. This allows us to probe the fluctuations in an experiment using two strongly coupled parametric resonators subject to classical noise.

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530 Physik

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ISO 690HEUGEL, Toni Louis, Alexander EICHLER, Ramasubramanian CHITRA, Oded ZILBERBERG, 2023. The role of fluctuations in quantum and classical time crystals. In: SciPost Physics Core. SciPost Foundation. 2023, 6(3), 053. eISSN 2666-9366. Verfügbar unter: doi: 10.21468/scipostphyscore.6.3.053
BibTex
@article{Heugel2023-08-10fluct-70563,
  year={2023},
  doi={10.21468/scipostphyscore.6.3.053},
  title={The role of fluctuations in quantum and classical time crystals},
  number={3},
  volume={6},
  journal={SciPost Physics Core},
  author={Heugel, Toni Louis and Eichler, Alexander and Chitra, Ramasubramanian and Zilberberg, Oded},
  note={Article Number: 053}
}
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