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Resonant-force induced symmetry breaking in a quantum parametric oscillator

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2024

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https://doi.org/10.48550/arXiv.2405.02706
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http://arxiv.org/abs/2405.02706

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Deutsche Forschungsgemeinschaft (DFG): 425217212

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A parametrically modulated oscillator has two opposite-phase vibrational states at half the modulation frequency. An extra force at the vibration frequency breaks the symmetry of the states. The effect can be extremely strong due to the interplay between the force and the quantum fluctuations resulting from the coupling of the oscillator to a thermal bath. The force changes the rates of the fluctuation-induced walk over the quantum states of the oscillator. If the number of the states is large, the effect accumulates to an exponentially large factor in the rate of switching between the vibrational states. We find the factor and analyze it in the limiting cases. We show that in the zero-temperature limit the extra force breaks the detailed balance, leading to a nonperturbatively strong increase of the switching rate.

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530 Physik

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Condensed Matter, Statistical Mechanics, oscillator

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ISO 690BONESS, Daniel K.J., Wolfgang BELZIG, Mark I. DYKMAN, 2024. Resonant-force induced symmetry breaking in a quantum parametric oscillator
BibTex
@unpublished{Bone2024-05-04Reson-70270,
  year={2024},
  doi={10.48550/arXiv.2405.02706},
  title={Resonant-force induced symmetry breaking in a quantum parametric oscillator},
  author={Boneß, Daniel K.J. and Belzig, Wolfgang and Dykman, Mark I.}
}
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