Vibration multistability and quantum switching for dispersive coupling
arXiv:1401.4702 · doi:10.1103/PhysRevB.89.155439
Abstract
We investigate a resonantly modulated harmonic mode, dispersively coupled to a nonequilibrium few-level quantum system. We focus on the regime where the relaxation rate of the system greatly exceeds that of the mode, and develop a quantum adiabatic approach for analyzing the dynamics. Semiclassically, the dispersive coupling leads to a mutual tuning of the mode and system into and out of resonance with their modulating fields, leading to multistability. In the important case where the system has two energy levels and is excited near resonance, the compound system can have up to three metastable states. Nonadiabatic quantum fluctuations associated with spontaneous transitions in the few-level system lead to switching between the metastable states. We provide parameter estimates for currently available systems.
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Cited by in corpus (5)
- Perturbative approach to weakly driven many-particle systems in the presence of approximate conservation laws
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- Quantum properties of a strongly driven Josephson junction
- Stepwise relaxation and stochastic precession in degenerate oscillators dispersively coupled to particles
- Multistable excitonic Stark effect