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Stabilizing effect of driving and dissipation on quantum metastable states

  • Authors: Valenti, Davide; Carollo, Angelo; Spagnolo, Bernardo
  • Publication year: 2018
  • Type: Articolo in rivista (Articolo in rivista)
  • OA Link:


We investigate how the combined effects of strong Ohmic dissipation and monochromatic driving affect the stability of a quantum system with a metastable state. We find that, by increasing the coupling with the environment, the escape time makes a transition from a regime in which it is substantially controlled by the driving, displaying resonant peaks and dips, to a regime of frequency-independent escape time with a peak followed by a steep falloff. The escape time from the metastable state has a nonmonotonic behavior as a function of the thermal-bath coupling, the temperature, and the frequency of the driving. The quantum noise-enhanced stability phenomenon is observed in the investigated system.