6533b829fe1ef96bd128a510
RESEARCH PRODUCT
Stabilizing effect of driving and dissipation on quantum metastable states
Angelo CarolloDavide ValentiBernardo SpagnoloBernardo Spagnolosubject
PhysicsCouplingCondensed matter physicsOhmic dissipationDissipation01 natural sciencesStability (probability)Atomic and Molecular Physics and OpticsSettore FIS/03 - Fisica Della Materia010305 fluids & plasmasMetastability0103 physical sciencesQuantum systemMonochromatic color010306 general physicsQuantumdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-04-13 |