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Multi-state quantum dissipative dynamics in sub-ohmic environment: The strong coupling regime

  • Authors: Magazz├╣, L.; Valenti, D.; Carollo, A.; Spagnolo, B.
  • Publication year: 2015
  • Type: Articolo in rivista (Articolo in rivista)
  • OA Link:


We study the dissipative quantum dynamics and the asymptotic behavior of a particle in a bistable potential interacting with a sub-Ohmic broadband environment. The reduced dynamics, in the intermediate to strong dissipation regime, is obtained beyond the two-level system approximation by using a real-time path integral approach. We find a crossover dynamic regime with damped intra-well oscillations and incoherent tunneling and a completely incoherent regime at strong damping. Moreover, a nonmonotonic behavior of the left/right well population difference is found as a function of the damping strength.