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BERNARDO SPAGNOLO

Transient Dynamics of a Driven Quantum Bistable System

  • Authors: MAGAZZU', L; VALENTI, D; SPAGNOLO, B; FALCI, G
  • Publication year: 2013
  • Type: Altro
  • Key words: Quantum systems with finite Hilbert space; Decoherence; open systems; quantum statistical methods; Fluctuation phenomena, random processes, noise, and Brownian motion
  • OA Link: http://hdl.handle.net/10447/83746

Abstract

We study the transient dynamics and the asymptotic behaviour of a multilevel system in the strong dissipation regime. The system is modeled as a periodically driven quantum particle in an asymmetric double well potential, interacting with the bosonic heat bath of the Caldeira-Leggett model. The analytical approach used is non- perturbative in the particle-bath coupling and is based on a space-discretized path integral expression for the particle’s reduced density matrix. By a suitable approximation on the Feynman-Vernon influence functional a Markov-approximated master equation is obtained for the populations in the Discrete Variable Representation (DVR).