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Open AccessArticle

Multi-State Quantum Dissipative Dynamics in Sub-Ohmic Environment: The Strong Coupling Regime

1
Dipartimento di Fisica e Chimica, Group of Interdisciplinary Theoretical Physics, Università di Palermo and CNISM, Unità di Palermo, Viale delle Scienze, Edificio 18, I-90128 Palermo, Italy
2
Radiophysics Department, Lobachevsky State University of Nizhni Novgorod, 23 Gagarin Avenue, Nizhni Novgorod 603950, Russia
3
Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Via S. Sofia 64, I-90123 Catania, Italy
*
Author to whom correspondence should be addressed.
Entropy 2015, 17(4), 2341-2354; https://doi.org/10.3390/e17042341
Received: 21 February 2015 / Revised: 8 April 2015 / Accepted: 13 April 2015 / Published: 17 April 2015
(This article belongs to the Special Issue Quantum Computation and Information: Multi-Particle Aspects)
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. View Full-Text
Keywords: quantum systems with finite Hilbert space; open quantum systems; quantum statistical methods quantum systems with finite Hilbert space; open quantum systems; quantum statistical methods
MDPI and ACS Style

Magazzù, L.; Valenti, D.; Carollo, A.; Spagnolo, B. Multi-State Quantum Dissipative Dynamics in Sub-Ohmic Environment: The Strong Coupling Regime. Entropy 2015, 17, 2341-2354.

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