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Entropy 2015, 17(4), 2341-2354; doi:10.3390/e17042341

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.
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)
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Abstract

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
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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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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