Journal
PHYSICAL REVIEW A
Volume 79, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.052120
Keywords
Brownian motion; harmonic oscillators; quantum entanglement
Categories
Funding
- Emil Aaltonen foundation
- Vilho
- Yrjo and Kalle Vaisala foundation
- Magnus Ehrnrooth Foundation
- Academy of Finland [108699, 115982, 115682, 8125004]
- Turku Collegium of Science and Medicine
- Academy of Finland (AKA) [108699, 115982, 108699] Funding Source: Academy of Finland (AKA)
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The dissipative dynamics of a quantum Brownian particle is studied for different types of environment. We derive analytic results for the time evolution of the mean energy of the system for Ohmic, sub-Ohmic, and super-Ohmic environments, without performing the Markovian approximation. Our results allow one to establish a direct link between the form of the environmental spectrum and the thermalization dynamics. This in turn leads to a natural explanation of the microscopic physical processes ruling the system time evolution both in the short-time non-Markovian region and in the long-time Markovian one. Our comparative study of thermalization for different environments sheds light on the physical contexts in which non-Markovian dissipation effects are dominant.
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