Emergence of quantum-classical dynamics in an open quantum environment

Publication Type:

Journal Article

Authors:

Source:

Journal of Chemical Physics, Volume 117, Number 17, p.7852-7863 (2002)

URL:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036849663&doi=10.1063%2f1.1509745&partnerID=40&md5=998c3ef792661135154a3babbff00873

Keywords:

Brownian movement, Chaos theory, Computer Simulation, Continuum mechanics, Degrees of freedom (mechanics), Equations of motion, Freezing, Harmonic generation, Many-body systems, Matrix algebra, Mixtures, Natural frequencies, Nonadiabatic dynamics, Oscillators (mechanical), Quantum Theory, Spectrum analysis, Thermal effects

Abstract:

The conditions under which an open quantum-mechanical system was capable of being described by mixed quantum-classical dynamics were derived. Decoherence in a model composite quantum system comprising of two coupled systems, A and C was studied using influence functional methods. The loss of quantum coherence in each subsystem was discussed in the extreme nonadiabatic regime where the system A was in a frozen state. Results showed that susbsystem C lost coherence rapidly whereas susbsystem A maintained coherence for longer periods of time due to the influence of C on A.

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