Journal article

Publication year: 2002

Journal: Physical review A

Volume number: 66

Issue number: 4

ISSN: 1050-2947

eISSN: 1094-1622

Open access status: Green

DOI Link: https://doi.org/10.1103/PhysRevA.66.042117

Publisher: American Physical Society

Abstract: 
In the framework of the Lindblad theory for open quantum systems, we derive closed analytical expressions of the Heisenberg and Schrodinger generalized uncertainty functions for a particle moving in a harmonic-oscillator potential. The particle is initially in an arbitrary correlated coherent state, and interacts with an environment at finite temperature. We describe how the quantum and thermal fluctuations contribute to the uncertainties in the canonical variables of the system and analyze the relative importance of these fluctuations in the evolution of the system. We show that upon contact with the bath, the system evolves from a quantum-dominated to a thermal-dominated state in a time that is of the same order as the decoherence time calculated in other models in the context of transitions from quantum to classical physics.

Harvard Citation style: Isar, A. and Scheid, W. (2002) Uncertainty functions of the open quantum harmonic oscillator in the Lindblad theory, Physical review A, 66(4), Article 042117. https://doi.org/10.1103/PhysRevA.66.042117

APA Citation style: Isar, A., & Scheid, W. (2002). Uncertainty functions of the open quantum harmonic oscillator in the Lindblad theory. Physical review A. 66(4), Article 042117. https://doi.org/10.1103/PhysRevA.66.042117