Density operator and entropy of the damped quantum harmonic oscillator

Details Density operator and entropy of the damped quantum harmonic oscillator Density operator and entropy of the damped quantum harmonic oscillator

2005-08-18

arxiv.org/abs/quant-ph/0508141v1

Helv. Phys. Acta 68 (1995) 225-234

Physics

Quantum Physics

10 pages

Scientific paper

The expression for the density operator of the damped harmonic oscillator is derived from the master equation in the framework of the Lindblad theory for open quantum systems. Then the von Neumann entropy and effective temperature of the system are obtained. The entropy for a state characterized by a Wigner distribution function which is Gaussian in form is found to depend only on the variance of the distribution function.

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