2005/08/18 by A. Isar
Physics and Astronomy · #quant-ph
published as Helv. Phys. Acta 68 (1995) 225-234 · 10 pages
arxiv created 2005/08/18 · arxiv updated 2009/12/01
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.