Joint entropy of quantum damped harmonic oscillators

A. J. Fotué, A. V. Wirngo, R.M. Keumo Tsiaze +1 more

Аурелиан Исар

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.

Özgür Özcan, Ethem Aktürk, Ramazan Sever

François Béceau Pelap, Anaclet Fomethe, A. J. Fotué +1 more

The time dependence of probability and Shannon entropy of a modified damped harmonic oscillator is studied by using single and double Gaussian wave functions through the Feynman path method. We establish that the damped coefficient as well as the system frequency and the distance separating two consecutive waves of the initial double Gaussian function influences the coherence of the system and can be used to control its decoherence.

Chisanupong Puttarprom, Monsit Tanasittikisol, Sikarin Yoo-Kong

Ethem Aktürk, Ozcan, O., R. Sever

Time dependent entropy of harmonic oscillator with time dependent mass and frequency are investigated. The joint entropy so called Leipnik's entropy is calculated by using time dependent wave function obtained by the Feynman path integral method. It is shown that, Leipnik's entropy fluctuates with time. However in constant mass and time dependent frequency case, entropy increases monotonically with time.