The Linblad equation for a quantum dissipative harmonic oscillator

Authors

  • Вячеслав Сергеевич Кирчанов (Vjacheslav S. Kirchanov) Perm National Research Polytechnic University

DOI:

https://doi.org/10.17072/1994-3598-2018-2-05-12

Keywords:

открытая квантовая система, квантовый гармонический осциллятор с диссипацией, уравнение для плотности квантовой энтропии

Abstract

Linblad's equation is obtained for a quantum harmonic oscillator with linear dissipation in a form convenient for applications. The operator of the equation contains the usual linear Liouville superoperator, which includes the Hamiltonian and the dissipation energy operator, and the Linblad quadratic superoperator. Linblad's superoperator consists of the sum of the operators "pulse diffusion" and "coordinate diffusion" acting in the phase space, and the difference between the "dissipation rate" operator of the pulse and the coordinate in the phase space. A solution of the system of equations is found for the second moments of the coordinate, the momentum, and their product obtained from the Linblad equation. The equation for the entropy density is derived and it is shown that the entropy density according to the Linblad equation increases.

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Published

2018-07-13

How to Cite

Кирчанов (Vjacheslav S. Kirchanov) В. С. (2018). The Linblad equation for a quantum dissipative harmonic oscillator. Bulletin of Perm University. Physics, (2(40). https://doi.org/10.17072/1994-3598-2018-2-05-12

Issue

Section

Regular articles