Temperature changes and squeezing properties of the system of time-dependent harmonic oscillators
- 1 February 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 53 (2), 703-708
- https://doi.org/10.1103/physreva.53.703
Abstract
The density operator is defined as a function of a generalized invariant for the system of time-dependent harmonic oscillators. Applying this to the Hamiltonian with two asymptotic regions, we calculate the temperature change driven by a time-varying Hamiltonian. Furthermore, the squeezing properties of an eigenstate and a coherent state of the initial Hamiltonian are discussed. © 1996 The American Physical Society.Keywords
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