Physics – Quantum Physics
Scientific paper
2005-05-11
Chin. Phys. Lett. 21 (2004), 1
Physics
Quantum Physics
5 pages, no figure, Revtex4
Scientific paper
10.1088/0256-307X/21/1/001
The dissipative and decoherence properties as well as the asymptotic behavior of the single mode electromagnetic field interacting with the time-dependent squeezed vacuum field reservoir are investigated in detail by using the algebraic dynamical method. With the help of the left and right representations of the relevant $hw(4)$ algebra, the dynamical symmetry of the nonautonomous master equation of the system is found to be $su(1,1)$. The unique equilibrium steady solution is found to be the squeezed state and any initial state of the system is proved to approach the unique squeezed state asymptotically. Thus the squeezed vacuum field reservoir is found to play the role of a squeezing mold of the cavity field.
An Jun-Hong
Jia Cheng-Long
Luo Hong-Gang
Wang Shun-Jin
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