Open AccessDETAILED BALANCE AND ENTROPY FOR A TWO-LEVEL ATOM IN A SQUEEZED VACUUM VIA DEGENERATE TWO PHOTON PROCESSES
Author(s) -
XunLi Feng,
He Lin-Sheng
Publication year - 1997
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.46.1926
Subject(s) - degenerate energy levels , physics , detailed balance , vacuum state , photon , quantum mechanics , entropy (arrow of time) , squeezed coherent state , quantum optics , classical mechanics , quantum , coherent states
Using the principle of detailed balance and the evolution of entropy, the stability of a two-level system coupled to a squeezed vacuum via degenerate two-photon processes is investigated. We find that the stability of the system depends on the squeezing parameter M of squeezed vacuum. When |M| is small, the system is unstable, but when M is a very large real number, the system is driven to a stable state but far from equilibrium.