The propagation characteristic of the EPR entanglement for a composite non-degenerate parametric optical amplification system  

作　　者：赵超樱 谭维翰 

机构地区：[1]The College of Science,Hangzhou Dianzi University [2]The State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics, Shanxi University [3]Department of Physics,Shanghai University

出　　处：《Chinese Physics B》2010年第3期71-75,共5页中国物理B（英文版）

基　　金：Project supported by the Natural Science Foundation of Shanxi Province,China (Grant No. 2006011003)

摘　　要：This paper applies the minimum variance V1 criterion to monitor the evolution of signal and idler modes of a composite non-degenerate optical parametric amplification （NOPA） system. The analytics and numerical calculation show the influence of the transition time, the vacuum fluctuations, and the thermal noise level on the EPR entanglement of the composite NOPA system. It finds that the entanglement and the squeezing degrade as the minimum variance V1 increases.This paper applies the minimum variance V1 criterion to monitor the evolution of signal and idler modes of a composite non-degenerate optical parametric amplification （NOPA） system. The analytics and numerical calculation show the influence of the transition time, the vacuum fluctuations, and the thermal noise level on the EPR entanglement of the composite NOPA system. It finds that the entanglement and the squeezing degrade as the minimum variance V1 increases.

关 键 词：EPR entanglement composite non-degenerate optical parametric amplification theFokker Planck equation 

分 类 号：O431.2[机械工程—光学工程]