摘要
从理论上论证了连续变量的EPR纠缠态可以通过利用普通分束器分离一束单模压缩光或光孤子压缩态而得到.据所知这是制备纠缠态的最简方案.根据推导出的具体公式分析了2种非经典光场——压缩态和纠缠态之间的关系以及压缩程度对形成纠缠态的影响.
It is theoretically proved that the two output light beams can be used as a pair of EPR(Einstin-Podolsky-Rosen) entangled beams when the incident light upon a beam splitter is a single mode quadrature-squeezed coherent state or a squeezed quantum soliton. It is the simplest scheme for preparing entangled states to our knowledge. The formulas explicitly show the correlation between the two nonclassical optical fields: squeezed states and entangled states. The affection of squeezing degree on entanglement is also investigated.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2004年第4期55-58,共4页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金项目(60378011)
关键词
纠缠
压缩态
分束器
条件方差
entanglement
squeezed states
beam splitter
conditional variance
