摘要
基于量子相干和量子空间定位的原理,设计了量子空间定位的实验方案.讨论了在脉冲激光作用下,由第二类自发参量下转换所产生的纠缠光子对的光谱特征、对应的相干函数特点以及对量子定位的影响.结果表明,随着激光脉冲宽度的增加,纠缠光子对的相干性减小,量子定位的测量准确度降低.
Based on the principle of quantum coherence and quantum spatial positioning,the experimental scheme of the quantum spatial positioning is designed.The spectrum characteristics of the entanglement photons with spontaneous type-II parametric down-conversion pumped by a broadband frequency pulse laser are discussed.The characteristics of the second-order coherent function and the impact of the phase matching conditions on the quantum spatial positioning are analyzed.It is shown that awith the increase of the pump band-width,the coherence of entangled biphoton is diminished,and the measuring accuracy of the quantum spatial positioning is also reduced.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2010年第10期1811-1815,共5页
Acta Photonica Sinica
基金
国防预研基金(9140A24010607DZ0124)资助
关键词
量子定位
纠缠光子
脉冲激光
相干函数
Quantum positioning
Entanglement photon
Pulse laser
Coherence function
