摘要
本文利用基于Ⅰ类周期极化磷酸氧钛钾的光学参量振荡器(Optical Parametric Oscillator,OPO)产生了795 nm的真空压缩态,研究了不同透过率的OPO输出镜对压缩度和压缩纯度的影响。理论上,模拟了压缩态减光子制备猫态的Wigner函数,发现在已产生的压缩态下,猫态的Wigner函数原点呈现明显负性。
By using Optical Parametric Oscillation(OPO)based on a typeⅠpotassium titanyl phosphate,we produce a 795 nm squeezed vacuum state and study the different transmittance of OPO output mirror effect on the squeezing degree and squeezing purity.The Wigner function of the cat state is simulated theoretically by subtracting photons from the squeezed state,and it is found that the origin of Wigner function of the prepared state is obviously negative under the generated squeezed state.
作者
何亚亚
邓琦琦
李淑静
徐忠孝
王海
HE Ya-ya;DENG Qi-qi;LI Shu-jing;XU Zhong-xiao;WANG Hai(State Key of Laboratory of Quantum Optics and Quantum Optics Devices,Collaborative Innovation Center of Extreme Optics;Institute of Opto-Electronics,Shanxi University,Taiyuan,Shanxi 030006,China)
出处
《量子光学学报》
北大核心
2019年第4期372-379,共8页
Journal of Quantum Optics
基金
国家重点研发计划(2016YFA0301402)
国家自然科学基金(11834010,11604191,11974228,61805133)
山西省“1331工程”重点学科建设计划资助的课题.
关键词
真空压缩态
压缩纯度
“薛定谔”猫态
量子中继
squeezed vacuum state
squeezing purity
Schrodinger cat state
quantum repeater
