Accuracy for superposition of squeezed states in lossless and dissipative channel

被引：2
|
作者：
Xie Duan [1 ,2 ]
Peng JinYe [1 ]
机构：
[1] Northwestern Polytech Univ, Sch Elect & Informat, Xian 710072, Peoples R China
[2] Xian Univ Posts & Telecommun, Sch Elect Engn, Xian 710121, Peoples R China
来源：
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2013年 / 56卷 / 03期
基金：
中国国家自然科学基金;
关键词：
time accuracy; quantum clock synchronization; superposition of squeezed states; CLOCK-SYNCHRONIZATION; QUANTUM; ENTANGLEMENT; PHOTONS;
D O I：
10.1007/s11433-013-5027-3
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The analysis of accuracy for superposition of squeezed states (SSSs) in lossless and loss case has been performed in this study. In lossless case, time accuracies of SSSs with mean photon number n (s) have a scaling of n (s) (-2) in two limits of large and small squeezing. With the help of photon loss model, the dissipative channel will degrade accuracies has been proved. In the limit of large squeezing, the accuracy will slowly decrease with the reduction of transmittance eta. In the limit of small squeezing, time accuracy scales as 1/(eta (4) n (s) (2) ) and will decrease much faster along with eta decreases.
引用
收藏
页码：593 / 599
页数：7
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