High-fidelity quantum teleportation toward cubic phase gates beyond the no-cloning limit

被引：12

作者：

Wang, Qingwei ^{[1
]}

Tian, Yuhang ^{[1
]}

Li, Wei ^{[2
]}

Tian, Long ^{[1
,3
]}

Wang, Yajun ^{[1
,3
]}

Zheng, Yaohui ^{[1
,3
]}

机构：

[1] Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China

[2] Shanxi Univ, Coll Phys & Elect Engn, Taiyuan 030006, Shanxi, Peoples R China

[3] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China

来源：

PHYSICAL REVIEW A | 2021年 / 103卷 / 06期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

SQUEEZED VACUUM STATES; LIGHT; DB; REDUCTION;

D O I：

10.1103/PhysRevA.103.062421

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

High-fidelity quantum teleportation is necessary to configure a cubic phase gate that enables the processing of the nonclassicality in an input quantum state. The noise variance of the antisqueezing component, which increases rapidly with a higher pump factor, contaminates the squeezing component due to the phase fluctuation and results in a reduction of the fidelity. Here, we balance the influence of the extraction loss and phase fluctuation on the fidelity and optimize the performance of quantum teleportation. As a result, a fidelity F = 0.905 +/- 0.022 is experimentally achieved. The ultrahigh fidelity is expected to configure a cubic phase gate involving four-time sequential teleportation to perform universal continuous-variable quantum information processing.

引用

页数：6

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