Einstein-Podolsky-Rosen Energy-Time Entanglement of Narrow-Band Biphotons

被引：22

作者：

Mei, Yefeng ^{[1
,2
,3
]}

Zhou, Yiru ^{[1
]}

Zhang, Shanchao ^{[1
]}

Li, Jianfeng ^{[1
]}

Liao, Kaiyu ^{[1
]}

Yan, Hui ^{[1
]}

Zhu, Shi-Liang ^{[1
,4
]}

Du, Shengwang ^{[1
,2
,3
]}

机构：

[1] South China Normal Univ, GPETR Ctr Quantum Precis Measurement & SPTE, Guangdong Prov Key Lab Quantum Engn & Quantum Mat, Guangzhou 510006, Guangdong, Peoples R China

[2] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Clear Water Bay, Hong Kong, Peoples R China

[3] Hong Kong Univ Sci & Technol, William Mong Inst Nano Sci & Technol, Kowloon, Clear Water Bay, Hong Kong, Peoples R China

[4] Nanjing Univ, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 01期

基金：

中国国家自然科学基金;

关键词：

QUANTUM; REALIZATION; PAIR;

D O I：

10.1103/PhysRevLett.124.010509

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the direct characterization of energy-time entanglement of narrow-band biphotons produced from spontaneous four-wave mixing in cold atoms. The Stokes and anti-Stokes two-photon temporal correlation is measured by single-photon counters with nanosecond temporal resolution, and their joint spectrum is determined by using a narrow linewidth optical cavity. The energy-time entanglement is verified by the joint frequency-time uncertainty product of 0.063 +/- 0.0044, which does not only violate the separability criterion but also satisfies the continuous variable Einstein-Podolsky-Rosen steering inequality.

引用

页数：5

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