Quantum Interference between Light Sources Separated by 150 Million Kilometers

被引：59

作者：

Deng, Yu-Hao ^{[1
,2
,3
,4
]}

Wang, Hui ^{[1
,2
,3
,4
]}

Ding, Xing ^{[1
,2
,3
,4
]}

Duan, Z-C ^{[1
,2
,3
,4
]}

Qin, Jian ^{[1
,2
,3
,4
]}

Chen, M-C ^{[1
,2
,3
,4
]}

He, Yu ^{[1
,2
,3
,4
]}

He, Yu-Ming ^{[1
,2
,3
,4
]}

Li, Jin-Peng ^{[1
,2
,3
,4
]}

Li, Yu-Huai ^{[1
,2
,3
,4
]}

Peng, Li-Chao ^{[1
,2
,3
,4
]}

Matekole, E. S. ^{[5
,6
]}

Byrnes, Tim ^{[7
]}

Schneider, C. ^{[8
,9
]}

Kamp, M. ^{[8
,9
]}

Wang, Da-Wei ^{[10
]}

Dowling, Jonathan P. ^{[1
,2
,5
,6
,7
]}

Hofling, Sven ^{[1
,2
,8
,9
,11
]}

Lu, Chao-Yang ^{[1
,2
,3
,4
]}

Scully, Marlan O. ^{[12
,13
,14
]}

Pan, Jian-Wei ^{[1
,2
,3
,4
]}

机构：

[1] Univ Sci & Technol China, Shanghai Branch, Dept Modern Phys, Shanghai 201315, Peoples R China

[2] Univ Sci & Technol China, Natl Lab Phys Sci Microscale, Shanghai 201315, Peoples R China

[3] Univ Sci & Technol China, CAS Ctr Excellence, Shanghai 201315, Peoples R China

[4] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Shanghai 201315, Peoples R China

[5] Louisiana State Univ, Hearne Inst Theoret Phys, Baton Rouge, LA 70803 USA

[6] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[7] New York Univ Shanghai, 1555 Century Ave, Shanghai 200122, Peoples R China

[8] Univ Wrzburg, Tech Phys, Phys Inst, D-97074 Wurzburg, Germany

[9] Univ Wrzburg, Wilhelm Conrad Rntgen Ctr Complex Mat Syst, D-97074 Wurzburg, Germany

[10] Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China

[11] Univ St Andrews, SUPA, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[12] Texas A&M Univ, Inst Quantum Sci & Engn, College Stn, TX 77843 USA

[13] Baylor Univ, Dept Phys, Waco, TX 76798 USA

[14] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 08期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

2-PHOTON INTERFERENCE; PHOTONS; STATE; PAIRS;

D O I：

10.1103/PhysRevLett.123.080401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report an experiment to test quantum interference, entanglement, and nonlocality using two dissimilar photon sources, the Sun and a semiconductor quantum dot on the Earth, which are separated by similar to 150 million kilometers. By making the otherwise vastly distinct photons indistinguishable in all degrees of freedom, we observe time-resolved two-photon quantum interference with a raw visibility of 0.796(17), well above the 0.5 classical limit, providing unambiguous evidence of the quantum nature of thermal light. Further, using the photons with no common history, we demonstrate postselected two-photon entanglement with a state fidelity of 0.826(24) and a violation of Bell inequality by 2.20(6). The experiment can be further extended to a larger scale using photons from distant stars and open a new route to quantum optics experiments at an astronomical scale.

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