Polarization Entanglement by Time-Reversed Hong-Ou-Mandel Interference

被引：48
作者：
Chen, Yuanyuan [1 ,2 ,3 ]
Ecker, Sebastian [1 ,2 ]
Wengerowsky, Soeren [1 ,2 ]
Bulla, Lukas [1 ,2 ]
Joshi, Siddarth Koduru [1 ,2 ,4 ,5 ]
Steinlechner, Fabian [1 ,2 ]
Ursin, Rupert [1 ,2 ]
机构：
[1] Austrian Acad Sci, Inst Quantum Opt & Quantum Informat Vienna IQOQI, Boltzmanngasse 3, A-1090 Vienna, Austria
[2] Univ Vienna, Fac Phys, Vienna Ctr Quantum Sci & Technol VCQ, Boltzmanngasse 5, A-1090 Vienna, Austria
[3] Nanjing Univ, State Key Lab Novel Software Technol, Xianlin Ave 163, Nanjing 210046, Jiangsu, Peoples R China
[4] Univ Bristol, Quantum Engn Technol Labs, HH Wills Phys Lab, Merchant Venturers Bldg,Woodland Rd, Bristol BS8 1UB, Avon, England
[5] Univ Bristol, Dept Elect & Elect Engn, Merchant Venturers Bldg,Woodland Rd, Bristol BS8 1UB, Avon, England
来源：
PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 20期
基金：
国家自然科学基金重大项目; 中国国家自然科学基金; 奥地利科学基金会;
关键词：
PERIODICALLY POLED KTIOPO4; QUANTUM KEY DISTRIBUTION; PHOTONS; COMMUNICATION; CRYSTALS; STATES;
D O I：
10.1103/PhysRevLett.121.200502
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Sources of entanglement are an enabling resource in quantum technology, and pushing the limits of generation rate and quality of entanglement is a necessary prerequisite towards practical applications. Here, we present an ultrabright source of polarization-entangled photon pairs based on time-reversed Hong-Ou-Mandel interference. By superimposing four pair-creation possibilities on a polarization beam splitter, pairs of identical photons are separated into two spatial modes without the usual requirement for wavelength distinguishability or noncollinear emission angles. Our source yields high-fidelity polarization entanglement and high pair-generation rates without any requirement for active interferometric stabilization, which makes it an ideal candidate for a variety of applications, in particular those requiring indistinguishable photons.
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页数：6
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