Spatial–spectral mapping to prepare frequency entangled qudits

Yang，Zi Xiang1; Zeng，Zi Qi1; Tian，Ying1; Wang，Shun1; Shimizu，Ryosuke2; Wu，Hao Yu1; Liu，Shilong3,4; Jin，Rui Bo1,5

2023-05-01

10.1364/OL.487300

Optics Letters   影响因子和分区

0146-9592

1539-4794

Entangled qudits, the high-dimensional entangled states, play an important role in the study of quantum information. How to prepare entangled qudits in an efficient and easy-to-operate manner is still a challenge in quantum technology. Here, we demonstrate a method to engineer frequency entangled qudits in a spontaneous parametric downconversion process. The proposal employs an angle-dependent phase-matching condition in a nonlinear crystal, which forms a classical-quantum mapping between the spatial (pump) and spectral (biphotons) degrees of freedom. In particular, the pump profile is separated into several bins in the spatial domain, and thus shapes the down-converted biphotons into discrete frequency modes in the joint spectral space. Our approach provides a feasible and efficient method to prepare a high-dimensional frequency entangled state. As an experimental demonstration, we generate a three-dimensional entangled state by using a homemade variable slit mask.

SCI ; EI

英语

其他

National Natural Science Foundation of China[11704290];National Natural Science Foundation of China[11904112];National Natural Science Foundation of China[12074299];National Natural Science Foundation of China[91836102];

Optics

Optics

WOS:000992168400002

Optica Publishing Group

20231914071016

Degrees of freedom (mechanics) ; Phase matching ; Photomapping ; Quantum optics

Surveying:405.3 ; Electronic Circuits:713 ; Light/Optics:741.1 ; Photography:742.1 ; Mechanics:931.1 ; Quantum Theory; Quantum Mechanics:931.4

PHYSICS

2-s2.0-85158851732

Scopus

1.Hubei Key Laboratory of Optical Information and Pattern Recognition,Wuhan Institute of Technology,Wuhan,430205,China
2.University of Electro-Communications,Chofu,1-5-1 Chofugaoka, Tokyo,Japan
3.Department of Physics,University of Ottawa,Ottawa,25 Templeton Street,K1N 6N5,Canada
4.femtoQ Lab,Engineering Physics Department,Polytechnique Montréal,Montréal,H3T 1JK,Canada
5.Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Yang，Zi Xiang,Zeng，Zi Qi,Tian，Ying,等. Spatial–spectral mapping to prepare frequency entangled qudits[J]. Optics Letters,2023,48(9):2361-2364.

Yang，Zi Xiang.,Zeng，Zi Qi.,Tian，Ying.,Wang，Shun.,Shimizu，Ryosuke.,...&Jin，Rui Bo.(2023).Spatial–spectral mapping to prepare frequency entangled qudits.Optics Letters,48(9),2361-2364.

Yang，Zi Xiang,et al."Spatial–spectral mapping to prepare frequency entangled qudits".Optics Letters 48.9(2023):2361-2364.