Compact generation scheme of path-frequency hyperentangled photons using 2D periodical nonlinear photonic crystal

doi:10.1088/1674-1056/ad0625

中国物理B ›› 2023, Vol. 32 ›› Issue (12): 120307-120307.doi: 10.1088/1674-1056/ad0625

Compact generation scheme of path-frequency hyperentangled photons using 2D periodical nonlinear photonic crystal

Yang-He Chen(陈洋河)^1,2, Bo Ji(季波)^1,2, Nian-Qin Li(李念芹)^1,2, Zhen Jiang(姜震)^1,2, Wei Li(李维)³, Yu-Dong Li(李昱东)³, Liang-Sen Feng(冯梁森)³, Teng-Fei Wu(武腾飞)³, and Guang-Qiang He(何广强)^1,2,†

1 SJTU Pinghu Institute of Intelligent Optoelectronics, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
2 State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
3 Science and Technology on Metrology and Calibration Laboratory, Changcheng Institute of Metrology & Measurement, Aviation Industry Corporation of China, Beijing 100095, China

收稿日期:2023-08-02 修回日期:2023-10-18 接受日期:2023-10-24 出版日期:2023-11-14 发布日期:2023-11-30
通讯作者: Guang-Qiang He E-mail:gqhe@sjtu.edu.cn
基金资助:
Project supported by the Key-Area Research and Development Program of Guangdong Province of China (Grant No.2018B030325002), the National Natural Science Foundation of China (Grant No.62075129), the Open Project Program of SJTU-Pinghu Institute of Intelligent Optoelectronics(Grant No.2022SPIOE204), the Science and Technology on Metrology and Calibration Laboratory (Grant No.JLJK2022001B002), and the Sichuan Provincial Key Laboratory of Microwave Photonics (Grant No. 2023-04).

Compact generation scheme of path-frequency hyperentangled photons using 2D periodical nonlinear photonic crystal

1 SJTU Pinghu Institute of Intelligent Optoelectronics, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
2 State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
3 Science and Technology on Metrology and Calibration Laboratory, Changcheng Institute of Metrology & Measurement, Aviation Industry Corporation of China, Beijing 100095, China

Received:2023-08-02 Revised:2023-10-18 Accepted:2023-10-24 Online:2023-11-14 Published:2023-11-30
Contact: Guang-Qiang He E-mail:gqhe@sjtu.edu.cn
Supported by:
Project supported by the Key-Area Research and Development Program of Guangdong Province of China (Grant No.2018B030325002), the National Natural Science Foundation of China (Grant No.62075129), the Open Project Program of SJTU-Pinghu Institute of Intelligent Optoelectronics(Grant No.2022SPIOE204), the Science and Technology on Metrology and Calibration Laboratory (Grant No.JLJK2022001B002), and the Sichuan Provincial Key Laboratory of Microwave Photonics (Grant No. 2023-04).

摘要/Abstract

摘要： Hyperentanglement is a promising resource for achieving high capacity quantum communication. Here, we propose a compact scheme for the generation of path-frequency hyperentangled photon pairs via spontaneous parametric down-conversion (SPDC) processes, where six different paths and two different frequencies are covered. A two-dimensional periodical χ⁽²⁾ nonlinear photonic crystal (NPC) is designed to satisfy type-I quasi-phase-matching conditions in the plane perpendicular to the incident pump beam, and a perfect phase match is achieved along the pump beam's direction to ensure high conversion efficiency, with theoretically estimated photon flux up to 2.068×10⁵ pairs·s^-1·mm^-2. We theoretically calculate the joint-spectral amplitude (JSA) of the generated photon pair and perform Schmidt decomposition on it, where the resulting entropy S of entanglement and effective Schmidt rank K reach 3.2789 and 6.4675, respectively. Our hyperentangled photon source scheme could provide new avenues for high-dimensional quantum communication and high-speed quantum information processing.

关键词: hyperentanglement, nonlinear photonic crystal, quasi-phase-matching

Abstract: Hyperentanglement is a promising resource for achieving high capacity quantum communication. Here, we propose a compact scheme for the generation of path-frequency hyperentangled photon pairs via spontaneous parametric down-conversion (SPDC) processes, where six different paths and two different frequencies are covered. A two-dimensional periodical χ⁽²⁾ nonlinear photonic crystal (NPC) is designed to satisfy type-I quasi-phase-matching conditions in the plane perpendicular to the incident pump beam, and a perfect phase match is achieved along the pump beam's direction to ensure high conversion efficiency, with theoretically estimated photon flux up to 2.068×10⁵ pairs·s^-1·mm^-2. We theoretically calculate the joint-spectral amplitude (JSA) of the generated photon pair and perform Schmidt decomposition on it, where the resulting entropy S of entanglement and effective Schmidt rank K reach 3.2789 and 6.4675, respectively. Our hyperentangled photon source scheme could provide new avenues for high-dimensional quantum communication and high-speed quantum information processing.

Key words: hyperentanglement, nonlinear photonic crystal, quasi-phase-matching

中图分类号: (Entanglement production and manipulation)

03.67.Bg

42.65.Lm (Parametric down conversion and production of entangled photons)

Yang-He Chen(陈洋河), Bo Ji(季波), Nian-Qin Li(李念芹), Zhen Jiang(姜震), Wei Li(李维),Yu-Dong Li(李昱东), Liang-Sen Feng(冯梁森), Teng-Fei Wu(武腾飞), and Guang-Qiang He(何广强). Compact generation scheme of path-frequency hyperentangled photons using 2D periodical nonlinear photonic crystal[J]. 中国物理B, 2023, 32(12): 120307-120307.

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Compact generation scheme of path-frequency hyperentangled photons using 2D periodical nonlinear photonic crystal

Compact generation scheme of path-frequency hyperentangled photons using 2D periodical nonlinear photonic crystal

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