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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 |
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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.
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Received: 02 August 2023
Revised: 18 October 2023
Accepted manuscript online: 24 October 2023
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PACS:
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03.67.Bg
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(Entanglement production and manipulation)
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42.65.Lm
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(Parametric down conversion and production of entangled photons)
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| Fund: 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). |
Corresponding Authors:
Guang-Qiang He
E-mail: gqhe@sjtu.edu.cn
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Cite this article:
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 2023 Chin. Phys. B 32 120307
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