Free-Space Quantum Teleportation with Orbital Angular Momentum Multiplexed Continuous Variable Entanglement

Xinchao Ruan, Hang Zhang, Wenqi Peng, Hui Xian, Yiwu Zhu, Wei Zhao () and Sha Xiong ()
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Xinchao Ruan: School of Automation, Central South University, Changsha 410083, China
Hang Zhang: School of Automation, Central South University, Changsha 410083, China
Wenqi Peng: School of Automation, Central South University, Changsha 410083, China
Hui Xian: School of Automation, Central South University, Changsha 410083, China
Yiwu Zhu: School of Automation, Central South University, Changsha 410083, China
Wei Zhao: Key Laboratory of Computing Power Network and Information Security, Ministry of Education, Shandong Computer Science Center (National Supercomputer Center in Jinan), Qilu University of Technology (Shandong Academy of Sciences), Jinan 250316, China
Sha Xiong: School of Automation, Central South University, Changsha 410083, China

Mathematics, 2023, vol. 11, issue 14, 1-17

Abstract: Quantum teleportation is one of the fundamental primitives of quantum cryptography. In order to achieve a wider range of high-capacity information transfer, we propose a free-space quantum teleportation (QT) protocol with orbital angular momentum (OAM) multiplexed continuous variable (CV) entangled states. The preparation of the entangled states is accomplished by the spontaneous four-wave mixing (SFWM) process occurring in a hot 85 Rb vapor cell, and the mode selection for the Bell-state measurement is achieved by employing the balanced homodyne detection technique. The fidelity of teleporting EPR entangled states carrying different topological charges via a Kolmogorov-type atmospheric turbulence channel is derived, and the superiority of enhancing the system channel capacity via OAM multiplexing is demonstrated. Our work provides a feasible scheme to implement high-capacity quantum communication in atmospheric environments.

Keywords: quantum teleportation; orbital angular momentum; free space; continuous variable (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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