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13 March 2024 Quantum communication protocols based on time-entangled photonic qudits
Stefania Sciara, Hao Yu, Mario Chemnitz, Nicola Montaut, Bennet Fischer, Robin Helsten, Benjamin Crockett, Benjamin Wetzel, Thorsten Albert Goebel, Ria Kraemer, Brent E. Little, Sai T. Chu, Stefan Nolte, Zhiming Wang, Jose Azaña, William J. Munro, David J. Moss, Roberto Morandotti
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Proceedings Volume PC12911, Quantum Computing, Communication, and Simulation IV; PC129111E (2024) https://doi.org/10.1117/12.3005444
Event: SPIE Quantum West, 2024, San Francisco, California, United States
Abstract
Time-entanglement is a promising resource for the implementation of quantum communications over standard fiber networks. In particular, photonic qudits can enhance the performance of quantum communication, including quantum key distribution, in terms of noise robustness, quantum information content, distance reach, as well as security and secret key rates. However, time-entangled photonic qudits are not ready yet to be fully exploited for quantum communications in fiber networks that are fully compatible with standard telecommunication architecture. Here, we demonstrate the implementation of telecommunication-compatible quantum communications based on picosecond-spaced time-entangled qudits. To this end, we make use of an integrated photonic chip comprising a cascade of programmable interferometers and a spiral waveguide. We use entangled qudits to implement high-speed quantum key distribution, chip-to-chip entanglement distribution, and quantum state propagation over 60 km of standard fiber. Our results show the potential of time-entangled qudits for high-speed quantum communications in telecommunication-compatible architecture.
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Stefania Sciara, Hao Yu, Mario Chemnitz, Nicola Montaut, Bennet Fischer, Robin Helsten, Benjamin Crockett, Benjamin Wetzel, Thorsten Albert Goebel, Ria Kraemer, Brent E. Little, Sai T. Chu, Stefan Nolte, Zhiming Wang, Jose Azaña, William J. Munro, David J. Moss, and Roberto Morandotti "Quantum communication protocols based on time-entangled photonic qudits", Proc. SPIE PC12911, Quantum Computing, Communication, and Simulation IV, PC129111E (13 March 2024); https://doi.org/10.1117/12.3005444
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KEYWORDS
Quantum communication protocols
Picosecond phenomena
Quantum communications
Quantum processes
Quantum states
Telecommunications
Quantum entanglement
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