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Numerical approach to compound quantum repeater scheme with coherent states
I.O. Vorontsova 1,2, R.K. Goncharov 1,2, D.V. Tupyakov 1, F.D. Kiselev 1,2, V.I. Egorov 1,2

1 ITMO University, Leading Research Center "National Center of Quantum Internet",
199034, Saint Petersburg, Russia, Birzhevaya Line 16;
2 SMARTS-Quanttelecom LLC,
199178, Saint Petersburg, Russia, 6th Vasilyevskogo Ostrova Line 59

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DOI: 10.18287/2412-6179-CO-1322

Страницы: 81-85.

Язык статьи: English.

Аннотация:
A numerical model of a quantum repeater operating with Schrödinger cat states is constructed. The model describes the performance of such a system in the presence of decoherence effects, namely, noise in the quantum channel and the efficiency of the photon-number-resolving detector. In the framework of the numerical model, a theoretical analysis of the system functioning is carried out for the elementary link by calculating its performance characteristics. Namely, we calculate photodetector click probabilities and fidelity for various sets of decoherence parameters. These estimates are necessary in the context of further experimental research at the junction with other branches of quantum communications, so that to use the entanglement distribution when it comes to operating quantum teleportation and quantum key distribution protocols based on entanglement. The model will be developed further as a versatile drag-and-drop software simulating the full-fledged entanglement swapping protocol operation.

Ключевые слова:
quantum repeater, entanglement swapping, decoherence, quantum key distribution.

Благодарности
The work was done by Leading Research Center "National Center for Quantum Internet" of ITMO University supported by the Russian Science Foundation (project No. 24-21-00484).

Citation:
Vorontsova I, Goncharov R, Tupyakov D, Kiselev F, Egorov V. Numerical approach to compound quantum repeater scheme with coherent states. Computer Optics 2024; 48(1): 81-85. DOI: 10.18287/2412-6179-CO-1322.

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