Work

Discrete-Modulation Continuous-Variable Quantum Key Distribution Enhanced by Quantum Scissors

Year: 2020

Type: article

Abstract: It is known that quantum scissors, as non-deterministic amplifiers, can enhance the performance of Gaussian-modulated continuous-variable quantum key distribution (CV-QKD) in noisy and long-distance regimes of operation. Here, we extend this result to a non-Gaussian CV-QKD protocol with discrete modulation. We show that, by using a proper setting, the use of quantum scissors in the receiver of such discrete-modulation CV-QKD protocols would allow us to achieve positive secret key rates at high loss and high excess noise regimes of operation, which would have been otherwise impossible. This also keeps the prospect of running discrete-modulation CV-QKD over CV quantum repeaters alive.

Source: IEEE Journal on Selected Areas in Communications

DOI: 10.1109/jsac.2020.2969058

Authors: Masoud Ghalaii, Carlo Ottaviani, Rupesh Kumar, Stefano Pirandola, Mohsen Razavi

Institutions: University of Leeds, University of York, Massachusetts Institute of Technology

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funder: Engineering and Physical Sciences Research Council

Awards: G2505040309, UK Quantum Technology Hub for Quantum Communications Technologies