Numerical assessment and optimization of discrete-variable time-frequency quantum key distribution

Roediger J, Perlot N, Mottola R, Elschner R, Weinert CM, Benson O, Freund R (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Physical Review A American Physical Society

Book Volume: 95

Article Number: 052312

Journal Issue: 5

DOI: 10.1103/PhysRevA.95.052312

Abstract

The discrete-variables (DV) time-frequency (TF) quantum key distribution (QKD) protocol is a BB84-like protocol, which utilizes time and frequency as complementary bases. As orthogonal modulations, pulse position modulation (PPM) and frequency shift keying (FSK) are capable of transmitting several bits per symbol, i.e., per photon. However, unlike traditional binary polarization shift keying, PPM and FSK do not allow perfectly complementary bases. So information is not completely deleted when the wrong-basis filters are applied. Since a general security proof does not yet exist, we numerically assess DV-TF-QKD. We show that the secret key rate increases with a higher number of symbols per basis. Further we identify the optimal pulse relations in the two bases in terms of key rate and resistance against eavesdropping attacks.

Involved external institutions

Fraunhofer-Institut für Nachrichtentechnik (Heinrich-Hertz-Institut FhG HHI) DE Germany (DE) Humboldt-Universität zu Berlin DE Germany (DE)

How to cite

APA:

Roediger, J., Perlot, N., Mottola, R., Elschner, R., Weinert, C.-M., Benson, O., & Freund, R. (2017). Numerical assessment and optimization of discrete-variable time-frequency quantum key distribution. Physical Review A, 95(5). https://doi.org/10.1103/PhysRevA.95.052312

MLA:

Roediger, Jasper, et al. "Numerical assessment and optimization of discrete-variable time-frequency quantum key distribution." Physical Review A 95.5 (2017).

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