Affiliation:
1. School of Mathematical and Physical Sciences, Faculty of Science University of Technology Sydney Ultimo New South Wales 2007 Australia
2. School of Electrical Engineering and Telecommunications The University of New South Wales Sydney NSW 2052 Australia
3. ARC Centre of Excellence for Transformative Meta‐Optical Systems Faculty of Science University of Technology Sydney Ultimo New South Wales 2007 Australia
Abstract
AbstractQuantum key distribution (QKD) is considered the most immediate application to be widely implemented among a variety of potential quantum technologies. QKD enables sharing secret keys between distant users by using photons as information carriers. An ongoing endeavor is to implement these protocols in practice in a robust, and compact manner so as to be efficiently deployable in a range of real‐world scenarios. Single photon sources (SPS) in solid‐state materials are prime candidates in this respect. This article demonstrates a room temperature, discrete‐variable quantum key distribution system using a bright single photon source in hexagonal‐boron nitride, operating in free‐space. Employing an easily interchangeable photon source system, keys with one million bits length, and a secret key of approximately 70000 bits, at a quantum bit error rate of 6%, with ε‐security of 10−10 are generated. This study demonstrates the first proof of concept finite‐key BB84 QKD system realized with hBN defects.
Funder
Australian Research Council
Office of Naval Research Global
Subject
Electrical and Electronic Engineering,Computational Theory and Mathematics,Condensed Matter Physics,Mathematical Physics,Nuclear and High Energy Physics,Electronic, Optical and Magnetic Materials,Statistical and Nonlinear Physics
Cited by
18 articles.
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