Quantum cryptography with a single photon source

Edo Waks; Kyo Inoue; Charles Santori; David Fattal; Jelena Vuckovic; Glenn S. Solomon; Yoshihisa Yamamoto

doi:10.1117/12.512319

3 February 2004 Quantum cryptography with a single-photon source

Edo Waks, Kyo Inoue, Charles Santori, David Fattal, Jelena Vuckovic, Glenn S. Solomon, Yoshihisa Yamamoto

Proceedings Volume 5161, Quantum Communications and Quantum Imaging; (2004) https://doi.org/10.1117/12.512319
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Quantum cryptography is a method to exchange secret messages with unconditional security over a potentially hostile environment using single photons. Previous implementations of quantum cryptography have relied on highly attenuated laser light to approximate single photo states. Such sources are vulnerable to eavesdropping attacks based on photon splitting. Here we present an experimental demonstration of quantum cryptography using a single photon source based on Indium Arsenide quantum dots. We achieve a communication rate of 25kbits/s. This source allows secure communication over a quantum channel with up to 28dB of channel loss, as opposed to only 23dB for an attenuated laser.

Citation Download Citation

Edo Waks, Kyo Inoue, Charles Santori, David Fattal, Jelena Vuckovic, Glenn S. Solomon, and Yoshihisa Yamamoto "Quantum cryptography with a single-photon source", Proc. SPIE 5161, Quantum Communications and Quantum Imaging, (3 February 2004); https://doi.org/10.1117/12.512319

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