Efficient room-temperature molecular single-photon sources for quantum key distribution

Ghulam Murtaza; Maja Colautti; Michael Hilke; Pietro Lombardi; Francesco Saverio Cataliotti; Alessandro Zavatta; Davide Bacco; Costanza Toninelli

doi:10.1364/OE.476440

Efficient room-temperature molecular single-photon sources for quantum key distribution

Ghulam Murtaza, Maja Colautti^*, Michael Hilke, Pietro Lombardi, Francesco Saverio Cataliotti, Alessandro Zavatta, Davide Bacco, Costanza Toninelli

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

Quantum key distribution (QKD) allows the distribution of cryptographic keys between multiple users in an information-theoretic secure way, exploiting quantum physics. While current QKD systems are mainly based on attenuated laser pulses, deterministic single-photon sources could give concrete advantages in terms of secret key rate (SKR) and security owing to the negligible probability of multi-photon events. Here, we introduce and demonstrate a proof-of-concept QKD system exploiting a molecule-based single-photon source operating at room temperature and emitting at 785 nm. With an estimated maximum SKR of 0.5 Mbps, our solution paves the way for room-temperature single-photon sources for quantum communication protocols.

Original language	English
Journal	Optics Express
Volume	31
Issue number	6
Pages (from-to)	9437-9447
ISSN	1094-4087
DOIs	https://doi.org/10.1364/OE.476440
Publication status	Published - 13 Mar 2023

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AU - Cataliotti, Francesco Saverio

AU - Zavatta, Alessandro

AU - Bacco, Davide

AU - Toninelli, Costanza

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AB - Quantum key distribution (QKD) allows the distribution of cryptographic keys between multiple users in an information-theoretic secure way, exploiting quantum physics. While current QKD systems are mainly based on attenuated laser pulses, deterministic single-photon sources could give concrete advantages in terms of secret key rate (SKR) and security owing to the negligible probability of multi-photon events. Here, we introduce and demonstrate a proof-of-concept QKD system exploiting a molecule-based single-photon source operating at room temperature and emitting at 785 nm. With an estimated maximum SKR of 0.5 Mbps, our solution paves the way for room-temperature single-photon sources for quantum communication protocols.

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Efficient room-temperature molecular single-photon sources for quantum key distribution

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