A Modulator-Free Quantum Key Distribution Transmitter Chip
Taofiq K. Para\"iso, Innocenzo De Marco, Thomas Roger, Davide G., Marangon, James F. Dynes, Marco Lucamarini, Zhiliang Yuan, Andrew J., Shields

TL;DR
This paper introduces a compact, scalable, and power-efficient quantum key distribution transmitter chip that encodes quantum signals at high rates without traditional modulators, advancing practical quantum communication networks.
Contribution
The authors present a novel modulator-free integrated quantum transmitter using injection-locking for high-speed phase encoding, improving scalability and energy efficiency.
Findings
Achieved record secure key rates under multiple protocols.
Demonstrated high-speed, power-efficient quantum encoding on a chip.
Enabled practical integration of quantum key distribution in networks.
Abstract
Quantum key distribution (QKD) has convincingly been proven compatible with real life applications. Its wide-scale deployment in optical networks will benefit from an optical platform that allows miniature devices capable of encoding the necessarily complex signals at high rates and with low power consumption. While photonic integration is the ideal route toward miniaturisation, an efficient route to high-speed encoding of the quantum phase states on chip is still missing. Consequently, current devices rely on bulky and high power demanding phase modulation elements which hinder the sought-after scalability and energy efficiency. Here we exploit a novel approach to high-speed phase encoding and demonstrate a compact, scalable and power efficient integrated quantum transmitter. We encode cryptographic keys on-demand in high repetition rate pulse streams using injection-locking with…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
