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arXiv · 2510.16230

Phase-Stable Optical Fiber Links for Quantum Network Protocols

Nicholas V. Nardelli·Dileep V. Reddy·Michael Grayson·Daniel Sorensen·Martin J. Stevens·Michael D. Mazurek·L. Krister Shalm·Tara M. Fortier
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Abstract

We demonstrate the distribution of single-photon-level pulses from a mode-locked laser source over a phase-stable fiber link, achieving an optical timing jitter of less than 100 as over 10 minutes of data accumulation. This stability enables a fidelity greater than 0.998 between two stabilized 2.1 km long deployed fiber links. Building on time and frequency metrology techniques traditionally used for high-stability optical atomic clock signal distribution, we use time and frequency multiplexing to achieve an isolation of quantum and classical channels of $8 \times 10^{10}$. Our results mark a necessary step towards scalable, high-rate quantum networks with a provable quantum advantage.

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Nicholas V. Nardelli, Dileep V. Reddy, Michael Grayson, Daniel Sorensen, Martin J. Stevens, Michael D. Mazurek, L. Krister Shalm, Tara M. Fortier. 2025-10-17. Phase-Stable Optical Fiber Links for Quantum Network Protocols. https://arxiv.org/abs/2510.16230

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