Phase-Stable Optical Fiber Links for Quantum Network Protocols

• URL: http://arxiv.org/abs/2510.16230v1
• Date: Fri, 17 Oct 2025 21:43:18 GMT
• Title: Phase-Stable Optical Fiber Links for Quantum Network Protocols
• Authors: Nicholas V. Nardelli, Dileep V. Reddy, Michael Grayson, Daniel Sorensen, Martin J. Stevens, Michael D. Mazurek, L. Krister Shalm, Tara M. Fortier,
• Abstract summary: We demonstrate the distribution of single-photon-level pulses from a mode-locked laser source over a phase-stable fiber link.<n>Our results mark a necessary step towards scalable, high-rate quantum networks with a provable quantum advantage.
• Score: 0.7026564887314537
• License: http://creativecommons.org/licenses/by/4.0/
• 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 by better than $10^{10}$. Our results mark a necessary step towards scalable, high-rate quantum networks with a provable quantum advantage.

Related papers

• Co-Propagation of Quantum Time Synchronization and Optical Frequency Transfer over a 122 km Hollow-Core Fiber [14.5098510756184]
  Co-propagation of quantum and classical signals through shared optical fibers is crucial for scalable quantum networks.<n>Here, we overcome this long-standing challenge by leveraging the inherently ultralow nonlinearity of hollow-core fiber (HCF) to suppress SpRS noise.<n>We successfully demonstrate their simultaneous transmission over a 122-km link.
  arXiv  Detail & Related papers  (2026-02-22T02:59:32Z)
• Integrated polarization-entangled photon source for wavelength-multiplexed quantum networks [49.82426139329382]
  We present a simple yet high-performance on-chip polarization-entangled photon-pair source on thin-film lithium niobate (TFLN)<n>Our device employs dual quasi-phase matching (D-QPM) that sequentially supports type-0 and type-I spontaneous parametric down-conversion in a single nanophotonic waveguide.<n>We realize wavelength-multiplexed entanglement distribution in a four-user quantum network deployed over metropolitan fiber links up to 50 km.
  arXiv  Detail & Related papers  (2025-11-27T18:30:01Z)
• Hong-Ou-Mandel Interference with a Coexisting Clock using Transceivers for Synchronization over Deployed Fiber [7.485793859717425]
  Interference between independently generated photons is a key step towards distributing entanglement over long distances. Here, we demonstrate photon-photon interference by observing the Hong-Ou-Mandel dip between two distantly-located sources. We achieve a maximum dip visibility of $0.58 pm 0.04$ when the two sources are connected via $4.3$ km of deployed fiber.
  arXiv  Detail & Related papers  (2024-07-01T12:16:35Z)
• Metropolitan-scale Entanglement Distribution with Co-existing Quantum and Classical Signals in a single fiber [0.0]
  Development of prototype metropolitan-scale quantum networks involves transmitting quantum information via deployed optical fibers. One approach addressing these challenges is to co-propagate classical probe signals in the same fiber as the quantum signal. Here, we demonstrate the distribution of polarization entangled quantum signals co-propagating with the White Rabbit Precision Time Protocol (WR-PTP) classical signals in the same single-core fiber strand at metropolitan-scale distances.
  arXiv  Detail & Related papers  (2024-02-01T14:21:39Z)
• Hyper-entanglement between pulse modes and frequency bins [101.18253437732933]
  Hyper-entanglement between two or more photonic degrees of freedom (DOF) can enhance and enable new quantum protocols. We demonstrate the generation of photon pairs hyper-entangled between pulse modes and frequency bins.
  arXiv  Detail & Related papers  (2023-04-24T15:43:08Z)
• High-rate sub-GHz linewidth bichromatic entanglement source for quantum networking [59.191830955730346]
  In this work, we study an entanglement source based on four-wave mixing in a diamond configuration in a warm rubidium vapor. We are able to achieve in-fiber entangled pair generation rates greater than $107, /s$, orders of magnitude higher than previously reported atomic sources.
  arXiv  Detail & Related papers  (2023-04-11T21:19:30Z)
• Towards Fully Passive Time-Bin Quantum Key Distribution over Moving Free-Space Channels [36.136619420474766]
  Quantum information in photonic time-bin states is typically considered impractical for moving free-space quantum communication.<n>We demonstrate a novel approach using reference frame independent time-bin quantum key distribution.<n>The scheme can be readily applied over various spatially multi-mode and fluctuating channels involving rapidly moving platforms.
  arXiv  Detail & Related papers  (2023-02-10T03:53:21Z)
• Ultrabright and narrowband intra-fiber biphoton source at ultralow pump power [51.961447341691]
  Nonclassical photon sources of high brightness are key components of quantum communication technologies. We here demonstrate the generation of narrowband, nonclassical photon pairs by employing spontaneous four-wave mixing in an optically-dense ensemble of cold atoms within a hollow-core fiber.
  arXiv  Detail & Related papers  (2022-08-10T09:04:15Z)
• Distributing Polarization Entangled Photon Pairs with High Rate over Long Distance through Standard Telecommunication Fiber [0.0]
  Entanglement distribution over long distances is essential for many quantum communication schemes. We present entanglement distribution over 50km of standard telecommunication fiber with pair rate more than 10,000 s$-1$ using a bright non-degenerate photon pair source.
  arXiv  Detail & Related papers  (2022-04-22T08:40:19Z)
• GHz-Pulsed Source of Entangled Photons for Reconfigurable Quantum Networks [0.0]
  Entanglement is a universal resource in quantum networks, yet entangled photon sources are typically custom-made for a specific use case. Here, we report on a flexible source design that produces high-quality entanglement in continuous-wave and GHz-rate-pulsed operation modes.
  arXiv  Detail & Related papers  (2022-01-21T17:52:52Z)
• Telecom-band Hyperentangled Photon Pairs from a Fiber-based Source [49.06242674127539]
  We experimentally demonstrate the generation of telecom-band biphotons hyperentangled in both the polarization and frequency DoFs. The states produced by our hyperentanglement source can enable protocols such as dense coding and high-dimensional quantum key distribution.
  arXiv  Detail & Related papers  (2021-12-06T21:37:43Z)
• Spectral multiplexing of telecom emitters with stable transition frequency [68.8204255655161]
  coherent emitters can be entangled over large distances using photonic channels. We observe around 100 individual erbium emitters using a Fabry-Perot resonator with an embedded 19 micrometer thin crystalline membrane. Our results constitute an important step towards frequency-multiplexed quantum-network nodes operating directly at a telecommunication wavelength.
  arXiv  Detail & Related papers  (2021-10-18T15:39:07Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.