Multi-partite entanglement in extreme nanophotonic cavities
File(s)
Published version
Author(s)
Crookes, Angus
Yuen, Ben
Hanham, Stephen M
Demetriadou, Angela
Type
Journal Article
Abstract
Multi-partite entanglement is fundamental to emerging quantum technologies, such as quantum networks, which ultimately require devices with strong light–matter interactions and long coherence times. Here, we introduce nanobeam photonic crystal cavities combining both extreme quality factors (∼107) with sub-wavelength field confinement to reach unprecedented light–matter interactions. Operating at 780 nm, our devices are tailored for efficient coupling and entanglement with ultracold 87Rb atoms, a key ingredient in quantum networks due to their hyperfine structure. Our new designs also facilitate the precise optical trapping of atoms, and we demonstrate coherent entanglement generation between them, which is remarkably resilient to atomic displacements. These platforms can be easily scaled-up to extremely large quantum networks, for distributed quantum computing and future light-based quantum technologies.
Date Issued
2025-12-01
Date Acceptance
2025-11-26
Citation
APL Quantum, 2025, 2 (4)
ISSN
2835-0103
Publisher
AIP Publishing LLC
Journal / Book Title
APL Quantum
Volume
2
Issue
4
Copyright Statement
© 2025 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
License URL
Publication Status
Published
Article Number
046115
Date Publish Online
2025-12-17