Abstract
Encoding quantum information via time-bin entangled states has had a profound impact on the development of quantum communications. However, dispersive propagation limits their achievable transmission distances. Here we describe a regime for nonlocal dispersion cancellation where the sum of arrival times of photons undergoing identical dispersion remains highly correlated. We exploit this effect to mitigate dispersive effects in a quantum key distribution fiber link, allowing an increase in the secret key rate by over a factor of 5 after 80 km of optical fiber dispersion. © 2025 authors. Published by the American Physical Society.
| Original language | English |
|---|---|
| Article number | 220801 |
| Number of pages | 7 |
| Journal | Physical Review Letters |
| Volume | 134 |
| Issue number | 22 |
| Online published | 5 Jun 2025 |
| DOIs | |
| Publication status | Published - 6 Jun 2025 |
Funding
This work is supported by Fonds de recherche du Québec—Nature et technologies (FRQNT); Natural Sciences and Engineering Research Council of Canada (NSERC); Joint program of the NSERC and the European Commission (HyperSpace 101070168); AQUA ALLRP 587602-23; QuEnSi ALLRP 578468-22; Consortium on Integrated Quantum Photonics with Ferroelectric Materials ALLRP 587352-23; Joint programs of NSERC Alliance and Innovative UK “Call for joint Canada-UK projects on Quantum Technologies (QT)” (ALLRP 556324-2020 and 556325-2020).
Research Keywords
- Quantum communication
- nonlocality
- quantum channels
- entanglement manipulation
- quantum control
- quantum correlations in quantum information
Publisher's Copyright Statement
- This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/
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