Continuous variable distributed quantum sensing in integrated photonics
Abstract
Distributed quantum sensing is an emerging application of quantum networking, where entangled probe states are employed to sense combinations of delocalized parameters with enhanced precision relative to using separable states. Squeezed states of light are a prime resource for experimental demonstrations of entanglement-enhanced sensing, because they can be generated and entangled deterministically. Existing distributed quantum sensing experiments have been fundamentally limited in scalability due to their bulk-optic architectures. Meanwhile, integrated photonics provides a scalable and compact platform for quantum sensors. Here we demonstrate entanglement-enhanced sensing of linear functions of four phase shifts in an integrated photonic circuit. We find an entanglement-enhanced precision of 0.199(16) dB below the shot noise limit compared to 0.041(18) dB for separable states. A four-mode entangled state is generated on-chip with entanglement verification and phase sensing also performed on-chip with an array of four integrated homodyne detectors.
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BibTeX
@misc{puzio2026continuous,
title = {{Continuous variable distributed quantum sensing in integrated photonics}},
author = {Bethany Puzio and Oliver M. Green and Joel F. Tasker and Jonathan Frazer and Tamzin Ellis and Benjamin D. J. Sayers and Rachel N. Clark and Alex S. Clark and Giacomo Ferranti and Jonathan C. F. Matthews},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.19092},
eprint = {2609.19092},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.19092},
}
RIS
TY - UNPB
TI - Continuous variable distributed quantum sensing in integrated photonics
AU - Bethany Puzio
AU - Oliver M. Green
AU - Joel F. Tasker
AU - Jonathan Frazer
AU - Tamzin Ellis
AU - Benjamin D. J. Sayers
AU - Rachel N. Clark
AU - Alex S. Clark
AU - Giacomo Ferranti
AU - Jonathan C. F. Matthews
PY - 2026
DA - 2026/09/16
PB - arXiv
DO - 10.48550/arxiv.2609.19092
UR - https://arxiv.org/abs/2609.19092
AB - Distributed quantum sensing is an emerging application of quantum networking, where entangled probe states are employed to sense combinations of delocalized parameters with enhanced precision relative to using separable states. Squeezed states of light are a prime resource for experimental demonstrations of entanglement-enhanced sensing, because they can be generated and entangled deterministically. Existing distributed quantum sensing experiments have been fundamentally limited in scalability due to their bulk-optic architectures. Meanwhile, integrated photonics provides a scalable and compact platform for quantum sensors. Here we demonstrate entanglement-enhanced sensing of linear functions of four phase shifts in an integrated photonic circuit. We find an entanglement-enhanced precision of 0.199(16) dB below the shot noise limit compared to 0.041(18) dB for separable states. A four-mode entangled state is generated on-chip with entanglement verification and phase sensing also performed on-chip with an array of four integrated homodyne detectors.
ER -