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Quantum Foundations

Loophole-free Bell-inequality violation between atomic states in cavity-QED systems mediated by hybrid atom-light entanglement

arXiv

Authors: Pei-Zhe Li, Soumyakanti Bose, Hyunseok Jeong, William J. Munro, Kae Nemoto, Nicolò Lo Piparo

Year

2025

Paper ID

15848

Status

Preprint

Abstract Read

~2 min

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Abstract

We present a feasible and scalable approach to testing Bell nonlocality and implementing device-independent quantum key distribution (DI-QKD) between distant atomic states in cavity-based architectures, mediated by hybrid atom-light entanglement. We develop a full theoretical model that incorporates realistic sources of noise - such as transmission loss, limited light-matter coupling efficiency, and imperfect detection. Our analysis shows that strong Bell-Clauser-Horne-Shimony-Holt (CHSH) violations and secure key generation over tens of kilometers are within reach using current or near-term technology. These results position cavity-based platforms with coherent-state encodings as a promising foundation for future scalable, DI quantum communication networks.

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We present a feasible and scalable approach to testing Bell nonlocality and implementing device-independent quantum key distribution (DI-QKD) between distant atomic states in...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2512.10378 [2] arXiv https://arxiv.org/abs/2512.10378 [3] Publisher https://arxiv.org/abs/2512.10378

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