Nature, Published online: 11 March 2026; doi:10.1038/d41586-026-00724-4

Particles entangled over long distances can, in theory, improve the sensitivity of long-baseline interferometers that are observing weak thermal light sources. A proof-of-concept experiment now demonstrates entanglement-assisted interferometry, paving the way for entanglement-enhanced non‑local sensing techniques.

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