Physics

Violation of Bell inequality by photon scattering on a two-level emitter

S. Liu, O. A. D. Sandberg, et al.

This groundbreaking research by Shikai Liu and colleagues unveils the generation of photonic quantum entanglement using a single two-level emitter in a nanophotonic waveguide. Their innovative approach harnesses efficient optical coupling to create energy-time entanglement, marking a significant step for quantum technology.

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Abstract

This paper demonstrates the generation of photonic quantum entanglement using a single two-level emitter coupled to light in a nanophotonic waveguide. Efficient optical coupling mediates two-photon interactions, creating strong nonlinearity that leads to energy-time entanglement. Experimental violation of a Bell inequality confirms the entanglement. The method uses a passive scatterer, requiring no advanced spin control, and offers a potentially more efficient approach to synthesizing photonic entangled states for quantum technologies.

Publisher

Nature Physics

Published On

Sep 01, 2024

Authors

Shikai Liu, Oliver August Dall’Alba Sandberg, Ming Lai Chan, Björn Schrinski, Yiouli Anyfantaki, Rasmus B. Nielsen, Robert G. Larsen, Andrei Skalkin, Ying Wang, Leonardo Midolo, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Anders S. Sørensen, Alexey Tiranov, Peter Lodahl

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