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
Tags
photonic quantum entanglement
two-level emitter
nanophotonic waveguide
optical coupling
energy-time entanglement
Bell inequality
quantum technologies
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