Physics

Direct observation of a few-photon phase shift induced by a single quantum emitter in a waveguide

M. J. R. Staunstrup, A. Tiranov, et al.

This groundbreaking research by Mathias J. R. Staunstrup and colleagues unveils an optical phase shift of 0.19 ± 0.03 radians when a weak coherent state interacts with a single quantum dot in a nanophotonic waveguide. With implications for high-efficiency optical switching and quantum machine learning, this work paves the way for future advancements in photonic integrated circuitry.