Experimental Reconstruction of the Few-Photon Nonlinear Scattering Matrix from a Single Quantum Dot in a Nanophotonic Waveguide

Authors: Le Jeannic, Hanna; Ramos, Tomas; Simonsen, Signe F.; Pregnolato, Tommaso; Liu, Zhe; Schott, Ruediger; Wieck, Andreas D.; Ludwig, Arne; Rotenberg, Nir; Jose Garcia-Ripoll, Juan; Lodahl, Peter

Journal: PHYSICAL REVIEW LETTERS

Publication date: 2021/01/13

DOI: 10.1103/PhysRevLett.126.023603

Abstract: Coherent photon-emitter interfaces offer a way to mediate efficient nonlinear photon-photon interactions, much needed for quantum information processing. Here we experimentally study the case of a two-level emitter, a quantum dot, coupled to a single optical mode in a nanophotonic waveguide. We carry out few-photon transport experiments and record the statistics of the light to reconstruct the scattering matrix elements of one- and two-photon components. This provides direct insight to the complex nonlinear photon interaction that contains rich many-body physics.