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.

中文翻译：

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纳米光子波导中单量子点的几光子非线性散射矩阵的实验重建

相干光子-发射极接口提供了一种介导量子信息处理非常需要的有效非线性光子-光子相互作用的方法。在这里，我们通过实验研究在纳米光子波导中耦合到单光学模式的两级发射器（量子点）的情况。我们进行了几个光子传输实验，并记录了光的统计数据，以重构一光子组件和二光子组件的散射矩阵元素。这提供了对包含丰富多体物理学的复杂非线性光子相互作用的直接见解。