Few-photon transport via a multimode nonlinear cavity: Theory and applications

Yunkai Wang, Kejie Fang

Research output: Contribution to journalArticlepeer-review


Few-photon transport via waveguide-coupled local quantum systems has attracted extensive theoretical and experimental studies. Most of the study has focused on atomic or atomic-like local quantum systems due to their strong light-matter interaction useful for quantum applications. Here we study few-photon transport via a waveguide-coupled multimode optical cavity with second-order bulk nonlinearity. We develop a Feynman diagram approach and compute the scattering matrix of the one- and two-photon transport. Based on the calculated scattering matrix, we show highly nonclassical photonic effects, including photon blockade and π-conditional phase shift, are achievable in the waveguide-coupled multimode optical cavity system via quantum interference and linear response engineering. Our results might lead to significant applications of quantum photonic circuits in all-optical quantum information processing and quantum network protocols.

Original languageEnglish (US)
Article number023713
JournalPhysical Review A
Issue number2
StatePublished - Feb 2022

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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