Super-correlated radiance in nonlinear photonic waveguides

Zhihai Wang, Tuomas Jaako, Peter Kirton, Peter Rabl

Research output: Contribution to journalArticle

Abstract

We study the collective decay of two-level emitters coupled to a nonlinear waveguide, for example, a nanophotonic lattice or a superconducting resonator array with strong photon-photon interactions. Under these conditions, a new decay channel into bound photon pairs emerges, through which spatial correlations between emitters are established by regular interference as well as interactions between the photons. We derive an effective Markovian theory to model the resulting decay dynamics of an arbitrary distribution of emitters and identify collective effects beyond the usual phenomena of super- and subradiance. Specifically, in the limit of many close-by emitters, we find that the system undergoes a supercorrelated decay process where all the emitters are either in the excited state or in the ground state but not in any of the intermediate states. The predicted effects can be probed in state-of-the-art waveguide QED experiments and provide a striking example of how the dynamics of open quantum systems can be modified by many-body effects in a nonharmonic environment.
Original languageEnglish
Article number213601
Number of pages7
JournalPhysical Review Letters
Volume124
Issue number21
DOIs
Publication statusPublished - 29 May 2020

Keywords

  • decay
  • photon-photon interactions
  • Markovian theory

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