Implications of exceptional points for few-photon transport in waveguide quantum electrodynamics
Quantum Physics
2019-06-12 v1
Abstract
We identify a general connection between the physics of exceptional points in non-Hermitian systems and the few-photon bound states in waveguide quantum electrodynamics (QED) systems. We show that, in waveguide QED systems where the local quantum system exhibits an exceptional point, the tightest-bound few-photon bound state occurs at the exceptional point. We illustrate this connection with an explicit computation on a waveguide QED system in which a waveguide is coupled to a Jaynes-Cummings system. Our result provides a quantum signature of the exceptional point physics and indicates that the physics of exceptional point can be used to understand and control the photon-photon interaction.
Cite
@article{arxiv.1806.11279,
title = {Implications of exceptional points for few-photon transport in waveguide quantum electrodynamics},
author = {Shanshan Xu and Shanhui Fan},
journal= {arXiv preprint arXiv:1806.11279},
year = {2019}
}