Photon blockade induced by atoms with Rydberg coupling

TL;DR

This paper analyzes how Rydberg-coupled atoms in a waveguide induce photon blockade, revealing resonance-dependent photon correlations and the impact of Rydberg interaction strength on photon statistics.

Contribution

It provides an analytic solution for two-photon scattering in a Rydberg atom waveguide system and explores the resonance-dependent photon correlation effects.

Findings

Photon bunching and antibunching observed under single-photon resonance.

Photon correlation effects intensify with increased Rydberg coupling.

Bunching-antibunching transition occurs at two-photon resonance.

Abstract

We study the photon blockade of two-photon scattering in a one-dimensional waveguide, which contains two atoms coupled via the Rydberg interaction. We obtain the analytic scattering solution of photonic wave packets with the Laplace transform method. We examine the photon correlation by addressing the two-photon relative wave function and the second-order correlation function in the single- and two-photon resonance cases. It is found that, under the single-photon resonance condition, photon bunching and antibunching can be observed in the two-photon transmission and reflection, respectively. In particular, the bunching and antibunching effects become stronger with the increasing of the Rydberg coupling strength. In addition, we find a phenomenon of bunching-antibunching transition caused by the two-photon resonance.