Quantum information processing with single photons and atomic ensembles in microwave coplanar waveguide resonators

TL;DR

This paper demonstrates how Rydberg-excited atoms coupled via microwave resonators can generate single photons and implement quantum gates, advancing scalable quantum information processing with hybrid atomic-photonic systems.

Contribution

It introduces a method for using cavity-mediated interactions between Rydberg atoms to produce single photons and perform quantum gates in a scalable setup.

Findings

Effective long-range interactions enable photon generation.

Implementation of a universal phase gate between photon pulses.

Potential for scalable quantum information processing.

Abstract

We show that pairs of atoms optically excited to the Rydberg states can strongly interact with each other via effective long-range dipole-dipole or van der Waals interactions mediated by their non-resonant coupling to a common microwave field mode of a superconducting coplanar waveguide cavity. These cavity mediated interactions can be employed to generate single photons and to realize in a scalable configuration a universal phase gate between pairs of single photon pulses propagating or stored in atomic ensembles in the regime of electromagnetically induced transparency.