Quantum-information transfer in a coupled resonator waveguide

TL;DR

This paper presents a scheme for quantum information transfer in a one-dimensional coupled resonator waveguide, utilizing cavity-mediated dipole interactions and Raman transitions for direct end-to-end communication.

Contribution

It introduces a novel one-step protocol for quantum information transfer in a coupled resonator system, enhancing quantum communication efficiency.

Findings

Quantum information can be transferred directly between waveguide ends.

The scheme leverages cavity-mediated dipole-dipole interactions.

It enables Raman-based quantum state transfer without intermediate nodes.

Abstract

We propose an efficient scheme for the implementation of quantum information transfer in a onedimensional coupled resonator waveguide. We show that, based on the effective long-range dipole-dipole interactions between the atoms mediated by the cavity modes, Raman transitions between the atoms trapped in different nodes can take place. Quantum information could be transferred directly between the opposite ends of the coupled waveguide without involving the intermediate nodes via either Raman transitions or the stimulated Raman adiabatic passages. Since this scheme, in principle, is a one-step protocol, it may provide useful applications in quantum communications.