Robust quantum switch with Rydberg excitations

TL;DR

This paper presents a robust quantum switch mechanism using Rydberg excitations in atoms, enabling reversible population exchange between Rydberg states with high efficiency and stability against disturbances, promising for quantum information processing.

Contribution

The authors propose a novel controllable quantum switch based on Rydberg interactions with demonstrated robustness and high efficiency, advancing Rydberg-based quantum technology applications.

Findings

Reversible exchange of Rydberg state populations achieved.

Switching scheme is robust against decay and environmental noise.

High switching efficiency demonstrated in simulations.

Abstract

We develop an approach to realize a quantum switch for Rydberg excitation in atoms with $Y$-typed level configuration. We find that the steady population on two different Rydberg states can be reversibly exchanged in a controllable way by properly tuning the Rydberg-Rydberg interaction. Moreover, our numerical simulations verify that the switching scheme is robust against spontaneous decay, environmental disturbance, as well as the duration of operation on the interaction, and also a high switching efficiency is quite attainable, which makes it have potential applications in quantum information processing and other Rydberg-based quantum technologies.