Quantum logic and entanglement by neutral Rydberg atoms: methods and fidelity

TL;DR

This paper reviews methods for creating quantum gates and entanglement using neutral Rydberg atoms, focusing on their fidelity and robustness to improve their practical application in quantum information science.

Contribution

It provides a comprehensive review of various Rydberg-based entanglement protocols, analyzing their strengths, weaknesses, and factors affecting fidelity and robustness.

Findings

Analysis of different entangling gate methods

Assessment of fidelity and robustness factors

Guidelines for improving protocol performance

Abstract

Quantum gates and entanglement based on dipole-dipole interactions of neutral Rydberg atoms are relevant to both fundamental physics and quantum information science. The precision and robustness of the Rydberg-mediated entanglement protocols are the key factors limiting their applicability in experiments and near-future industry. There are various methods for generating entangling gates by exploring the Rydberg interactions of neutral atoms, each equipped with its own strengths and weaknesses. The basics and tricks in these protocols are reviewed, with specific attention paid to the achievable fidelity and the robustness to the technical issues and detrimental innate factors.