Single-Operation Rydberg Phase Gates via Dynamic Population Suppression

TL;DR

This paper introduces a control protocol that suppresses Rydberg excitation to enable fast, high-fidelity entangling gates in neutral-atom quantum computing, overcoming finite-blockade errors.

Contribution

A novel dynamic suppression technique for Rydberg excitation that allows perfect entangling phase gates regardless of blockade strength.

Findings

Enables single-step entangling gates with high fidelity

Eliminates finite-blockade errors at high Rabi frequencies

Compatible with various neutral-atom quantum architectures

Abstract

We propose a versatile control protocol based on modulated zero-pulse-area fields that dynamically suppresses Rydberg excitation while retaining Rydberg-Rydberg interactions as an entangling phase resource. This mechanism enables single-step, perfectly entangling phase gates for arbitrary blockade strengths, eliminating finite-blockade errors even when the Rabi frequency approaches or exceeds the interaction energy. The approach defines a new operational regime for Rydberg-blockade quantum logic in which speed, fidelity, and robustness are achieved simultaneously within a simple dynamical framework. Owing to its simplicity and generality, the technique is compatible with a wide range of neutral-atom architectures and offers a promising route toward scalable, high-fidelity quantum computation and simulation.