# Resonant-interaction-induced Rydberg antiblockade

## TL;DR

This paper introduces a novel Rydberg antiblockade regime driven resonantly under strong Rydberg-Rydberg interactions, enabling simplified high-fidelity quantum gates without atomic addressability.

## Contribution

It demonstrates a new RAB regime driven by resonant, time-dependent Rabi frequencies under strong RRI, facilitating efficient quantum gate construction.

## Key findings

- Achieves RAB without weak RRI or dispersive compensation.
- Enables one-step high-fidelity CZ and CNOT gates.
- Reduces experimental complexity and resource requirements.

## Abstract

Different from the conventional Rydberg antiblockade (RAB) regime that either requires weak Rydberg-Rydberg interaction (RRI), or compensates Rydberg-Rydberg interaction (RRI)-induced energy shift by introducing dispersive interactions, we show that RAB regime can be achieved by resonantly driving the transitions between ground state and Rydberg state under strong RRI. The Rabi frequencies are of small amplitude and time-dependent harmonic oscillation, which plays a critical role for the presented RAB. The proposed unconventional RAB regime is used to construct high-fidelity controlled-Z (CZ) gate and controlled-not (CNOT) gate in one step. Each atom requires single external driving. And the atomic addressability is not required for the presented unconventional RAB, which would simplify experimental complexity and reduce resource consumption.