Optimized readout strategies for neutral atom quantum processors

TL;DR

This paper develops a theoretical framework and optimized readout strategies for neutral atom quantum processors, balancing fidelity and retention to enhance system throughput and practical scalability.

Contribution

It introduces a new metric for quantum circuit iteration rate and demonstrates optimized readout strategies tailored for 87Rb atom systems.

Findings

Achieves qCIRs of 197.2Hz with single photon detectors

Achieves qCIRs of 154.5Hz with cameras

Provides practical guidelines for scalable quantum processor design

Abstract

Neutral atom quantum processors have emerged as a promising platform for scalable quantum information processing, offering high-fidelity operations and exceptional qubit scalability. A key challenge in realizing practical applications is efficiently extracting readout outcomes while maintaining high system throughput, i.e., the rate of quantum task executions. In this work, we develop a theoretical framework to quantify the trade-off between readout fidelity and atomic retention. Moreover, we introduce a metric of quantum circuit iteration rate (qCIR) and employ normalized quantum Fisher information to characterize system overall performance. Further, by carefully balancing fidelity and retention, we demonstrate a readout strategy for optimizing information acquisition efficiency. Considering the experimentally feasible parameters for 87Rb atoms, we demonstrate that qCIRs of 197.2Hz and 154.5Hz are achievable using single photon detectors and cameras, respectively. These results provide practical guidance for constructing scalable and high-throughput neutral atom quantum processors for applications in sensing, simulation, and near-term algorithm implementation.