Demonstration of Erasure Conversion in a Molecular Tweezer Array

TL;DR

This paper demonstrates site-resolved detection and erasure conversion techniques in molecular tweezer arrays, significantly improving error detection and correction capabilities for quantum simulation and information processing.

Contribution

It introduces a new detection scheme for site-resolved errors and demonstrates mid-circuit erasure detection and conversion in molecules, advancing quantum error correction methods.

Findings

Enhanced tweezer array preparation fidelities

Mid-circuit erasure detection in molecules

Conversion of blackbody errors into detectable erasures

Abstract

Programmable optical tweezer arrays of molecules are an emerging platform for quantum simulation and quantum information science. For these applications, reducing and mitigating errors that arise during initial state preparation and subsequent evolution remain major challenges. In this paper, we present work on site-resolved detection of internal state errors and quantum erasures, which are qubit errors with known locations. First, using a new site-resolved detection scheme, we demonstrate robust and enhanced tweezer array preparation fidelities. This enables creating molecular arrays with low defect rates, opening the door to high-fidelity simulation of quantum many-body systems. Second, for the first time in molecules, we demonstrate mid-circuit detection of erasures using a composite detection scheme that minimally affects error-free qubits. We also demonstrate mid-circuit conversion of blackbody-induced errors into detectable erasures. Our demonstration of erasure conversion, which has been shown to significantly reduce overheads for fault-tolerant quantum error correction, could be useful for quantum information processing in molecular tweezer arrays.