Autonomous quantum error correction of Gottesman-Kitaev-Preskill states
Dany Lachance-Quirion, Marc-Antoine Lemonde, Jean Olivier Simoneau,, Lucas St-Jean, Pascal Lemieux, Sara Turcotte, Wyatt Wright, Am\'elie Lacroix,, Jo\"elle Fr\'echette-Viens, Ross Shillito, Florian Hopfmueller, Maxime, Tremblay, Nicholas E. Frattini, Julien Camirand Lemyre
TL;DR
This paper demonstrates autonomous quantum error correction for GKP states in a superconducting system, significantly extending logical qubit lifetime by actively correcting photon loss errors.
Contribution
It introduces an experimental method for autonomous error correction of GKP states using reservoir engineering and auxiliary qubits in superconducting devices.
Findings
Logical qubit lifetime increased through error correction
Error correction surpasses error generation rate
Reservoir engineering enables autonomous correction
Abstract
The Gottesman-Kitaev-Preskill (GKP) code encodes a logical qubit into a bosonic system with resilience against single-photon loss, the predominant error in most bosonic systems. Here we present experimental results demonstrating quantum error correction of GKP states based on reservoir engineering of a superconducting device. Error correction is made autonomous through an unconditional reset of an auxiliary transmon qubit. The lifetime of the logical qubit is shown to be increased from quantum error correction, therefore reaching the point at which more errors are corrected than generated.
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Taxonomy
TopicsNeural Networks and Reservoir Computing · Quantum Information and Cryptography · Quantum many-body systems