Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines cond-mat
Date Mardi 4 Juillet 2023
Heure 11:45
Institut LPENS
Salle Salle Dussane
Nom de l'orateur Eickbusch
Prenom de l'orateur Alec
Addresse email de l'orateur
Institution de l'orateur Yale University
Titre Recent advances in control and error correction of GKP codes
Résumé The past four years have seen rapid experimental progress in realizing the bosonic quantum error correction code proposed in 2001 by Gottesman, Kitaev, and Preskill (GKP), in which logical states are encoded as grid states of an oscillator [1]. Recent experimental milestones include the preparation and real-time error correction of the GKP code in trapped-ion and circuit quantum electrodynamics (cQED) architectures [2-6]. In this overview talk, I will give a top-level review of cQED experiments in our lab that have led to these advances, focusing on the quantum engineering for error correction of the GKP code [2] and how the same tools can be used for universal control of an oscillator with weak dispersive coupling to a qubit [5]. I will also discuss our recent results on optimizing the error correction protocol using model-free reinforcement learning, leading to the demonstration of a fully error-corrected quantum memory with coherence beyond break even [6]. Finally, if time allows, I will discuss the next steps, including our ongoing experimental work towards realizing single- and two-qubit gates on error-corrected GKP qubits and towards fault tolerant quantum error correction. [1] Gottesman, Kitaev, Preskill, PRA 2001; [2] Campagne-Ibarcq, Eickbusch, Touzard et al. Nature 2020 ; [3] Flühmann et al. Nature 2019 ; [4] de Neeve et al. Nature Physics 2022; [5] Eickbusch et al. Nature Physics 2022; [6] Sivak et al. Nature 2023.
Numéro de preprint arXiv
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