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DTSTART;TZID=Europe/Paris:20261117T140000
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DTSTAMP:20261104T213518Z
CREATED:20261104T213518Z
LAST-MODIFIED:20261104T213518Z
UID:10000350-1794924000-1794927600@sfp-alpes.fr
SUMMARY:Florent LECOCQ (NIST (Boulder))
DESCRIPTION:Qubit measurements using nonreciprocal amplifiers\nRésumé : \nHigh-fidelity QND qubit measurements are a cornerstone of quantum error correction schemes. In state-of-the-art superconducting quantum processors\, this is achieved by combining dispersive readout with low-noise microwave measurement chains based on parametric amplifiers. However\, to protect the qubits from unwanted backaction\, typical systems require multiple stages of bulky magnetic circulators\, a major roadblock toward scaling this approach to thousands or millions of qubits. Here I will discuss various efforts toward building amplifiers which embed directionality\, and their applications to qubit measurements. In particular\, I will focus on the experimental demonstration of high-fidelity\, multiplexed\, QND qubit measurements with a circulator-free readout chain\, achieving all the requirements for scalability. \n_ \nContact : equipe-seminaires-nano@listes.grenoble.cnrs.fr
URL:https://sfp-alpes.fr/event/florent-lecocq-nist-boulder/
LOCATION:CNRS – Salle Rémy Lemaire (K223)\, CNRS - Institut Néel 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
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