Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session F48: Novel Superconducting Qubit Readout
8:00 AM–11:00 AM,
Tuesday, March 5, 2024
Room: 200E
Sponsoring
Unit:
DQI
Chair: Raymond Simmonds, National Institute of Standards and Technology, Boulder
Abstract: F48.00003 : Investigating the quantum non-demolition character of the longitudinal transmon readout*
8:48 AM–9:00 AM
Presenter:
Alex A Chapple
(Universite de Sherbrooke)
Authors:
Alex A Chapple
(Universite de Sherbrooke)
Alexander McDonald
(Universite de Sherbrooke)
Christian de Correc
(Universite de Sherbrooke)
Manuel H Munoz Arias
(Institut Quantique, Université de Sherbrooke)
Alexandre Blais
(Universite de Sherbrooke)
Here we extend the work from [3] by utilizing recently developed theoretical and numerical tools for studying transmon ionization to study whether fast readout of longitudinally coupled transmon-resonator system leads to significant leakage. Using a realistic circuit that realizes longitudinal coupling introduced in Ref. [3], we explore how the multi-level nature of a transmon affects this readout, the impact of chaos in the system, and whether longitudinal readout leads to transmon ionization [2]. We show that we are in principle able to achieve fast, high-fidelity QND readout of transmon qubits with longitudinal coupling.
[1] T Walter, et al., Phys. Rev. Appl. 7, 054020 (2017).
[2] Ross Shillito, et al., Phys. Rev. Applied 18, 034031(2022)
[3] Nicolas Didier, et al., Phys. Rev. Lett. 115, 203601 (2015)
*This work was undertaken thanks in part to funding from NSERC, the Canada First Research Excellence Fund, the Ministère de l'Économie et de l'Innovation du Québec, Fonds de recherche du Québec, and the U.S. Army Research Office Grant No. W911NF-22-S-0006.
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