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Bargerbos, A. (author), Pita-Vidal, Marta (author), Žitko, Rok (author), Splitthoff, L.J. (author), Grünhaupt, L. (author), Wesdorp, J.J. (author), Liu, Yu (author), Kouwenhoven, Leo P. (author), Aguado, Ramón (author), Andersen, C.K. (author), Kou, Angela (author), van Heck, Bernard (author)We use a hybrid superconductor-semiconductor transmon device to perform spectroscopy of a quantum dot Josephson junction tuned to be in a spin-1/2 ground state with an unpaired quasiparticle. Because of spin-orbit coupling, we resolve two flux-sensitive branches in the transmon spectrum, depending on the spin of the quasiparticle. A finite...journal article 2023
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Bargerbos, A. (author), Uilhoorn, W. (author), Yang, C. (author), Krogstrup, Peter (author), Kouwenhoven, Leo P. (author), de Lange, G. (author), van Heck, B. (author), Kou, A. (author)Isolation from the environment determines the extent to which charge is confined on an island, which manifests as Coulomb oscillations, such as charge dispersion. We investigate the charge dispersion of a nanowire transmon hosting a quantum dot in the junction. We observe rapid suppression of the charge dispersion with increasing junction...journal article 2020
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Pita-Vidal, Marta (author), Bargerbos, A. (author), Yang, C. (author), van Woerkom, D.J. (author), Pfaff, W. (author), Haider, S.N. (author), Krogstrup, Peter (author), Kouwenhoven, Leo P. (author), de Lange, G. (author), Kou, A. (author)Hybrid superconducting circuits, which integrate nonsuperconducting elements into a circuit quantum electrodynamics (cQED) architecture, expand the possible applications of cQED. Building hybrid circuits that work in large magnetic fields presents even further possibilities, such as the probing of spin-polarized Andreev bound states and the...journal article 2020