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Fatemi, V. (author), Kurilovich, P. D. (author), Hays, M. (author), Bouman, D. (author), Connolly, T. (author), Diamond, S. (author), Krogstrup, P. (author), Geresdi, A. (author), Devoret, M. H. (author)
Electrostatic charging affects the many-body spectrum of Andreev states, yet its influence on their microwave properties has not been elucidated. We developed a circuit quantum electrodynamics probe that, in addition to transition spectroscopy, measures the microwave susceptibility of different states of a semiconductor nanowire weak link...
journal article 2022
document
Bouman, D. (author), van Gulik, R.J.J. (author), Steffensen, Gorm (author), Pataki, Dávid (author), Boross, Péter (author), Krogstrup, Peter (author), Nygård, Jesper (author), Paaske, Jens (author), Pályi, András (author), Geresdi, A. (author)
Serial double quantum dots created in semiconductor nanostructures provide a versatile platform for investigating two-electron spin quantum states, which can be tuned by electrostatic gating and an external magnetic field. In this Rapid Communication, we directly measure the supercurrent reversal between adjacent charge states of an InAs...
journal article 2020
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Laroche, D. (author), Bouman, D. (author), van Woerkom, D.J. (author), Proutski, A. (author), Murthy, Chaitanya (author), Nayak, Chetan (author), van Gulik, R.J.J. (author), Kouwenhoven, Leo P. (author), Geresdi, A. (author)
Quantum computation by non-Abelian Majorana zero modes (MZMs) offers an approach to achieve fault tolerance by encoding quantum information in the non-local charge parity states of semiconductor nanowire networks in the topological superconductor regime. Thus far, experimental studies of MZMs chiefly relied on single electron tunneling...
journal article 2019
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Hays, M. (author), de Lange, G. (author), Serniak, K. (author), van Woerkom, D.J. (author), Bouman, D. (author), Krogstrup, P. (author), Nygård, J. (author), Geresdi, A. (author), Devoret, M. H. (author)
The modern understanding of the Josephson effect in mesosopic devices derives from the physics of Andreev bound states, fermionic modes that are localized in a superconducting weak link. Recently, Josephson junctions constructed using semiconducting nanowires have led to the realization of superconducting qubits with gate-tunable Josephson...
journal article 2018
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Shen, J. (author), Heedt, S. (author), Borsoi, F. (author), van Heck, B. (author), Gazibegovic, S. (author), op het Veld, R.L.M. (author), Car, D. (author), Ramakers, S.J.J. (author), Wang, Guanzhong (author), Xu, D. (author), Bouman, D. (author), Geresdi, A. (author), Bakkers, E.P.A.M. (author), Kouwenhoven, Leo P. (author)
The number of electrons in small metallic or semiconducting islands is quantised. When tunnelling is enabled via opaque barriers this number can change by an integer. In superconductors the addition is in units of two electron charges (2e), reflecting that the Cooper pair condensate must have an even parity. This ground state (GS) is...
journal article 2018
document
van Woerkom, D.J. (author), Proutski, A. (author), Van Heck, Bernard (author), Bouman, D. (author), Väyrynen, Jukka I. (author), Glazman, Leonid I. (author), Krogstrup, P. (author), Nygård, Jesper (author), Kouwenhoven, Leo P. (author), Geresdi, A. (author)
The superconducting proximity effect in semiconductor nanowires has recently enabled the study of new superconducting architectures, such as gate-tunable superconducting qubits and multiterminal Josephson junctions. As opposed to their metallic counterparts, the electron density in semiconductor nanosystems is tunable by external...
journal article 2017
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