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van Veen, J. (author)Quantum computers can solve some problems exponentially faster than classical computers. Unfortunately, the computational power of quantum computers is currently limited by the number of working qubits. It is difficult to scale up these systems, because qubits are easily affected by noise in their environment. This noise leads to decoherence:...doctoral thesis 2019
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van Veen, J. (author), de Jong, D. (author), Han, L. (author), Prosko, C.G. (author), Krogstrup, P. (author), Watson, J.D. (author), Kouwenhoven, Leo P. (author), Pfaff, W. (author)We report direct detection of charge tunneling between a quantum dot and a superconducting island through radio-frequency gate sensing. We are able to resolve spin-dependent quasiparticle tunneling as well as two-particle tunneling involving Cooper pairs. The quantum dot can act as an RF-only sensor to characterize the superconductor addition...journal article 2019
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de Jong, D. (author), van Veen, J. (author), Binci, L. (author), Singh, A. (author), Krogstrup, P. (author), Kouwenhoven, Leo P. (author), Pfaff, W. (author), Watson, J.D. (author)Dispersive sensing is a powerful technique that enables scalable and high-fidelity readout of solid-state quantum bits. In particular, gate-based dispersive sensing has been proposed as the readout mechanism for future topological qubits, which can be measured by single electrons tunneling through zero-energy modes. The development of such a...journal article 2019
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de Vries, F.K. (author), Timmerman, Tom (author), Ostroukh, Viacheslav P. (author), van Veen, J. (author), Beukman, A.J.A. (author), Qu, F. (author), Wimmer, M.T. (author), Kiselev, Andrey A. (author), Kouwenhoven, Leo P. (author)Josephson junctions defined in strong spin orbit semiconductors are highly interesting for the search for topological systems. However, next to topological edge states that emerge in a sufficient magnetic field, trivial edge states can also occur. We study the trivial edge states with superconducting quantum interference measurements on...journal article 2018
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van Veen, J. (author), Proutski, A. (author), Karzig, Torsten (author), Pikulin, D. (author), Lutchyn, Roman M. (author), Nygård, Jesper (author), Krogstrup, P. (author), Geresdi, A. (author), Kouwenhoven, Leo P. (author), Watson, J.D. (author)Parity control of superconducting islands hosting Majorana zero modes (MZMs) is required to operate topological qubits made from proximitized semiconductor nanowires. We test this control by studying parity effects in hybrid InAs-Al single-Cooper-pair transistors (SCPTs) to evaluate the feasibility of this material system. In particular, we...journal article 2018
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Gül, Önder (author), Zhang, H. (author), de Vries, F.K. (author), van Veen, J. (author), Zuo, K. (author), Mourik, V. (author), Conesa Boj, S. (author), Nowak, M.P. (author), van Woerkom, D.J. (author), Quintero Perez, M. (author), Cassidy, M.C. (author), Geresdi, A. (author), Koelling, Sebastian (author), Car, D. (author), Plissard, S.R. (author), Bakkers, E.P.A.M. (author), Kouwenhoven, Leo P. (author)Topological superconductivity is a state of matter that can host Majorana modes, the building blocks of a topological quantum computer. Many experimental platforms predicted to show such a topological state rely on proximity-induced superconductivity. However, accessing the topological properties requires an induced hard superconducting gap,...journal article 2017
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Zhang, H. (author), Gül, Önder (author), Conesa Boj, S. (author), Nowak, M.P. (author), Wimmer, M.T. (author), Zuo, K. (author), Mourik, Vincent (author), de Vries, F.K. (author), van Veen, J. (author), de Moor, M.W.A. (author), Bommer, J.D.S. (author), van Woerkom, D.J. (author), Car, Diana (author), Plissard, S.R. (author), Bakkers, E.P.A.M. (author), Quintero Perez, M. (author), Cassidy, M.C. (author), Koelling, Sebastian (author), Goswami, S. (author), Watanabe, Kenji (author), Taniguchi, Takashi (author), Kouwenhoven, Leo P. (author)Semiconductor nanowires have opened new research avenues in quantum transport owing to their confined geometry and electrostatic tunability. They have offered an exceptional testbed for superconductivity, leading to the realization of hybrid systems combining the macroscopic quantum properties of superconductors with the possibility to...journal article 2017
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Beukman, A.J.A. (author), de Vries, F.K. (author), van Veen, J. (author), Skolasinski, R.J. (author), Wimmer, M.T. (author), Qu, F. (author), De Vries, David T. (author), Nguyen, Binh Minh (author), Kouwenhoven, Leo P. (author)The spin-orbit interaction is investigated in a dual gated InAs/GaSb quantum well. Using an electric field, the quantum well can be tuned between a single-carrier regime with exclusively electrons as carriers and a two-carrier regime where electrons and holes coexist. The spin-orbit interaction in both regimes manifests itself as a beating in...journal article 2017
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Nguyen, Binh Minh (author), Kiselev, Andrey A. (author), Noah, Ramsey (author), Yi, Wei (author), Qu, F. (author), Beukman, A.J.A. (author), de Vries, F.K. (author), van Veen, J. (author), Nadj-Perge, S. (author), Kouwenhoven, Leo P. (author), Kjaergaard, Morten (author), Suominen, Henri J. (author), Nichele, Fabrizio (author), Marcus, Charles M. (author), Manfra, Michael J. (author), Sokolich, Marko (author)A Corbino ring geometry is utilized to analyze edge and bulk conductance of InAs/GaSb quantum well structures. We show that edge conductance exists in the trivial regime of this theoretically predicted topological system with a temperature-insensitive linear resistivity per unit length in the range of 2 kΩ/μm. A resistor network model of the...journal article 2016
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Nichele, Fabrizio (author), Suominen, Henri J. (author), Kjaergaard, Morten (author), Marcus, Charles M. (author), Sajadi, Ebrahim (author), Folk, Joshua A. (author), Qu, F. (author), Beukman, A.J.A. (author), de Vries, F.K. (author), van Veen, J. (author), Nadj-Perge, S. (author), Kouwenhoven, Leo P. (author)We present transport and scanning SQUID measurements on InAs/GaSb double quantum wells, a system predicted to be a two-dimensional topological insulator. Top and back gates allow independent control of density and band offset, allowing tuning from the trivial to the topological regime. In the trivial regime, bulk conductivity is quenched but...journal article 2016
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Van Veen, J. (author)This paper should be considered as Van Veen's most important publication since his thesis. It summarizes the results of 20 years of intensive study of estuarine and tidal- basin morphodynamics in The Netherlands. The paper is testimony to Van Veen' s keen observational and artistic skills. His approach is nearly "Da Vincian" in the sense that he...journal article 2001
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Van Veen, J. (author)Historical overview of hydraulic engineering in the Netherlands until 1960. The author wrote the main part of this book during the second world war. The author (1893-1959) advocated at that time strong improvement of the Dutch sea defences, but this was politically not accepted. For that he used the pseudonym "Dr. Cassandra". After 1953 he...report 1962
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van Veen, J. (author)Description of coastal engineering, with focus on lowland, deltaic coasts (the Netherlands), description of estuaries, coastal protection works.report 1961
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Maris, A.G. (author), Van Veen, J. (author), De Vries, J.W. (author), Dibbits, H.A.M.C. (author)Bundel met artikelen over de waterloopkundige en waterbouwkundige achtergronden van het Deltaplan. Het artikel van Van Veen gaat in op de wordingsgeschiedenis van het Deltaplan, de plannen van voor 1953 en de analoge wiskundige modellen (deltar). De Vries gaat in op de planvorming en de besluitvorming van de Deltacommissie t.a.v. de...report 1956
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van Veen, J. (author)A short survey of the nine floods which have ravaged the Netherlands since 1877 is here presented. The flooded areas are given on the maps; the figures in the tables give the inundated surface in ha per province. From these data it can be seen of what great importance the closing of the Zuiderzee and of the inlets between the Westerschelde and...report 1956
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Van Veen, J. (author), Mesu, F.P. (author)Overzicht van de Nederlandse waterhuishouding door Van Veen, onderzoek met modellen, belang voor transport. In de bijdrage van Mesu wordt ingegaan om de landbouwkundige aspekten van de de waterhuishouding in Nederland.report 1956
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van Veen, J. (author)Derde interim-advies van de Deltacommissie aan de minister van Verkeer en Waterstaat. In dit rapport wordt geadviseerd met spoed de dammen tussen Noord-Beveland, Zuid-Beveland en Walcheren aan te leggen, mede als “oefening” voor de noodzakelijke afdamming van Brouwershavense Gat en Oosterschelde. Aangegeven wordt dat de plannen voor een Drie...report 1955
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Van Veen, J. (author)Description of land subsidence in the Netherlands in the period from about 1650-1950, based on observations from gauges.report 1954
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van Veen, J. (author)Notitie waarin ingegeven wordt dat een al te grote extapolatie tot grote onzekerheden leidt in de bepaling van de waterstand.report 1954
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van Veen, J. (author)Derde interim-advies van de Deltacommissie aan de minister van Verkeer en Waterstaat. In dit rapport wordt geadviseerd de delta vrijwel volledig af te sluiten met een viertal afsluitdammen en bijkomende werken. Het advies bevat de motivering waarom gekozen is voor afsluiting en niet voor integrale dijkverhoging. Aangegeven wordt wat de...report 1954