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Laroche, D. (author), Bouman, D. (author), van Woerkom, D.J. (author), Proutski, A. (author), Murthy, Chaitanya (author), Nayak, Chetan (author), Kouwenhoven, Leo P. (author), Geresdi, A. (author), More Authors (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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Kroll, J.G. (author), Borsoi, F. (author), Uilhoorn, W. (author), de Jong, D. (author), Quintero Perez, M. (author), van Woerkom, D.J. (author), Bruno, A. (author), Plissard, S. R. (author), Car, D (author), Bakkers, E.P.A.M. (author), Cassidy, M.C. (author), Kouwenhoven, Leo P. (author)
Superconducting coplanar-waveguide resonators that can operate in strong magnetic fields are important tools for a variety of high-frequency superconducting devices. Magnetic fields degrade resonator performance by creating Abrikosov vortices that cause resistive losses and frequency fluctuations or suppress the superconductivity entirely. To...
journal article 2019
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Zuo, K. (author), Mourik, V. (author), Szombati, D.B. (author), Nijholt, B. (author), van Woerkom, D.J. (author), Geresdi, A. (author), Chen, Jun (author), Ostroukh, Viacheslav P. (author), Akhmerov, A.R. (author), Plissard, S.R. (author), Car, D. (author), Bakkers, E.P.A.M. (author), Pikulin, Dmitry I. (author), Kouwenhoven, Leo P. (author), Frolov, S.M. (author)
Junctions created by coupling two superconductors via a semiconductor nanowire in the presence of high magnetic fields are the basis for the potential detection, fusion, and braiding of Majorana bound states. We study NbTiN/InSb nanowire/NbTiN Josephson junctions and find that the dependence of the critical current on the magnetic field...
journal article 2017
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van Woerkom, D.J. (author), Proutski, A. (author), van Gulik, R.J.J. (author), Kriváchy, Tamás (author), Car, D. (author), Plissard, S.R. (author), Bakkers, E.P.A.M. (author), Kouwenhoven, L.P. (author), Geresdi, A. (author)
We measured the Josephson radiation emitted by an InSb semiconductor nanowire junction utilizing photon-assisted quasiparticle tunneling in an ac-coupled superconducting tunnel junction. We quantify the action of the local microwave environment by evaluating the frequency dependence of the inelastic Cooper-pair tunneling of the nanowire...
journal article 2017
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Zhang, H. (author), Gül, Ö (author), Conesa Boj, S.C. (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, L.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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van Woerkom, D.J. (author)
Due to the collective behavior of electrons, exotic states can appear in condensed matter systems. In this PhD thesis, we investigate semiconducting nanowire Josephson junctions that potentially have Majorana zero modes (MZM) as exotic states. MZM are expected to form a robust quantum bit and quantum operations are done by interchange, otherwise...
doctoral thesis 2017
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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, L.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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Gül, Ö (author), Zhang, H. (author), de Vries, F.K. (author), van Veen, J. (author), Zuo, K. (author), Mourik, V. (author), Conesa Boj, S.C. (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, L.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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van Woerkom, P.T.L.M. (author)
In het jaar 1816 formuleerde de Franse wiskundige J.D. Gergonne het volgende probleem: beschouw een familie van oppervlakken welke aan boven- en onderzijde zijn opgespannen door twee diagonalen van een kubus, en waarvan de zijranden op zijvlakken van die kubus liggen. Welke vorm heeft de minimale oppervlakte? Dit probleem werd in 1865 door H.A....
book chapter 2017
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Meijers, P. (author), van Woerkom, P.T.L.M. (author)
Met de overgang van de Polytechnische School naar de Technische Hoogeschool in 1905 werd ook binnen de destijdse Afdeling der Werktuigbouwkunde en Scheepsbouwkunde de behoefte en de noodzaak gevoeld om haar onderwijs en onderzoek naar een hoger wetenschappelijk niveau te tillen. Nieuwe hoogleraren werden benoemd, een enkeling zelfs nog...
book chapter 2017
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van Woerkom, P.T.L.M. (author)
Course Notes for Course Dynamica 2, Faculty 3mE / Mechanical Engineering, TU Delft, period 1998-2015.
report 2003
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Chu, Q.P. (author), Zwartbol, T. (author), van Woerkom, P.T.L.M. (author)
The objective of the present paper is to give an overview of spacecraft attitude determination with GPS. GPS receivers with single or multiple antennas nowadays are low-cost sensors that constitute a valuable complement to existing sensor suites. GPS has been widely used for positioning and vehicle navigation. However, using GPS as an attitude...
report 1995
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Pronk, Z. (author), van Woerkom, P.T.L.M. (author)
Computer simulation and testing of zero-gravity operations in support of development of space structures becomes more and more standard. Yet, the need for hardware simulation and test facilities representing zero-gravity conditions remains necessary, because of the strong requirements for verification and validation of system responses and model...
report 1995
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Misra, A.K. (author), van Woerkom, P.T.L.M. (author)
Large robotic manipulators are to play a key role in assembly, maintenance, and servicing of future complex inorbit infrastructures. The first generation space manipulator is the Canadian Remote Manipulator System (RMS), in orbit since 1981. A second generation of large space manipulators is presently under development, for use on the...
report 1995
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Pronk, Z. (author), van Woerkom, P.T.L.M. (author)
Considering the development of various structures required in current and future space projects like the International Space Station, and lunar and planetary explorations, the development support of systems performing relative motion (rendezvous & docking), manipulations (robotics), assembly operations and inspections, becomes more and more...
report 1995
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de Boer, A. (author), van Woerkom, P.Th.L.M. (author)
report 1994
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van Woerkom, P.T.L.M. (author), de Boer, A. (author), Ellenbroek, M.H.M. (author), Wijker, J.J. (author)
A brief description is given of the European Robot Arm (ERA), and its intended application to assembly, maintenance, and servicing of the Russian segment of the International Space Station Alpha. The need for manipulator simulation is recalled, and ERA simulator development is outlined. System characteristics that must be modelled for...
report 1994
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van Woerkom, P.T.L.M. (author), Guelman, M. (author), Ehrenwald, L. (author)
The paper focuses on Indirect adaptive control of space robot manipulators when maneuvering payloads with Imperfectly known mechanical parameters. The objective Is to estimate system mechanical parameters during the maneuver Itself. The system bodies are rigid, and are concatenated by ideal, rotational Joints. Existing adaptive control laws are...
report 1993
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de Boer, A. (author), van Woerkom, P.T.L.M. (author)
report 1993
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van Woerkom, P.Th.L.M. (author)
Earlier work on the formulation of an efficient algorithm for the description of the dynamics of a generic, structurally flexible space manipulator, has resulted in a linear recursive, "Order-N" algorithm. It forms the basis for the multi-body simulation program REALDYN at NLR. Various theoretical results obtained since then, have been collected...
report 1992
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