Searched for: author%3A%22Geresdi%2C+A.%22
(1 - 17 of 17)
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Gül, Önder (author), Zhang, H. (author), Bommer, J.D.S. (author), de Moor, M.W.A. (author), Car, Diana (author), Plissard, Sébastien R. (author), Bakkers, E.P.A.M. (author), Geresdi, A. (author), Kouwenhoven, Leo P. (author)
Correction to: Nature Nanotechnologyhttps://doi.org/10.1038/s41565-017-0032-8, published online 15 January 2018. The Letter reports Majorana signatures in hybrid InSb semiconductor nanowire–NbTiN superconductor devices. The devices exhibit a conductance plateau near the conductance quantum 2e<sup>2</sup>/h at bias voltages above the...
journal article 2024
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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
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Yurttagul, N.F. (author), Sarsby, M. (author), Geresdi, A. (author)
The charge localization of single electrons on mesoscopic metallic islands leads to a suppression of the electrical current, known as the Coulomb blockade. When this correction is small, it enables primary electron thermometry, as it was first demonstrated by Pekola et al. (Phys Rev Lett 73:2903, 1994). However, in the low temperature limit,...
journal article 2021
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Laucht, Arne (author), Hohls, Frank (author), Ubbelohde, Niels (author), Gonzalez-Zalba, M. Fernando (author), Scarlino, Pasquale (author), Koski, J.V. (author), Yang, Chih Hwan (author), Geresdi, A. (author), Mol, Jan A. (author)
Quantum phenomena are typically observable at length and time scales smaller than those of our everyday experience, often involving individual particles or excitations. The past few decades have seen a revolution in the ability to structure matter at the nanoscale, and experiments at the single particle level have become commonplace. This has...
review 2021
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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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Sarsby, M. (author), Yurttagul, N.F. (author), Geresdi, A. (author)
Fragile quantum effects such as single electron charging in quantum dots or macroscopic coherent tunneling in superconducting junctions are the basis of modern quantum technologies. These phenomena can only be observed in devices where the characteristic spacing between energy levels exceeds the thermal energy, kBT, demanding effective...
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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Proutski, A. (author), Laroche, D. (author), Van 'T Hooft, Bas (author), Krogstrup, Peter (author), Nygård, Jesper (author), Kouwenhoven, Leo P. (author), Geresdi, A. (author)
The Cooper-pair transistor (CPT), a small superconducting island enclosed between two Josephson weak links, is the atomic building block of various superconducting quantum circuits. Utilizing gate-tunable semiconductor channels as weak links, the energy scale associated with the Josephson tunneling can be changed with respect to the charging...
journal article 2019
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Yurttagul, N.F. (author), Sarsby, M. (author), Geresdi, A. (author)
The frontiers of quantum electronics have been linked to the discovery of new refrigeration methods since the discovery of superconductivity at a temperature of around 4 K, enabled by the liquefaction of helium. Since then, advances in cryogenics have led to discoveries such as the quantum Hall effect and new technologies such as...
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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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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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
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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, Leo 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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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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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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De Lange, G. (author), Van Heck, B. (author), Bruno, A. (author), Van Woerkom, D.J. (author), Geresdi, A. (author), Plissard, S.R. (author), Bakkers, E.P.A.M. (author), Akhmerov, A.R. (author), Di Carlo, L. (author)
We report the realization of quantum microwave circuits using hybrid superconductor-semiconductor Josephson elements comprised of InAs nanowires contacted by NbTiN. Capacitively shunted single elements behave as transmon circuits with electrically tunable transition frequencies. Two-element circuits also exhibit transmonlike behavior near zero...
journal article 2015
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