Searched for: author%3A%22Splitthoff%2C+L.J.%22
(1 - 10 of 10)
document
Splitthoff, L.J. (author)
Superconducting circuits in cryogenic environments form an excellent material platform for the realization and study of quantum systems. <br/>In this thesis, we continue the exploration of novel types of circuit elements which expand the circuit quantum electrodynamics toolbox to enable exotic, and potentially better circuit implementations. To...
doctoral thesis 2024
document
Wesdorp, J.J. (author), Vaartjes, A. (author), Grünhaupt, L. (author), Roelofs, S.R. (author), Splitthoff, L.J. (author), Pita-Vidal, Marta (author), Bargerbos, A. (author), Kouwenhoven, Leo P. (author), Andersen, C.K. (author)
Andreev bound states are fermionic states localized in weak links between superconductors which can be occupied with spinful quasiparticles. Microwave experiments using superconducting circuits with InAs/Al nanowire Josephson junctions have recently enabled probing and coherent manipulation of Andreev states but have remained limited to zero...
journal article 2024
document
Splitthoff, L.J. (author), Wesdorp, J.J. (author), Pita-Vidal, Marta (author), Bargerbos, A. (author), Liu, Yu (author), Andersen, C.K. (author)
Superconducting parametric amplifiers play a crucial role in the preparation and readout of quantum states at microwave frequencies, enabling high-fidelity measurements of superconducting qubits. Most existing implementations of these amplifiers rely on the nonlinearity from Josephson junctions, superconducting quantum interference devices,...
journal article 2024
document
Pita-Vidal, Marta (author), Wesdorp, J.J. (author), Splitthoff, L.J. (author), Bargerbos, A. (author), Liu, Yu (author), Kouwenhoven, Leo P. (author), Andersen, C.K. (author)
Andreev spin qubits have recently emerged as an alternative qubit platform with realizations in semiconductor–superconductor hybrid nanowires. In these qubits, the spin degree of freedom of a quasiparticle trapped in a Josephson junction is intrinsically spin–orbit coupled to the supercurrent across the junction. This interaction has...
journal article 2024
document
Bargerbos, A. (author), Splitthoff, L.J. (author), Pita-Vidal, Marta (author), Wesdorp, J.J. (author), Liu, Yu (author), Krogstrup, Peter (author), Kouwenhoven, Leo P. (author), Andersen, C.K. (author), Grünhaupt, L. (author)
Quantum error correction will be an essential ingredient in realizing fault-tolerant quantum computing. However, most correction schemes rely on the assumption that errors are sufficiently uncorrelated in space and time. In superconducting qubits, this assumption is drastically violated in the presence of ionizing radiation, which creates bursts...
journal article 2023
document
Wesdorp, J.J. (author), Grünhaupt, L. (author), Vaartjes, A. (author), Pita-Vidal, Marta (author), Bargerbos, A. (author), Splitthoff, L.J. (author), Krogstrup, P. (author), van Heck, B. (author), de Lange, G. (author)
Josephson junctions in InAs nanowires proximitized with an Al shell can host gate-tunable Andreev bound states. Depending on the bound state occupation, the fermion parity of the junction can be even or odd. Coherent control of Andreev bound states has recently been achieved within each parity sector, but it is impeded by incoherent parity...
journal article 2023
document
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
document
Pita-Vidal, Marta (author), Bargerbos, A. (author), Splitthoff, L.J. (author), Grünhaupt, L. (author), Wesdorp, J.J. (author), Liu, Yu (author), Kouwenhoven, Leo P. (author), van Heck, Bernard (author), Andersen, C.K. (author)
Spin qubits in semiconductors are a promising platform for producing highly scalable quantum computing devices. However, it is difficult to realize multiqubit interactions over extended distances. Superconducting spin qubits provide an alternative by encoding a qubit in the spin degree of freedom of an Andreev level. These Andreev spin qubits...
journal article 2023
document
Bargerbos, A. (author), Pita-Vidal, Marta (author), Splitthoff, L.J. (author), Grünhaupt, L. (author), Wesdorp, J.J. (author), Andersen, C.K. (author), Liu, Yu (author), Kouwenhoven, Leo P. (author), van Heck, B. (author)
We realize a hybrid superconductor-semiconductor transmon device in which the Josephson effect is controlled by a gate-defined quantum dot in an InAs-Al nanowire. Microwave spectroscopy of the transition spectrum of the transmon allows us to probe the ground-state parity of the quantum dot as a function of the gate voltages, the external...
journal article 2022
document
Splitthoff, L.J. (author), Bargerbos, A. (author), Grünhaupt, L. (author), Pita-Vidal, Marta (author), Wesdorp, J.J. (author), Liu, Yu (author), Kou, Angela (author), Andersen, C.K. (author), van Heck, B. (author)
We report the detection of a gate-tunable kinetic inductance in a hybrid InAs/Al nanowire. For this purpose, we embed the nanowire into a quarter-wave coplanar waveguide resonator and measure the resonance frequency of the circuit. We find that the resonance frequency can be changed via the gate voltage that controls the electron density of...
journal article 2022
Searched for: author%3A%22Splitthoff%2C+L.J.%22
(1 - 10 of 10)