129 citations · 432 across the 15 of their papers we have counts for
15 papers
Flip-chip integrated superconducting qubits using electroplated bump bonds
Yen-An Shih, Rebecca Gharibaan, Barka Khan +9
Flip-chip integration offers a promising route toward scalable superconducting quantum processors and hybrid semiconductor-superconductor quantum devices. We develop a three-dimens…
Coherence limitations of a Fourier-engineered transmon qubit
Nataliia K. Zhurbina, Siddharth Singh, Lukas J. Splitthoff +4
Intrinsically protected superconducting qubits are a promising route toward enhancing coherence times and advancing hardware towards applications in quantum computing. The $\cos(2φ…
Automated, physics-guided, multi-parameter design optimization for superconducting quantum devices
Axel M. Eriksson, Lukas J. Splitthoff, Harsh Vardhan Upadhyay +5
The design of nonlinear superconducting quantum circuits often relies on time-consuming iterative electromagnetic simulations requiring manual intervention. These interventions ent…
Topological finite size effect in one-dimensional chiral symmetric systems
Guliuxin Jin, D. O. Oriekhov, Lukas Johannes Splitthoff +1
Topological phases of matter have been widely studied for their robustness against impurities and disorder. The broad applicability of topological materials relies on the reliable…
Improved fluxonium readout through dynamic flux pulsing
Taryn V. Stefanski, Figen Yilmaz, Eugene Y. Huang +5
The ability to perform rapid, high fidelity readout of a qubit state is an important requirement for quantum algorithms and, in particular, for enabling operations such as mid-circ…
Gate-tunable phase transition in a bosonic Su-Schrieffer-Heeger chain
Lukas Johannes Splitthoff, Miguel Carrera Belo, Guliuxin Jin +3
Metamaterials engineered to host topological states of matter in controllable quantum systems hold promise for the advancement of quantum simulations and quantum computing technolo…
Gate-tunable kinetic inductance parametric amplifier
Lukas Johannes Splitthoff, Jaap Joachim Wesdorp, Marta Pita-Vidal +2
Superconducting parametric amplifiers play a crucial role in the preparation and readout of quantum states at microwave frequencies, enabling high-fidelity measurements of supercon…
Strong tunable coupling between two distant superconducting spin qubits
Marta Pita-Vidal, Jaap J. Wesdorp, Lukas J. Splitthoff +4
Superconducting (or Andreev) spin qubits have recently emerged as an alternative qubit platform with realizations in semiconductor-superconductor hybrid nanowires. In these qubits,…
Spectroscopy of spin-split Andreev levels in a quantum dot with superconducting leads
Arno Bargerbos, Marta Pita-Vidal, Rok Žitko +9
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 qua…
Direct manipulation of a superconducting spin qubit strongly coupled to a transmon qubit
Marta Pita-Vidal, Arno Bargerbos, Rok Žitko +9
Spin qubits in semiconductors are currently one of the most promising architectures for quantum computing. However, they face challenges in realizing multi-qubit interactions over…
Microwave spectroscopy of interacting Andreev spins
J. J. Wesdorp, F. J. Matute-Caňadas, A. Vaartjes +13
Andreev bound states are fermionic states localized in weak links between superconductors which can be occupied with spinful quasiparticles. Microwave experiments using superconduc…
Mitigation of quasiparticle loss in superconducting qubits by phonon scattering
Arno Bargerbos, Lukas Johannes Splitthoff, Marta Pita-Vidal +6
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 suff…
Singlet-doublet transitions of a quantum dot Josephson junction detected in a transmon circuit
Arno Bargerbos, Marta Pita-Vidal, Rok Žitko +10
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 spectro…
Gate-tunable kinetic inductance in proximitized nanowires
Lukas Johannes Splitthoff, Arno Bargerbos, Lukas Grünhaupt +6
We report the detection of a gate-tunable kinetic inductance in a hybrid InAs/Al nanowire. For this purpose, we have embedded the nanowire into a quarter-wave coplanar waveguide re…
Dynamical polarization of the fermion parity in a nanowire Josephson junction
J. J. Wesdorp, L. Grünhaupt, A. Vaartjes +6
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 j…