6 papers
Conductance Plateaus at Quantum Hall Integer Filling Factors in Germanium Quantum Point Contacts
Karina Hudson, Davide Costa, Davide Degli Esposti +2
Constricting transport through a one-dimensional quantum point contact in the quantum Hall regime enables gate-tunable selection of the edge modes propagating between voltage probe…
Using Landau quantization to probe disorder in semiconductor heterostructures
Asser Elsayed, Davide Costa, Lucas E. A. Stehouwer +5
Understanding scattering mechanisms in semiconductor heterostructures is crucial to reducing sources of disorder and ensuring high yield and uniformity in large spin qubit arrays.…
Quantum oscillations in two-dimensional hole gases with competing cyclotron and Zeeman energy
Davide Costa, Lucas E. A. Stehouwer, Davide Degli Esposti +1
Evaluation of critical bandstructure and quantum transport parameters in two-dimensional systems is challenging when competition emerges among different energy scales shaping quant…
QARPET: A Crossbar Chip for Benchmarking Semiconductor Spin Qubits
Alberto Tosato, Asser Elsayed, Federico Poggiali +5
Large-scale integration of semiconductor spin qubits into quantum processors hinges on the ability to characterize quantum components at scale, a task challenged by their operation…
Reducing disorder in Ge quantum wells by using thick SiGe barriers
Davide Costa, Lucas E. A. Stehouwer, Yi Huang +4
We investigate the disorder properties of two-dimensional hole gases in Ge/SiGe heterostructures grown on Ge wafers, using thick SiGe barriers to mitigate the influence of the semi…
Exploiting epitaxial strained germanium for scaling low noise spin qubits at the micron-scale
Lucas E. A. Stehouwer, Cécile X. Yu, Barnaby van Straaten +10
Disorder in the heterogeneous material stack of semiconductor spin qubit systems introduces noise that compromises quantum information processing, posing a challenge to coherently…