48 citations · 158 across the 12 of their papers we have counts for
14 papers
Superconducting edge contact to a buried Ge quantum well
Dina Sokolova, Davide Costa, Davide Degli Esposti +4
Semiconductor-superconductor hybrid systems form the basis for a broad range of quantum phenomena, such as Andreev bound states, topological superconductivity, and hybrid quantum H…
Probing Residual Noise at a Decoherence Sweet Spot in a Si/SiGe Spin Qubit
Shinwoo Lee, Hanseo Sohn, Jaemin Park +7
In Si/SiGe spin qubits with micromagnets, the longitudinal stray field gradient transduces charge noise into qubit frequency noise and limits coherence. We compare two neigh…
Feedback stabilization of multi-qubit Hamiltonian parameters enabled by single-shot measurement-based sequential Monte Carlo
Hyeongyu Jang, Jaemin Park, Younguk Song +6
Fast measurement, signal processing, and accurate estimation of Hamiltonian parameters are essential for feedback control in quantum-classical interface circuitry. However, existin…
Confinement drives valley splitting above 4K in buried silicon quantum wells
Davide Degli Esposti, Emma Catherine Brann, Asser Elsayed +3
Controlling the energy scales of a quantum system is essential for defining robust qubits. In silicon spin qubits, the nearly degenerate conduction-band valleys create a leakage ch…
Mapping g-factors and complex intervalley coupling in Si/SiGe by conveyor-mode shuttling
Mats Volmer, Tom Struck, Arnau Sala +7
As silicon spin qubit chips are increasing in qubit number and area, methods for the screening of qubit related material parameters become vital. Here we demonstrate the two-dimens…
Weight-four parity checks with silicon spin qubits
Brennan Undseth, Nicola Meggiato, Yi-Hsien Wu +7
Recent advances in coherent spin shuttling have made sparse semiconductor spin qubit arrays an appealing solid-state platform to realize quantum processors. The dynamic and long-ra…
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…
Application of zero-noise extrapolation-based quantum error mitigation to a silicon spin qubit
Hanseo Sohn, Jaewon Jung, Jaemin Park +5
As quantum computing advances towards practical applications, reducing errors remains a crucial frontier for developing near-term devices. Errors in the quantum gates and quantum s…
Passive and active suppression of transduced noise in silicon spin qubits
Jaemin Park, Hyeongyu Jang, Hanseo Sohn +7
Addressing and mitigating decoherence sources plays an essential role in the development of a scalable quantum computing system, which requires low gate errors to be consistently m…
Low disorder and high valley splitting in silicon
Davide Degli Esposti, Lucas E. A. Stehouwer, Önder Gül +13
The electrical characterisation of classical and quantum devices is a critical step in the development cycle of heterogeneous material stacks for semiconductor spin qubits. In the…
Germanium wafers for strained quantum wells with low disorder
Lucas E. A. Stehouwer, Alberto Tosato, Davide Degli Esposti +4
We grow strained Ge/SiGe heterostructures by reduced-pressure chemical vapor deposition on 100 mm Ge wafers. The use of Ge wafers as substrates for epitaxy enables high-quality Ge-…
Hotter is easier: unexpected temperature dependence of spin qubit frequencies
Brennan Undseth, Oriol Pietx-Casas, Eline Raymenants +13
As spin-based quantum processors grow in size and complexity, maintaining high fidelities and minimizing crosstalk will be essential for the successful implementation of quantum al…
Wafer-scale low-disorder 2DEG in Si/SiGe without an epitaxial Si cap
Davide Degli Esposti, Brian Paquelet Wuetz, Viviana Fezzi +3
We grow Si/SiGe heterostructures by reduced-pressure chemical vapor deposition and terminate the stack without an epitaxial Si cap but with an amorphous Si-rich layer obtain…