Semiconductor spin qubits

G Burkard, TD Ladd, A Pan, JM Nichol, JR Petta - Reviews of Modern Physics, 2023 - APS
The spin degree of freedom of an electron or a nucleus is one of the most basic properties of
nature and functions as an excellent qubit, as it provides a natural two-level system that is …

Review of performance metrics of spin qubits in gated semiconducting nanostructures

P Stano, D Loss - Nature Reviews Physics, 2022 - nature.com
Abstract This Technical Review collects values of selected performance characteristics of
semiconductor spin qubits defined in electrically controlled nanostructures. The …

The SpinBus architecture for scaling spin qubits with electron shuttling

M Künne, A Willmes, M Oberländer, C Gorjaew… - Nature …, 2024 - nature.com
Quantum processor architectures must enable scaling to large qubit numbers while
providing two-dimensional qubit connectivity and exquisite operation fidelities. For …

Atomic fluctuations lifting the energy degeneracy in Si/SiGe quantum dots

B Paquelet Wuetz, MP Losert, S Koelling… - Nature …, 2022 - nature.com
Abstract Electron spins in Si/SiGe quantum wells suffer from nearly degenerate conduction
band valleys, which compete with the spin degree of freedom in the formation of qubits …

Conveyor-mode single-electron shuttling in Si/SiGe for a scalable quantum computing architecture

I Seidler, T Struck, R Xue, N Focke… - npj Quantum …, 2022 - nature.com
Small spin-qubit registers defined by single electrons confined in Si/SiGe quantum dots
operate successfully and connecting these would permit scalable quantum computation …

Low-frequency spin qubit energy splitting noise in highly purified 28Si/SiGe

T Struck, A Hollmann, F Schauer, O Fedorets… - npj Quantum …, 2020 - nature.com
We identify the dominant source for low-frequency spin qubit splitting noise in a highly
isotopically-purified silicon device with an embedded nanomagnet and a spin echo decay …

Blueprint of a Scalable Spin Qubit Shuttle Device for Coherent Mid-Range Qubit Transfer in Disordered

V Langrock, JA Krzywda, N Focke, I Seidler… - PRX Quantum, 2023 - APS
Silicon spin qubits stand out due to their very long coherence times, compatibility with
industrial fabrication, and prospect to integrate classical control electronics. To achieve a …

Low disorder and high valley splitting in silicon

D Degli Esposti, LEA Stehouwer, Ö Gül… - npj Quantum …, 2024 - nature.com
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 …

SiGe quantum wells with oscillating Ge concentrations for quantum dot qubits

T McJunkin, B Harpt, Y Feng, MP Losert… - Nature …, 2022 - nature.com
Large-scale arrays of quantum-dot spin qubits in Si/SiGe quantum wells require large or
tunable energy splittings of the valley states associated with degenerate conduction band …

Practical strategies for enhancing the valley splitting in Si/SiGe quantum wells

MP Losert, MA Eriksson, R Joynt, R Rahman… - Physical Review B, 2023 - APS
Silicon/silicon-germanium heterostructures have many important advantages for hosting
spin qubits. However, controlling the valley splitting (the energy splitting between the two …