Recent advances in hole-spin qubits

Y Fang, P Philippopoulos, D Culcer… - Materials for …, 2023 - iopscience.iop.org
In recent years, hole-spin qubits based on semiconductor quantum dots have advanced at a
rapid pace. We first review the main potential advantages of these hole-spin qubits with …

Universal control of four singlet–triplet qubits

X Zhang, E Morozova, M Rimbach-Russ… - Nature …, 2024 - nature.com
The coherent control of interacting spins in semiconductor quantum dots is of strong interest
for quantum information processing and for studying quantum magnetism from the bottom …

Sweet-spot operation of a germanium hole spin qubit with highly anisotropic noise sensitivity

NW Hendrickx, L Massai, M Mergenthaler, FJ Schupp… - Nature Materials, 2024 - nature.com
Spin qubits defined by valence band hole states are attractive for quantum information
processing due to their inherent coupling to electric fields, enabling fast and scalable qubit …

Nanoscale mapping of the 3D strain tensor in a germanium quantum well hosting a functional spin qubit device

C Corley-Wiciak, C Richter, MH Zoellner… - … applied materials & …, 2023 - ACS Publications
A strained Ge quantum well, grown on a SiGe/Si virtual substrate and hosting two
electrostatically defined hole spin qubits, is nondestructively investigated by synchrotron …

Fully tunable longitudinal spin-photon interactions in Si and Ge quantum dots

S Bosco, P Scarlino, J Klinovaja, D Loss - Physical Review Letters, 2022 - APS
Spin qubits in silicon and germanium quantum dots are promising platforms for quantum
computing, but entangling spin qubits over micrometer distances remains a critical …

Hard superconducting gap in germanium

A Tosato, V Levajac, JY Wang, CJ Boor… - Communications …, 2023 - nature.com
The co-integration of spin, superconducting, and topological systems is emerging as an
exciting pathway for scalable and high-fidelity quantum information technology. High …

Electrical operation of planar Ge hole spin qubits in an in-plane magnetic field

A Sarkar, Z Wang, M Rendell, NW Hendrickx… - Physical Review B, 2023 - APS
Hole spin qubits in group-IV semiconductors, especially Ge and Si, are actively investigated
as platforms for ultrafast electrical spin manipulation thanks to their strong spin-orbit …

Undoped strained Ge quantum well with ultrahigh mobility of two million

Z Kong, Z Li, G Cao, J Su, Y Zhang, J Liu… - … Applied Materials & …, 2023 - ACS Publications
We develop a method to fabricate an undoped Ge quantum well (QW) under a 32 nm
relaxed Si0. 2Ge0. 8 shallow barrier. The bottom barrier contains Si0. 2Ge0. 8 (650° C) and …

Modeling of planar germanium hole qubits in electric and magnetic fields

CA Wang, HE Ercan, MF Gyure, G Scappucci… - NPJ Quantum …, 2024 - nature.com
Hole-based spin qubits in strained planar germanium quantum wells have received
considerable attention due to their favorable properties and remarkable experimental …

Holes outperform electrons in group IV semiconductor materials

M Myronov, J Kycia, P Waldron, W Jiang… - Small …, 2023 - Wiley Online Library
A record‐high mobility of holes, reaching 4.3× 106 cm2 V− 1 s− 1 at 300 mK in an epitaxial
strained germanium (s‐Ge) semiconductor, grown on a standard silicon wafer, is reported …