Regensburg 2025 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 29: Poster II

HL 29.43: Poster

Dienstag, 18. März 2025, 18:00–20:00, P1

Germanium MOSFETs for Quantum Computation — •Thembelihle Dlamini and Mónica Benito — Institute of Physics, University of Augsburg

The project focuses on studying hole dynamics and spin properties in Germanium (Ge) metal-oxide-semiconductor (MOS) nanostructures to achieve high-fidelity single-qubit operations. Leveraging MOSFETs superior compatibility with industrial manufacturing techniques, holes’ unique properties such as strong spin-orbit coupling, and Ge advantages over Si, GeMOS hole-spin qubits addresses some of the limitations of state-of-the-art spin quantum processors. The device-design phases will be assisted by three-dimensional structural simulations of the device. Moreover we will develop custom analytical models for holes in low-dimensional GeMOS geometries and the Ge/oxide interface by using symmetry analysis and k· p theory. Finally, we will investigate the effect of the multiband character of holes and their spin-orbit coupling in the effective spin representation of systems with a few holes in realistic quantum-dot potentials.

Keywords: Quantum dot; Qubits; Quantum Information; Semiconductor band structure; Electronic devices