Silicon and Germanium Hole Spin Qubits

Speaker: Dominik Zumbuhl

Affiliation: University of Basel

Abstract:

Keywords: Quantum Science: Quantum Computing, Spinqubits, Quantum transport, AI machine learning

Semiconductorspin qubits are leading candidates for full-scale quantum computation due totheir compatibility with industrial nanofabrication and their advantageousquantum properties. Holes spins can be coherently manipulated with all-electricalcontrol due to the spin-orbit interaction (SOI) without requiring micromagnets,but this also opens the door for decoherence by charge noise. In this talk, Iwill present recent progress on building spin-orbit qubits with holes in Ge/Sicore/shell nanowires and Si fin FETs, touching upon hole spin drivingmechanisms, anisotropic exchange, autonomous qubit tuning, maximizing qubitspeed and coherence at the same time using a sweet-spot, and a compactself-matched semiconductor gyrator. This work wassupported by the NCCR SPIN, the SwissNational quantum computation program of theSwiss NSF, the Swiss Nanoscience Institute (SNI), the Georg H. EndressFoundation, and the EU H2020 European Microkelvin Platform EMP, TOPSQUAD andQUSTEC.

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