[Th-P] Semiconductor hybrid systems and novel devices

[Th-P-114] Geometry Optimization of Multi-Terminal Andreev Spin Qubits in Germanium

〇Juan Daniel Torres¹, Anton Akhmerov¹ (1. Delft University of Technology (Netherlands))

We study Germanium three-terminal Josephson junctions for Andreev spin qubits. Spin-orbit splitting sets the scale for qubit control. Using electrostatic and quantum-device modeling, we show that device geometry provides an effective tuning knob for engineering low-energy spinful Andreev spectra.