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Direct microwave spectroscopy of Andreev bound states in planar Ge Josephson junctions

Autor: Hinderling, M., Kate, S. C. ten, Coraiola, M., Haxell, D. Z., Stiefel, M., Mergenthaler, M., Paredes, S., Bedell, S. W., Sabonis, D., Nichele, F.

Publikováno v: PRX Quantum 5, 030357 (2024)

We demonstrate microwave measurements of the Andreev bound state (ABS) spectrum in planar Josephson junctions (JJs) defined in Ge high mobility two-dimensional hole gases contacted by superconducting PtSiGe. The JJs and readout circuitry are located

Externí odkaz: http://arxiv.org/abs/2403.03800

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Impact of interface traps on charge noise, mobility and percolation density in Ge/SiGe heterostructures

Autor: Massai, L., Hetényi, B., Mergenthaler, M., Schupp, F. J., Sommer, L., Paredes, S., Bedell, S. W., Harvey-Collard, P., Salis, G., Fuhrer, A., Hendrickx, N. W.

Hole spins in Ge/SiGe heterostructure quantum dots have emerged as promising qubits for quantum computation. The strong spin-orbit coupling (SOC), characteristic of heavy-hole states in Ge, enables fast and all-electrical qubit control. However, SOC

Externí odkaz: http://arxiv.org/abs/2310.05902

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

Autor: Hendrickx, N. W., Massai, L., Mergenthaler, M., Schupp, F., Paredes, S., Bedell, S. W., Salis, G., Fuhrer, A.

Publikováno v: Nature Materials (2024)

Spin qubits defined by valence band hole states comprise an attractive candidate for quantum information processing due to their inherent coupling to electric fields enabling fast and scalable qubit control. In particular, heavy holes in germanium ha

Externí odkaz: http://arxiv.org/abs/2305.13150

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