Ge hole spin qubit

Abstract

Holes confined in quantum dots have gained considerable interest in the past few years due to their potential as spin qubits. Here we demonstrate double quantum dot devices in Ge hut wires. Low temperature transport measurements reveal Pauli spin blockade. We demonstrate electric-dipole spin resonance by applying a radio frequency electric field to one of the electrodes defining the double quantum dot. Next, we induce coherent hole spin oscillations by varying the duration of the microwave burst. Rabi oscillations with frequencies reaching 140MHz are observed. Finally, Ramsey experiments reveal dephasing times of 130ns. The reported results emphasize the potential of Ge as a platform for fast and scalable hole spin qubit devices.

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• Spins in few-electron quantum dots
• Electron transport through double quantum dots
• A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise
• Storing quantum information for 30 seconds in a nanoelectronic device
• Interfacing spin qubits in quantum dots and donors - hot, dense and coherent
• A CMOS silicon spin qubit
• Electrical control of a long-lived spin qubit in a Si/SiGe quantum dot
• A Coherent Spin-Photon Interface in Silicon
• Strong spin-photon coupling in silicon
• Electric Dipole Induced Spin Resonance in Quantum Dots
• Spin decoherence of a heavy hole coupled to nuclear spins in a quantum dot
• A fault-tolerant addressable spin qubit in a natural silicon quantum dot
• Spin Relaxation in Ge/Si Core-Shell Nanowire Qubits
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• Direct Rashba spin-orbit interaction in Si and Ge nanowires with different growth directions
• Strong and Tunable Spin-Orbit Coupling of One-Dimensional Holes in Ge/Si Core/Shell Nanowires
• Monolithic growth of ultra-thin Ge nanowires on Si(001)
• Hole Spin Coherence in a Ge/Si Heterostructure Nanowire
• Heavy hole states in Germanium hut wires
• Spin-orbit interactions in inversion-asymmetric 2D hole systems: a variational analysis
• Electric-field dependent g-factor anisotropy in Ge-Si core-shell nanowire quantum dots
• Single-shot readout of hole spins in Ge
• Magnetic Field Evolution of Spin Blockade in Ge/Si Nanowire Double Quantum Dots
• Anisotropic Pauli spin blockade in hole quantum dots
• SiGe quantum dots for fast hole spin Rabi oscillations
• Spin blockade as a probe of Zeeman interactions in hole quantum dots
• Fast Hole Tunneling Times in Germanium Hut Wires Probed by Single-Shot Reflectometry

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