Holes confined in quantum dots have gained considerable interest in the past few years due to their potential as spin qubits. Here we demonstrate two-axis control of a spin 3/2 qubit in natural Ge. The qubit is formed in a hut wire double quantum dot device. The Pauli spin blockade principle allowed us to demonstrate electric dipole spin resonance by applying a radio frequency electric field to one of the electrodes defining the double quantum dot. Coherent hole spin oscillations with Rabi frequencies reaching 140 MHz are demonstrated and dephasing times of 130 ns are measured. The reported results emphasize the potential of Ge as a platform for fast and electrically tunable hole spin qubit devices.

中文翻译：

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锗空穴自旋量子位。

由于量子点作为自旋量子位的潜力，限制在量子点中的空穴在过去几年中引起了相当大的兴趣。在这里，我们演示了天然 Ge 中自旋 3/2 量子位的两轴控制。量子位形成于小型双量子点装置中。泡利自旋封锁原理使我们能够通过将射频电场施加到定义双量子点的电极之一来演示电偶极子自旋共振。演示了拉比频率达到 140 MHz 的相干空穴自旋振荡，并测量了 130 ns 的移相时间。报告的结果强调了Ge作为快速电可调空穴自旋量子位器件平台的潜力。