论文标题
在核合管中对相干单旋兴激发的量子传感
Quantum sensing of a coherent single spin excitation in a nuclear ensemble
论文作者
论文摘要
在一系列相互作用的物体集合中测量单量子的测量是在对新兴量子现象的研究中的变化性。一个孤立的核旋转合奏是由于其连贯性而是一个了不起的平台，但是检测其单个旋转激发仍然难以捉摸。在这里，我们在半导体量子点中使用电子自旋量子置量矩形来感知单个核旋转激发（一个核镁），通过200-kHz超细胞移动在28 GHz量子频率上具有1.9-PPM精度。我们证明了跨核物种和极性确定的多种模式的单块精度。最后，我们监测核镁的一致动力学以及量子相关的出现，竞争与破裂的竞争。这项工作的直接扩展是探测合奏的工程量子状态，包括长寿状态。
The measurement of single quanta in a collection of coherently interacting objects is transformative in the investigations of emergent quantum phenomena. An isolated nuclear-spin ensemble is a remarkable platform owing to its coherence, but detecting its single spin excitations has remained elusive. Here, we use an electron spin qubit in a semiconductor quantum dot to sense a single nuclear-spin excitation (a nuclear magnon) with 1.9-ppm precision via the 200-kHz hyperfine shift on the 28-GHz qubit frequency. We demonstrate this single-magnon precision across multiple modes identified by nuclear species and polarity. Finally, we monitor the coherent dynamics of a nuclear magnon and the emergence of quantum correlations competing against decoherence. A direct extension of this work is to probe engineered quantum states of the ensemble including long-lived memory states.
