论文标题
钻石中暗电子核自旋缺陷的纠缠
Entanglement of dark electron-nuclear spin defects in diamond
论文作者
论文摘要
多量量子寄存器的一种有前途的方法是使用光学上可寻址的旋转来控制环境中的多个深色电子旋转缺陷。虽然最近的实验观察到与这种暗旋转相干相互作用的签名，但要实现量子信息处理所需的个体控制是一个开放的挑战。在这里，我们证明了与多个P1中心相关的单个暗旋转的初始化，控制和纠缠，这些暗旋转是钻石中氮散布中心的自旋浴的一部分。我们认识到投影性测量值，以准备P1中心的多个自由度 - 它们的Jahn Teller轴，核自旋和电荷状态 - 并利用这些自由度在浴缸中有选择地访问多个P1。我们开发了对核和电子自旋的控制和单发读数，并使用它来证明两个P1中心的纠缠状态。这些结果为使用深色电子核自旋缺陷作为量子传感，计算和网络的Qubits提供了原则证明。
A promising approach for multi-qubit quantum registers is to use optically addressable spins to control multiple dark electron-spin defects in the environment. While recent experiments have observed signatures of coherent interactions with such dark spins, it is an open challenge to realize the individual control required for quantum information processing. Here we demonstrate the initialisation, control and entanglement of individual dark spins associated to multiple P1 centers, which are part of a spin bath surrounding a nitrogen-vacancy center in diamond. We realize projective measurements to prepare the multiple degrees of freedom of P1 centers - their Jahn-Teller axis, nuclear spin and charge state - and exploit these to selectively access multiple P1s in the bath. We develop control and single-shot readout of the nuclear and electron spin, and use this to demonstrate an entangled state of two P1 centers. These results provide a proof-of-principle towards using dark electron-nuclear spin defects as qubits for quantum sensing, computation and networks.
