Data and code underlying the publication "Entanglement of Dark Electron-Nuclear Spin Defects in Diamond"

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 challengeto realize the individual control required for quantum information processing. Here we demonstrate the heralded 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.<br><br>Data is licensed with CC BY 4.0.Software is licensed with MIT.

针对多量子比特量子寄存器（multi-qubit quantum registers），一种颇具前景的方案是利用光可寻址自旋（optically addressable spins）调控环境中的多个暗电子自旋缺陷（dark electron-spin defects）。尽管近期实验已观测到与这类暗自旋产生相干相互作用（coherent interactions）的特征信号，但实现量子信息处理所需的单个自旋调控仍是一项悬而未决的难题。本文中，我们实现了与多个P1中心（P1 centers）相关联的单个暗自旋的报信式初始化、调控与纠缠；这些P1中心是金刚石中氮空位中心（nitrogen-vacancy center）周围自旋浴（spin bath）的组成部分。我们通过投影测量（projective measurements）制备了P1中心的多个自由度——其姜-泰勒轴（Jahn-Teller axis）、核自旋与电荷态——并利用这些自由度选择性地寻址自旋浴中的多个P1中心。我们实现了核自旋与电子自旋的调控与单次读出（single-shot readout）技术，并以此演示了两个P1中心的纠缠态（entangled state）。本研究结果为将暗电子-核自旋缺陷用作量子比特，应用于量子传感、量子计算与量子网络领域提供了原理验证（proof-of-principle）。

数据集采用CC BY 4.0协议授权，软件采用MIT协议授权。