利用缀饰态实现纳米金刚石中的选择性温度传感

Temperature selective thermometry with sub-microsecond time resolution using dressed-spin states in diamond

Versatile nanoscale sensors that are susceptible to changes in a variety of physical quantities often exhibit limited selectivity. This paper reports a novel scheme based on microwave-dressed spin states for optically probed nanoscale temperature detection using diamond quantum sensors, which provides selective sensitivity to temperature changes. By combining this scheme with a continuous pump-probe scheme using ensemble nitrogen-vacancy centers in nanodiamonds, a sub-microsecond temporal resolution with thermal sensitivity of 3.7 K$\cdot$Hz$^{-1/2}$ that is insensitive to variations in extern…

单个纳米金刚石与单个生物分子结合的NV中心电子顺磁共振

NV Center Electron Paramagnetic Resonance of a Single Nanodiamond Attached to an Individual Biomolecule

电子顺磁共振（EPR）是一种用于研究原子尺度生物分子结构和动力学的成熟而强大的工具，其关键限制是其灵敏度差，在典型实验中需要含有超过10^12个标记生物分子的样品。相比之下，单分子测量提供了对异质行为的更深入的了解，这些异质行为可以被整体测量所掩盖，并且对于阐明生物分子功能背后的分子机制通常是必不可少的。我们报告EPR测量一个单一的标记的生物分子，合并这两个强大的技术。我们选择性地标记一个单独的双链DNA分子与一个单一的纳米金刚石含有氮空位（NV）中心，并光学检测的顺磁共振的纳米金刚石探针中的NV自旋。光谱的分析表明，纳米金刚石探针具有完全的旋转自由度，并且与横向自旋弛豫时间相比，纳米金刚石探针的重定向的特征时间尺度是缓慢的。单纳米金刚石标记DNA的EPR光谱的演示为复杂生物分子系统的单分子磁共振研究的发展提供了基础。

Selective measurement of charge dynamics in an ensemble of nitrogen-vacancy centers in nano- and bulk diamonds

Nitrogen-vacancy (NV) centers in diamond have attracted considerable interest in sensing of weak magnetic fields, such as those created by biological systems. Detecting such feeble signals requires near-surface NV centers, to reduce the distance between NVs and sources. Moreover, dense ensembles of NVs are highly desirable to reduce measurement time. However, robust charge state switching is often observed in these systems, resulting in a complex interplay between charge and spin dynamics that can reduce the attainable level of spin polarization, and consequently, sensitivity. Understanding th…

Quantum Computation Protocol for Dressed Spins in a Global Field

Spin qubits are contenders for scalable quantum computation because of their long coherence times demonstrated in a variety of materials, but individual control by frequency-selective addressing using pulsed spin resonance creates severe technical challenges for scaling up to many qubits. This individual resonance control strategy requires each spin to have a distinguishable frequency, imposing a maximum number of spins that can be individually driven before qubit crosstalk becomes unavoidable. Here we describe a complete strategy for controlling a large array of spins in quantum dots dressed …

室温下的各向同性纳米级量子传感器

Isotropic Nanoscale Quantum Sensor at Room-Temperature

该研究利用金刚石中的中性氮-空位中心（NV⁰）开发了室温各向同性纳米级量子传感器，解决了传统色心量子传感器的离轴信号损失问题，可实现任意磁场方向的高灵敏度磁力测量，适用于生命科学与量子材料领域的纳米级磁力测绘。

Probing and manipulating embryogenesis via nanoscale thermometry and temperature control

Understanding the coordination of cell division timing is one of the outstanding questions in the field of developmental biology. One active control parameter of the cell cycle duration is temperature, as it can accelerate or decelerate the rate of biochemical reactions. However, controlled experiments at the cellular-scale are challenging due to the limited availability of biocompatible temperature sensors as well as the lack of practical methods to systematically control local temperatures and cellular dynamics. Here, we demonstrate a method to probe and control the cell division timing in C…