Canada-UK Quantum Technologies call: Diamond NV Sensors for Quantum-Limited Magnetic Field Measurements

量子测量是一种极大地提高各种领域测量灵敏度的方法。磁场测量是这方面的一个关键目标，因为对微小磁场的精确测量是地球物理勘探、各种技术领域和生物物理测量的关键参数。使用含有NV中心的固态钻石晶体进行光学检测的磁共振是测量微小磁场的一种有效方法。测量可以在没有其他技术所需的笨重低温冷却设备的情况下实现，例如鱿鱼。在这项提案中，我们建议设计、建造和演示一个使用钻石NV中心和一种新的量子Berry相位读出协议的量子磁强计。这将是朝着在地球物理和其他领域应用的紧凑型野外可部署单元迈出的一步。这样的装置有可能利用量子力学测量的力量来彻底改变磁场测量。

Quantum enabled measurements are a way to vastly improve measurement sensitivity in a variety of domains. Magnetic field measurement is a key target for this, since precision measurement of small magnetic fields is a crucial parameter for geophysical exploration, a variety of technological fields, and biophysical measurements. Optically detected magnetic resonance using solid-state diamond crystals containing NV centres is a powerful way to measure small magnetic fields. Measurements can be achieved without the bulky cryogenic cooling apparatus needed for other techniques such as SQUIDS. In this proposal we propose to design, build and demonstrate a quantum magnetometer using diamond NV centres and a novel quantum Berry phase readout protocol. This will be a step toward a compact field-deployable unit with applications in geophysics and other areas. Such a device has the potential to revolutionize magnetic field measurements using the power of quantum mechanical measurements.