Reza Kashtiban et.al.

2411.10437v1

The nitrogen vacancy centre in diamond is a versatile color center widely used for magnetometry, quantum computing, and quantum communications. In this article, we develop a new magnetometer using an ensemble of nitrogen vacancy centers and the Faraday effect. The sensitivity of our magnetometer is $300~nT/ \sqrt{Hz}$. We argue that by using an optical cavity and a high purity diamond, sensitivities in the femtotesla level can be achieved.

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