Switzerland develops a quantum sensor that can accurately measure the frequency

The basic material of this quantum sensor is gemstone, which has an intact crystal lattice formed by carbon atoms. By infiltrating nitrogen atoms into it, nitrogen atoms replace part of the carbon atoms and form "holes" in the crystal lattice near the nitrogen atoms. , Forming the so-called "nitrogen-hole-center", this kind of hole is a quantum system (qubit) with two energy level states, with the help of microwave or laser, its state can be adjusted and placed in a kind of The state where two energy states are combined can measure weak electric or magnetic fields.


Because this coherent state lasts for a very short time and will soon be destroyed by external interference, it is difficult to obtain accurate results in one measurement. The scientific research team "extended" the measurement time through repeated measurements and developed an accurate "clock" to synchronize the results of multiple measurements. Experimental results show that the measurement accuracy of this quantum sensor reaches one millionth of a hertz, and the sensitivity is extremely high. The actual measured signal strength is 170 microtesla, which is only one percent of the magnetic field strength on the earth’s surface. The noise ratio reaches 10,000 to 1.

　　 This kind of quantum sensor can be made into nanometer-scale probes, and used with nuclear magnetic resonance technology to study the microstructure of matter, the movement of molecules and atoms, etc.

More details, please visit us at: https://www.qinsun-lab.com/index.html
Or write email us to: info@qinsun-lab.com