Recently, the Federal Institute of Technology in Zurich, Switzerland released news that the school solid state physics laboratory successfully developed a precise measurement of electromagnetic frequency of quantum sensors.
The basic material for such a quantum sensor is a gemstone with intact lattice of carbon atoms by which nitrogen atoms can penetrate into which some of the carbon atoms are replaced and "holes" are formed in the lattice near the nitrogen atom , Forming the so-called "nitrogen-hole-center", which is a quantum system with two energy levels (quantum bits) whose state can be regulated by means of microwaves or lasers, placed in a The two states can be complex, can measure weak electric field or magnetic field.
Due to the short duration of this coherent state, it will soon be destroyed by external disturbances, so it is difficult to obtain accurate results in one measurement. The research team "prolongs" the measurement time by iterating over and over again and develops an accurate "clock" to synchronize multiple determinations. Experimental results show that this quantum sensor measurement accuracy of one millionth of Hertz, and high sensitivity, the actual measured signal strength of 170 micro Tesla, only the equivalent of one percent of the Earth's surface magnetic field strength, the letter The noise ratio reaches 10000 to 1.
This quantum sensor can be made nano-scale probe, with nuclear magnetic resonance technology, used to study the material microstructure, molecular atomic movement process.
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