PRECISION SOLID-STATE QUANTUM GYROSCOPE OF CONTINUOUS ACTION ON BASIS OF SPIN ENSEMBLE IN DIAMOND Russian patent published in 2019 - IPC G01C19/62 

FIELD: physics.

SUBSTANCE: use: for measurements using a quantum gyroscope. Summary of invention consists in the fact that measurement of rotation in space using a rotation sensor comprising a diamond plate with colour centres, including the following steps, calibrating the sensor by translating the colour centres of the electron spins into a state with m_s= 0 with projection of electron spins on centre axis NV equal to zero, due to constant exposure of diamond plate to incoherent optical field, as well as transfer of part of electronic spins system corresponding to nuclear spin projection m_i= 1, m_i= -1, colour centres from state m_s= 0 to state m_s= (+/-)1 and m_i= (-/+)1 with the projection of said spins on the NV axis of the centre, which is equal to plus one unit |0, 1} → |-1, 1} and minus the unit |0, -1} → |1, -1}, due to constant and simultaneous action on diamond plate of optical incoherent radiation, two-frequency microwave radiation and magnetic field, after which systems of nuclear spins are transferred into state m_i= 0 due to constant action on the diamond plate of radio-frequency radiation (RF), which realizes transitions |1, -1} ↔ |1, 0}, |-1, 1} ↔ |-1, 0}, bringing the sensor into a state which is sensitive to rotation by applying a nuclear spin in the state m to the system_s= 0, m_i= 0 of resonance radio-frequency radiation, minimizing rotation measurement error by modulation of microwave radiation frequencies in the vicinity of two resonance frequencies corresponding to different values of electron spin, recording the electron spin response from the diamond plate fluorescence signal at modulation frequencies and generating the microwave signal correcting frequency based on the measured error signal, returning the radiation frequencies to resonance circuit maximums, calculating at specified periodicity angular rotation speed of sensor as difference of continuously controlled frequency of radio-frequency radiation and known value of quadrupole splitting of nuclear spin, wherein frequency adjustment of radio-frequency radiation is carried out by modulating the frequency of radio-frequency radiation in the vicinity of the resonance frequency of the nuclear spin, Note here that nuclear spin response is detected from fluorescence signal of diamond plate at modulation frequency and corrective signal frequency is generated on the basis of measured error signal returning radiation frequency to maximum of resonance circuit.

EFFECT: technical result is possibility of measuring absolute rotation of sensitive sensor element.

13 cl, 10 dwg