US 11,808,831 B2
Measurement apparatus and measurement method
David Ernst Herbschleb, Kyoto (JP); Norikazu Mizuochi, Kyoto (JP); and Yoshiharu Yoshii, Natori (JP)
Assigned to SUMIDA CORPORATION; and Kyoto University
Appl. No. 17/773,530
Filed by SUMIDA CORPORATION, Tokyo (JP); and Kyoto University, Kyoto (JP)
PCT Filed Dec. 17, 2020, PCT No. PCT/JP2020/047122
§ 371(c)(1), (2) Date Apr. 29, 2022,
PCT Pub. No. WO2021/132009, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-233583 (JP), filed on Dec. 24, 2019.
Prior Publication US 2022/0373628 A1, Nov. 24, 2022
Int. Cl. G01R 33/54 (2006.01); G01R 33/56 (2006.01)
CPC G01R 33/543 (2013.01) [G01R 33/5608 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A measurement apparatus, comprising:
a magnetic resonance member arranged in a measurement target AC physical field, and in which a quantum operation can be performed in a specific quantum system;
a coil that applies a magnetic field of a microwave to the magnetic resonance member;
a high frequency power supply that causes the coil to conduct a current of the microwave;
an irradiating device that irradiates the magnetic resonance member with light in a DC physical field measurement sequence;
a detecting device that detects from the magnetic resonance member a physical phenomenon corresponding to the measurement target AC physical field in the DC physical field measurement sequence;
a measurement control unit that performs the DC physical field measurement sequence a predetermined plural times, and in each of the plural times of the DC physical field measurement sequence, (a) controls the high frequency power supply and the irradiating device, and (b) determines a detection value of the physical phenomenon detected by the detecting device;
a calculation unit that calculates a measurement result for a specific time span of the measurement target AC physical field on the basis of the detection values corresponding to the plural times of the DC physical field measurement sequence;
wherein the calculation unit performs the DC physical field measurement sequence the predetermined plural times every period of the measurement target AC physical field, and calculates averages of the measurement results for the specific time span that are obtained over plural periods of the measurement target AC physical field, and thereby decreases noise in the measurement result for the specific time span; and
the number of the measurement results for the specific time span is same as the number of plural periods.