Circularly polarized microwave control system and method of diamond color center energy level

Abstract

The invention discloses a circularly polarized microwave control system and method of a diamond color center energy level. The system comprises a diamond sample, a microwave source system, a phase adjustment system, a microwave transmission system and a control system. The microwave source system can provide two paths of microwave signals, wherein when one path of signals pass through the phase adjustment system, the control system controls the phase change of this path of signals based on a program, and the microwave transmission system receives the two paths of signals. Due to the special shape and size design of a microstrip antenna resonance device, the generated broadband circularly polarized microwave magnetic field with low echo loss and uniformity in an area can be used for precisecontrol on the diamond color center energy level, and the process is an important basis for quantum precision measurement. The system has the advantages of simple experimental environment, small size, low energy consumption and good robustness, facilitates controlling the flip between electron spin ground state energy levels, and provides a support for the technologies of quantum computing, quantum sensing, quantum transmission and the like based on diamond color centers.

Description

technical field [0001] The invention relates to the technical field of quantum precision measurement, in particular to a circularly polarized microwave control system and method for diamond color center energy levels. Background technique [0002] The quantum precision measurement of the diamond color center realizes the polarization and detection of the NV color center ensemble through the confocal fluorescence microscope system. The system mainly includes: optical control system, microwave control system, magnetic field control system, etc. Among them, the microwave control system uses circularly polarized microwaves to precisely control the inversion of the ground state energy level of the electron spin of the color center, which provides an important basis for the quantum precision measurement of the diamond color center. In high-concentration diamond materials, it is very difficult to precisely control the ground state energy level of the color center electron spin ens...

AI Technical Summary

Problems solved by technology

The existing microwave control system for the ground state energy level of the diamond color center mainly includes a system in which the color center ground state energy level undergoes Zeeman splitting through a 500Gs external magnetic field, and a microwave radio frequency resonance field polarization system. The microwave control system is large in size and high in cost. , and the quantum precision measurement experiment needs a broadband circularly polarized microwave magnetic field with low return loss and uniform magnetic field within the area

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