A solid color center frequency adjustable microwave control system and method

Abstract

The invention discloses a solid color-center frequency-adjustable microwave control system and method. The system comprises a voltage regulation module, a solid color center sample, a microwave sourcesystem, a signal processing system, a frequency modulation antenna system and a control system, wherein the microwave source system can be used for providing a microwave signal, the signal is amplified and then passes through a frequency-adjustable microstrip antenna in the frequency modulation antenna system, microwave can be radiated to the solid color center sample by the frequency modulationantenna system due to feeding of the antenna, the integral impedance of the antenna can be changed through adjusting the voltage regulation module by a capacitance-variable diode in the frequency-adjustable microstrip antenna, so that the frequency adjustable function is achieved. The system is simple in experiment environment, small in size and good in robustness, a broadband frequency-adjustablemicrowave magnetic field with low return loss can be provided, and a support is provided for technologies such as quantum computation, quantum sensing and quantum transmission on the basis of a solidcolor center.

Description

technical field [0001] The invention relates to the technical field of quantum precision measurement, in particular to a frequency-adjustable microwave control system and method for a solid color center. Background technique [0002] The process of quantum precision measurement of solid color centers includes three processes: spin polarization, spin manipulation and spin detection. The measurement system mainly includes: optical control system, microwave control system, magnetic field control system, etc., among which the microwave control system provides an important basis for quantum precision measurement of solid color centers. In a high-concentration solid color center material, the number of spins involved in sensing is an order of magnitude leap compared with a single color center, but the antenna of the microwave control system in the quantum precision measurement based on the solid color center will have a near-field coupling phenomenon with the components in the sys...

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Problems solved by technology

In a high-concentration solid color center material, the number of spins involved in sensing is an order of magnitude leap compared with a single color center, but the antenna of the microwave control system in the quantum precision measurement based on the solid color center will have a near-field coupling phenomenon with the components in the system , and the resonant frequency of the antenna is affected by factors such as substrate materials, size parameters, processing errors, and electromagnetic environments, and its resonant frequency will shift, resulting in a mismatch between the solid color center and the resonant frequency of the microwave control system, causing the microwave magnetic field and the solid color The non-resonance of the heart will reduce the Rabi frequency, and make the system noise loss of robustness, which ultimately affects the accuracy of quantum precision measurement. Therefore, quantum precision measurement requires a microwave control system that can provide broadband frequency adjustment with low return loss. microwave magnetic field

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