A method for measuring change of fine structure constant and a system using the method

Abstract

The invention discloses a method for measuring the variation of fine structure constants and a system using the method, belonging to the technical field of atomic frequency standards. Including an atomic clock group composed of at least 2 atomic clocks, and a counter group composed of at least 2 counters; the atomic clock includes an atomic clock physical system, an isolation amplifier, a frequency stability tester, a high-stable signal source, a microcontroller, a D / A conversion module, Constant current source module. In the present invention, the microprocessor uses the counter group to measure the output frequencies of different types of atomic clocks in the atomic clock group after frequency drift correction, and the daily output frequency of each atomic clock is represented by the power series of the fine structure constant, Time-dependent changes in the fine structure constant are detected. The invention can truly reflect the change of the output frequency of multiple atomic clocks, and then accurately measure the change of the fine structure constant.

Description

technical field [0001] The invention relates to the technical field of atomic frequency standards, in particular to a method for measuring changes in fine structure constants and a system using the method. Background technique [0002] The fine structure constant is a fundamental physical constant of the interaction strength between atoms or molecules, which is defined as: [0003] α = e 2 4 π e 0 hc or α = e 2 2 e 0 hc [0004] Among them: e is the basic charge, e 0 is the vacuum permittivity, is the reduced Planck constant, h is Planck's constant, and c is the speed of light. [0005] According to the recommended va...

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Problems solved by technology

Therefore, it is generally used to measure the change of the long-term frequency signal output of the atomic clock to measure the change of the fine structure constant. However, if an atomic clock works continuously for a long time, its output frequency value will change slowly over time, even in one direction. Variety

Therefore, if the frequency drift correction of multiple atomic frequency standards is not performed, the oscillation frequency output by multiple atomic clocks cannot be truly reflected, and the change of fine structure constants will have a large deviation

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