At present, in astronomy and physics, the study of dark matter and its related physics is an extremely important research field to be explored. The research around this direction can make us better understand the existence of substances accounting for about a quarter of the universe, which may give birth to a series of major basic scientific breakthroughs. The standard model of particle physics is a very successful theoretical model to describe the microscopic particle world, but the standard model does not include dark matter. It is necessary to find particles outside the standard model as candidates for dark matter theoretically and experimentally. 1984, scientists proposed a novel spin interaction outside the standard model, which can be induced by new bosons outside the standard model, such as axions, axions-like, dark photons, Z' bosons and so on. Since then, a series of complex scientific experiments have been used to explore these novel spin interactions.

Previously, the team of Academician Du Jiangfeng proposed for the first time in the world to use the nitrogen vacancy defect in diamond as a single spin sensor to find novel spin interactions. Based on this single spin sensor, the new interaction between polarized spins is found, and the optimal experimental limit of micron scale is given. All these works are based on the static new spin interaction, which fully demonstrates the ability of diamond nitrogen-vacancy defect single spin quantum sensor to explore new physics at micro-nano scale.

On the basis of the previous work, the research group carried out an experimental exploration of a new type of spin interaction related to speed. They used a timely tuning fork to drive the mass source to do simple harmonic vibration in the direction perpendicular to the diamond surface, and carefully designed the experimental sequence to transform the new interaction into the quantum phase information of the single-spin quantum sensor. In this experiment, a new experimental definition of speed-dependent spin interaction in micron scale is given, in which the definition of 200 micron is four orders of magnitude stricter than the previous experimental results based on cesium, ytterbium and thallium atomic spectra.

The reviewer spoke highly of the work: "This article shows the marriage of quantum measurement technology and basic physical inspection, which is very attractive to physicists."

Editor/Fan Hui