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China University of Science and Technology Successfully Developed a Single Spin Quantum Sensor for Searching for New Particles
ã€Chinese Instrument Network Instrument R&D】 Recently, the Chinese Academy of Sciences’ University of Science and Technology University’s Du Jiangfeng’s CAS Key Laboratory of Micro Magnetic Resonance has proposed and implemented a single-electron spin quantum sensor for searching for an axicon, expanding the search process to Asia. Micrometer scale. The results were published in the February 21 issue of Nature Communications, Nature Communications 9, 739 (2018), with the topic "Searching for an exotic spin-dependent interaction with a single electron-spin quantum sensor."
(Image from the Internet, invaded)
Finding new particles outside the standard model of particle physics is crucial for exploring new physics. Because these new particles are often used to fill in the current theoretical deficiencies in particle physics, astrophysics, and cosmology, for example, particle quality problems, strong CP problems, positive and negative matter asymmetries, and dark matter and dark energy. The physical nature. Among a number of solutions, a simple and effective theoretical assumption is the introduction of an ultra-light mass axion or axon-like sub-particles. It has been speculated that these new particles may play a new transmission medium in the interaction between electrons and nuclei, so such interactions provide valuable opportunities for experimental exploration of new particles. In recent years, a series of sophisticated experimental devices have been developed to conduct electronic and nuclear interaction searches within a force range of 20 microns or more. However, carrying out experimental research within a shorter range of force faces a series of challenges: How to build a sensor with a sufficiently small size? How to design the sensor geometry to allow electrons and nucleons to get close enough? How to increase the sensitivity of the sensor to give a meaningful definition? How to effectively isolate the environmental noise, especially the inevitable electromagnetic noise?
In this work, Du Jiangfeng's team proposed and implemented a new detection method that uses electron spins on the NV color center near the diamond as a sensor to search for electron-nucleon interactions in the range of less than 20 microns. The team prepared NV color centers within 10 nanometers from the diamond surface as detectors, developed corresponding electronic equipment and quantum control methods, and solved the above-mentioned series of short-range exploration challenges. Experiments have shown that the new sensor can explore a force range of 0.1 μm to 23 μm. Researchers have not found evidence of the presence of new particles in their effective range, providing new observational constraints for the exploration of electron-nuclear interactions. This new method can also be extended to other spin-related new interaction studies, thus providing possibilities for the use of single-spin quantum sensors to study new physics beyond the standard model, promising to stimulate cosmology, astrophysics and high-energy physics Wait for a wide range of basic science interests. The reviewers highly valued the work "is a novel experimental method. I believe this technology will simultaneously stimulate the exploration of new areas of interest in both the force and magnetic measurement." "The method demonstrated is ... very convincing, for direct detection. The large-quality axe opens up an experimental window."
This work is also the result of cross-disciplinary cooperation among HKUST’s multiple disciplines. The joint work is Rong Xing, Yan Jianpei, and Wang Mengqi of the Key Laboratory of Micro Magnetic Resonance, Chinese Academy of Sciences. The collaborators are Prof. Cai Yifu of the Department of Astronomy of the Chinese University of Science and Technology and Zou Chongwen, National Synchrotron Radiation Laboratory. Associate researcher.
The study was funded by the Ministry of Science and Technology, the National Natural Science Foundation of China, the Chinese Academy of Sciences and Anhui Province.
(Original title: A single-spin quantum sensor developed by our laboratory for searching new particles outside the standard model)
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