A team of researchers led by Academician DU Jiangfeng from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) has made a significant breakthrough in exploring exotic spin interactions. They successfully utilized solid-state spin quantum sensors based on nitrogen-vacancy (NV) centers in diamond to investigate these interactions at the microscale.
), respectively. Those findings provide valuable insights and experimental constraints on these interactions.
Experimental searches for exotic spin interactions induced by new bosons have become a recent focus, as they hold the potential to address fundamental questions beyond the standard model. By employing diamond NV centers as quantum sensors, the team innovatively constructed high-sensitivity detectors capable of investigating spin interactions between electrons and nuclei.
To enhance the sensors' capabilities, the team realized the electron spin growth process of a high-quality diamond NV ensemble, upgrading the single-spin detector to an ensemble spin sensor. This advancement significantly improved the detection accuracy and realized experimental searches for exotic spin interactions.
In addition, the team leveraged the advantages of single NV centers as atomic-scale sensors and combined technology with silicon-based nanofabrication. This led to the creation of a scalable spin-mechanical quantum chip, improving observation constraints by two orders of magnitude at distances smaller than 100 nanometers.
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