Chinese scientists have gained important progress in self -spin quantum precision measurement

Peng Xinhua Research Team, a professor at the Key Laboratory of the Micro Magnetic Resonance Key Laboratory of the Chinese Academy of Sciences of China, made important progress in the field of self -spin quantum precision measurement. Sla (that is, 10 negatives of Fifth Fifty Tesla). Relevant research results were published online online in the "Physical Review Express" and were selected as "Edit Recommendation" article. The reviewer believes that the work "provides super sensitive methods for precision measurement and testing new physical laws."

With the development of the basic research and science and technology of quantum mechanics, quantum enhancement enhancement can be achieved through physical systems such as atoms, molecules, and spin. Compared with the traditional amplification technology based on classic circuits, the quantum enhancement enlarged technology has lower quantum noise and higher amplification gain, which provides strong research methods for improving measurement accuracy, and has received widespread attention and research.

However, the current exploration of quantum enlargement precision measurement technology is still limited, and the realization of signal amplification mainly depends on the inherent discrete energy level of the quantum system. Due to the limitation of the adjustable harmoniousness, the frequency of the inherent discrete and jump of the quantum system often cannot meet the operating frequency required for amplifying the operating frequency. Therefore, the performance of quantum amplifier is limited, such as working bandwidth, frequency and gain. If it can overcome the above difficulties, the performance of quantum enlarged technology will be greatly improved, which is of great significance to detect extremely weak electromagnetic waves and strange particles.

The researcher of the Peng Xinhua Research Group proposed the Floquet self -rotating quantum amplification technology, overcoming the restrictions of small detection frequency range in the past, and realizing the extremely weak magnetic field amplification of multiple frequencies. This technology benefits from the "self -spin -off technology" and "Floquet modulation technology" previously proposed by the research team, organically combining the two to promote the quantum amplification technology to the Floquet self -spin system. Through theoretical computing and experimental research, the research team first demonstrated that the Floquet system can achieve multiple frequency -to -magnetic fields at the same time, and the measurement sensitivity has reached the flying level.

It is reported that for the first time, the quantum amplifier technology is extended to the Floquet spin system, which is expected to further promote it to other quantum amplifiers to achieve a new type of quantum amplifier- "Floquet quantum amplifier". (Guangming Daily)

- END -