Guangzhou Key Laboratory of Quantum Precision Measurement was founded in April 2019 by the School of Mathematics of South China University of Technology and the Chinese Academy of Sciences Wuhan Institute of Precision Measurement Innovation, with the purpose of promoting the research of the quantum science project of the major R&D plan of Guangdong Province. The laboratory currently has more than 20 personnel, including 7 professors and 8 associate professors.

Main research areas:

Quantum precision measurement

Quantum Information

In the field of precision quantum measurement, the main research focuses on surface noise detection and weak alternating magnetic field detection.

In 1998, research found that the anomalous heating effect of ions may be due to the random variation of local work function caused by adsorbates on the electrode surface. Subsequent studies have shown that the spectral density of electric field noise depends on the concentration of adsorbed atoms on the surface of the trap electrode and the ambient temperature. Due to the higher sensitivity of trapped ions to the environment compared to commonly used surface measurement instruments, such as the heating noise intensity that ions can perceive being two orders of magnitude lower than ordinary noise, trapped ions can be used as highly sensitive surface probes as a new tool for studying surface science. Research has shown that the combination of quantum lock-in amplification technology and multi ion entangled states can be used to measure weak magnetic field signals beyond the standard quantum limit in noisy environments.

The laboratory's experimental work in quantum precision measurement is mainly based on ion trap systems and linear optical systems.

In the field of quantum information, we focus on theoretical research and corresponding experimental implementation. Quantum information is an interdisciplinary field between quantum mechanics and information science. It involves three major fields: quantum communication, quantum computing, and quantum measurement.

The fundamental issues of laboratory research on quantum information include quantum entanglement, quantum non locality, and quantum separability. At present, the laboratory is dedicated to researching the field of quantum key distribution. We are also conducting theoretical research and experimental simulations in quantum codes, quantum networks, and quantum machine learning.