I took the lead in simulating a curved quantum Hall effect in a cold atomic system

The reporter learned from the China University of Science and Technology that the Guo Guangcan academician team Professor Zhou Zhengwei’s team has made important progress in quantum simulation. The team collaborated with Rice University, the University of California, San Diego, and the Institute of Physics of the Chinese Academy of Sciences to present a A new scheme for simulating a magnetic unipolar field in an atomic system provides theoretical guidance for studying the quantum Hall effect on curved surfaces and finding novel singular quantum states in cold atomic systems. Related research results were published in the Physical Review Letters recently. on.

How to model the effective gauge field in a cold atomic system to achieve the quantum Hall effect of a neutral atom has always been an important topic in the supercooled gas quantum simulation. Previously, it was found that by rotating a bundle of supercooled quantum gas, The simulation of equivalent magnetic field in neutral atoms is expected to realize the quantum Hall effect in this system. However, due to the centrifugal force caused by the rotation, the atomic group will be thrown away from the bounded potential well, and it is difficult to observe the desired physical effect.

In view of this, Zhou Zhengwei et al. proposed a new scheme for simulating the quantum Hall effect in cold atoms. The analysis found that in a multi-component cold atomic gas, the existing magnetic field intensity can be controlled by dynamics, and real space can be realized. The simulation of an equivalent magnetic unipolar field; using the current experimental conditions, the cold atom group can be bound to a closed sphere.

Such a sphere is a sphere of effective magnetic unipolarity, which was awarded by Nobel laureate Hudson for understanding the fractional quantum Hall effect. However, although almost all current grand unified theories predict the existence of a magnetic monopole, In experiments, there has been no credible evidence for the existence of magnetic monopoles. Therefore, it was previously believed that this idea of ​​Huo Dan can only be used as a way of solving problems and it is difficult to achieve experimental results. Zhou Zhengwei, Zhou Xiangfa et al. Using the existing conditions ingeniously to construct an equivalent magnetic unipolar field, which overcomes the above difficulties, it is necessary to accurately implement the Huo Dan sphere in the experimental platform.