Topology refers to the overall property that remains unchanged despite continuous local modifications. A coffee cup and a donut are no different to mathematicians because they have the same topological charge. Materials with various topological charges display diverse properties. Exploring phase transitions between different topological states brings prospects for novel materials and new physics.

Recently, a research team led by Prof. Du Jiangfeng, Prof. Lin Yiheng, and Prof. Luo Xiwang from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) experimentally observed the transitions between triply degenerate points (TDPs) with different topological charges through highly controllable quantum simulations. The study was published in Physical Review Letters.

To read more, click here.