The 5^th International Workshop on Rydberg Atoms and Molecules（IWRAM-V）was successfully held from October 28^th to 31^st, 2021 by the Innovation Academy for Precision Measurement Science and Technology (APM). More than one hundred scholars from home and abroad participated in this workshop online and conducted in-depth discussions on a series of application fields of Rydberg atoms and molecules. APM Professor XU Peng chaired the workshop and presided over the opening ceremony.

Rydberg atoms and molecules have a unique internal structure, which can provide strong dipole-dipole interaction and has been a hot research topic in recent years. The research has involved many sub-fields of physics, including basic physics, quantum optics, multi-body physics, quantum information, quantum simulation, and precision measurement. IWRAM was started in 2016 and has been held for four consecutive years, respectively in Changchun (2016), Taiyuan (2017), Shanghai (2018) and Hangzhou (2019). Affected by the COVID-19 epidemic, the 5^th workshop originally scheduled to be held in Wuhan in 2020 was postponed for one year.

Professor ZHAN Mingsheng delivered a speech to officially start the workshop. Then, 34 domestic and foreign scholars, including Professor Mark Saffman of the University of Wisconsin-Madison, Professor Antoine Browaeys of the French National Center for Scientific Research, Professor Jaewook Ahn of the Korea Advanced Institute of Science and Technology, and Professor Kenji Ohmori of the Institute for Molecular Science of the National Institutes of Natural Sciences in Japan, Professor WANG Taotao from the Lukin Group of Harvard University, Professor YOU Li of Tsinghua University, Professor ZHAO Jianming of Shanxi University, and APM Professor XU Peng, gave invited reports in the workshop, covering progress in quantum simulation, quantum computing, quantum optics, quantum sensing and other fields. These reports are of high quality and the content closely follows the international frontier, which has won unanimous praise from the participants.

The successful workshop promoted the exchanges and cooperation among colleagues in the field of Rydberg atoms and molecules research at home and abroad, and provided a high-level information exchange platform for experts, scholars and students in related fields. The workshop shared research results and scientific research experience, discussed the prospects of Rydberg atoms and molecules research, expanded APM’s international academic influence in the field, and greatly promoted the development of Rydberg atoms and molecules research in APM.