Microwave electrometry with bichromatic electromagnetically induced transparency in Rydberg atoms Mingzhi Han, He Hao, Xiaoyun Song, Zheng Yin, Michal Parniak, Zhengmao Jia and Yandong Peng EPJ Quantum Technol., 10 1 (2023) 28 Published online: 14 July 2023 DOI: 10.1140/epjqt/s40507-023-00184-z