Dynamically modulated Autler-Townes effect in a transmon qubit

Jiazheng Pan; Yunyi Fan; Yongchao Li; Xin Dai; Xingyu Wei; Yapeng Lu; Chunhai Cao; Lin Kang; Weiwei Xu; Jian Chen; Guozhu Sun; Peiheng Wu

doi:10.1103/PhysRevB.96.024502

Dynamically modulated Autler-Townes effect in a transmon qubit

Jiazheng Pan, Yunyi Fan, Yongchao Li, Xin Dai, Xingyu Wei, Yapeng Lu, Chunhai Cao, Lin Kang, Weiwei Xu, Jian Chen, Guozhu Sun, Peiheng Wu

DOI 10.1103/PhysRevB.96.024502 · Physical Review B

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Abstract

By applying a coupling microwave field gated by random-telegraph-noise (RTN), we report the experimental demonstration of dynamically modulated Autler-Townes effect (ATE) in an artificial atom—a superconducting transmon qubit—and obtain the distinguished characteristics when a system is affected by RTN. By further applying another coupling microwave filed on the transmon, we use an intense bichromatic field to couple the energy levels. Depending on the detuning of the couplers, remarkable interference patterns emerge in the spectrum, which come from the dressed states induced by the modulated ATE. Numerical calculations agree well with the experimental data.