Autler–Townes Splitting in a ${\it \Delta}$-Type Quantum Three-Level System
Qi-Chun Liu, Han Cai, Ying-Shan Zhang, Jian-She Liu, Wei Chen**
Institute of Microelectronics, Department of Microelectronics and Nanoelectronics and Tsinghua National Laboratory of Information Science and Technology, Tsinghua University, Beijing 100084
Abstract：We observe the Autler–Townes splitting effect in a ${\it \Delta}$-type quantum three-level system, using the lowest three levels of a SQUID-type Al/AlOx/Al transmon qubit embedded in a three-dimensional copper microwave cavity. A control tone at different strengths is applied in resonance with the transition between the first and second excited states, while the spectra between each of them and the ground state are probed by another microwave tone. The experimental result shows the difference between the two spectra, and fits well with the Lindblad master equation model.
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2016, Vol. 33 
