Demonstration of superadiabatic population transfer in superconducting qubit<xref rid="cpb_27_6_063202fn1" ref-type="fn">*</xref> <fn id="cpb_27_6_063202fn1"> <label>*</label> <p>Project supported by the National Key Basic Research and Development Program of China (Grant No. 2016YFA0301802) and the National Natural Science Foundation of China (Grant Nos. 11274156, 11504165, 11474152, and 61521001).</p> </fn>

Demonstration of superadiabatic population transfer in superconducting qubit* *

Project supported by the National Key Basic Research and Development Program of China (Grant No. 2016YFA0301802) and the National Natural Science Foundation of China (Grant Nos. 11274156, 11504165, 11474152, and 61521001).

Li Mengmeng, Tan Xinsheng^†, Dai Kunzhe, Zhao Peng, Yu Haifeng^‡, Yu Yang

(color online) State tomography of the qubit for the second scheme. (a) The x projection 〈σ_x〉. (b) The y projection 〈σ_y〉. (c) The z projection 〈σ_z〉. (d) Trajectory of the qubit state vector on the Bloch sphere. The red circles are experimental data and the associated solid blue lines are the results of the theoretical prediction considering the decoherence and the dephasing. (e) A NOT gate is realized so that the initial state |0〉 becomes |1〉 at half of the evolution time.