title: Coherent population transfer between uncoupled or weakly coupled states in ladder-type superconducting qutrits.
abstract: Stimulated Raman adiabatic passage offers significant advantages for coherent population transfer between uncoupled or weakly coupled states and has the potential of realizing efficient quantum gate, qubit entanglement and quantum information transfer. Here we report on the realization of the process in the superconducting Xmon and phase qutrits--two ladder-type three-level systems in which the ground state population is coherently transferred to the second excited state via the dark state subspace. We demonstrate that the population transfer efficiency is no less than 96% and 67% for the two devices, which agree well with the numerical simulation of the master equation. Population transfer via stimulated Raman adiabatic passage is significantly more robust against variations of the experimental parameters compared with that via the conventional resonant π pulse method. Our work opens up a new venue for exploring the process for quantum information processing using the superconducting artificial atoms.
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: H K
authors.initials: HK
authors.lastname: Xu
authors.affiliation: Department of Physics, Zhejiang University, Hangzhou 310027, China.
authors.forename: C
authors.initials: C
authors.lastname: Song
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: W Y
authors.initials: WY
authors.lastname: Liu
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: G M
authors.initials: GM
authors.lastname: Xue
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: F F
authors.initials: FF
authors.lastname: Su
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: H
authors.initials: H
authors.lastname: Deng
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Tian
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: D N
authors.initials: DN
authors.lastname: Zheng
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.|Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA.
authors.forename: Siyuan
authors.initials: S
authors.lastname: Han
authors.affiliation: Department of Physics, Zhejiang University, Hangzhou 310027, China.
authors.forename: Y P
authors.initials: YP
authors.lastname: Zhong
authors.affiliation: Department of Physics, Zhejiang University, Hangzhou 310027, China.
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.affiliation: Institute of Microelectronics, Tsinghua University, Beijing 100084, China.|Tsinghua National Laboratory for Information Science and Technology (TNList), Beijing 100084, China.
authors.forename: Yu-xi
authors.initials: YX
authors.lastname: Liu
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.|Collaborative Innovation Center of Quantum Matter, Beijing, China.
authors.forename: S P
authors.initials: SP
authors.lastname: Zhao