Circuit QED: generation of two-transmon-qutrit entangled states via resonant interaction

  • Xi-Mei Ye
  • Zhen-Fei Zheng
  • Dao-Ming Lu
  • Chui-Ping Yang


We present a way to create entangled states of two superconducting transmon qutrits based on circuit QED. Here, a qutrit refers to a three-level quantum system. Since only resonant interaction is employed, the entanglement creation can be completed within a short time. The degree of entanglement for the prepared entangled state can be controlled by varying the weight factors of the initial state of one qutrit, which allows the prepared entangled state to change from a partially entangled state to a maximally entangled state. Because a single cavity is used, only resonant interaction is employed, and none of identical qutrit–cavity coupling constant, measurement, and auxiliary qutrit is needed, this proposal is easy to implement in experiments. The proposal is quite general and can be applied to prepare a two-qutrit partially or maximally entangled state with two natural or artificial atoms of a ladder-type level structure, coupled to an optical or microwave cavity.


Qutrit Transmon qutrit Entangled state Cavity Circuit QED 



This work was supported in part by the Natural Science Foundation of Fujian Province of China under Grant No. 2015J01020, the Zhejiang Natural Science Foundation under Grant No. LZ13A040002, the NKRDP of China (Grant No. 2016YFA0301802), and the National Natural Science Foundation of China under Grant Nos. (11074062, 11374083, 11774076).

Compliance with ethical standards

Conflict of interest

All authors declare that they have no conflict of interest.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Xi-Mei Ye
    • 1
  • Zhen-Fei Zheng
    • 2
  • Dao-Ming Lu
    • 1
  • Chui-Ping Yang
    • 3
  1. 1.College of Mechanic and Electronic EngineeringWuyi UniversityWuyishanChina
  2. 2.Department of PhysicsUniversity of Science and Technology of ChinaHeifeiChina
  3. 3.Department of PhysicsHangzhou Normal UniversityHangzhouChina

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