中国物理B ›› 2017, Vol. 26 ›› Issue (9): 90301-090301.doi: 10.1088/1674-1056/26/9/090301

• GENERAL • 上一篇    下一篇

Invariants-based shortcuts for fast generating Greenberger—Horne—Zeilinger state among three superconducting qubits

Jing Xu(徐晶), Lin Yu(于琳), Jin-Lei Wu(吴金雷), Xin Ji(计新)   

  1. Department of Physics, College of Science, Yanbian University, Yanji 133002, China
  • 收稿日期:2017-03-17 修回日期:2017-05-04 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: Xin Ji E-mail:jixin@ybu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11464046).

Invariants-based shortcuts for fast generating Greenberger—Horne—Zeilinger state among three superconducting qubits

Jing Xu(徐晶), Lin Yu(于琳), Jin-Lei Wu(吴金雷), Xin Ji(计新)   

  1. Department of Physics, College of Science, Yanbian University, Yanji 133002, China
  • Received:2017-03-17 Revised:2017-05-04 Online:2017-09-05 Published:2017-09-05
  • Contact: Xin Ji E-mail:jixin@ybu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11464046).

摘要:

As one of the most promising candidates for implementing quantum computers, superconducting qubits (SQs) are adopted for fast generating the Greenberger-Horne-Zeilinger (GHZ) state by using invariants-based shortcuts. Three SQs are separated and connected by two coplanar waveguide resonators (CPWRs) capacitively. The complicated system is skillfully simplified to a three-state system, and a GHZ state among three SQs is fast generated with a very high fidelity and simple driving pulses. Numerical simulations indicate the scheme is insensitive to parameter deviations. Besides, the robustness of the scheme against decoherence is discussed in detail.

关键词: Greenberger-Horne-Zeilinger state, superconducting qubits, shortcuts to adiabaticity

Abstract:

As one of the most promising candidates for implementing quantum computers, superconducting qubits (SQs) are adopted for fast generating the Greenberger-Horne-Zeilinger (GHZ) state by using invariants-based shortcuts. Three SQs are separated and connected by two coplanar waveguide resonators (CPWRs) capacitively. The complicated system is skillfully simplified to a three-state system, and a GHZ state among three SQs is fast generated with a very high fidelity and simple driving pulses. Numerical simulations indicate the scheme is insensitive to parameter deviations. Besides, the robustness of the scheme against decoherence is discussed in detail.

Key words: Greenberger-Horne-Zeilinger state, superconducting qubits, shortcuts to adiabaticity

中图分类号:  (Entanglement production and manipulation)

  • 03.67.Bg
42.50.Dv (Quantum state engineering and measurements) 42.50.Ex (Optical implementations of quantum information processing and transfer)