Science China Physics, Mechanics and Astronomy

, Volume 55, Issue 8, pp 1422–1426 | Cite as

1→N quantum controlled phase gate realized in a circuit QED system

  • GuiLong Gao
  • GenChang Cai
  • ShouSheng Huang
  • LongYing Tang
  • WenJing Gu
  • MingFeng Wang
  • NianQuan JiangEmail author


We propose an effective method to realize the quantum phase gate of one qubit simultaneously controlling N qubits. We use the system in which the transmon qubits are capacitively coupled to a superconducting transmission line resonator driven by a strong microwave field. In our scheme, the phase gate can be realized in a time (nanosecond-scale) much shorter than decoherence time (microsecond-scale), and it is more immune to the 1/f charge noise and has longer dephasing time due to the favorable properties of the transmon qubits in the system.


phase gate transmon qubit transmission line resonator 


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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • GuiLong Gao
    • 1
  • GenChang Cai
    • 2
  • ShouSheng Huang
    • 1
  • LongYing Tang
    • 1
  • WenJing Gu
    • 1
  • MingFeng Wang
    • 1
  • NianQuan Jiang
    • 1
    Email author
  1. 1.College of Physics and Electric InformationWenzhou UniversityWenzhouChina
  2. 2.College of MusicWenzhou UniversityWenzhouChina

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