Abstract
We theoretically present a protocol to realize the controlled phase gate with Cooper-pair box (CPB) qubits in circuit quantum electrodynamics (circuit QED) system. In this protocol, the one-dimensional transmission line resonator in circuit QED system acting as quantum data bus generates a common cavity mode and interacts with each CPB qubit. The Rabi frequencies of driven pluses can be designed with simple Gaussian or trigonometric functions by utilizing the universal SU(2) transformation. Moreover, the level configurations of CPB qubits have been reported by previous protocol (Feng and Zhang in Phys C 470:240–243, 2010). Thus, the protocol can be realized easily in experiment. In addition, the influence of various decoherence processes such as spontaneous emissions, dephasings of the CPB qubits and the decay of the cavity mode on the fidelity is discussed by numerical simulations. The results show that the protocol is robust against the decoherence and parameter variations. Therefore, the protocol may be useful for the fields of quantum computations.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
