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has been cited by the following article:

• TITLE: Generation of Multipartite Entangled States Using Switchable Coupling of Cooper-Pair-Boxes

  AUTHORS: Stefan J. Rinner, Tindaro Pittorino

  KEYWORDS: Switchable, Variable Interaction

  JOURNAL NAME: Journal of Modern Physics, Vol.11 No.10, October 14, 2020

  ABSTRACT: We propose a scheme for a switchable coupling between several Cooper-pair boxes in the charge regime. The switch is embodied in a SQUID element contained in the center conductor of a transmission-line resonator. Altering the flux bias through the SQUID allows for changing the effective resonator length. Thus the position of the nodes and anti-nodes of the relevant eigenmodes changes and leads to a variable interaction strength between qubit and cavity vacuum field. For the coupled qubits the interaction is dispersive. An example for the application of this switch is the generation of multipartite entangled states for three and four charge qubits. Although used as a discrete switch in the present proposal, the combined system of SQUID module integrated into the transmission line may be operated continuously as well.