Josephson junction qubit network with current-controlled interaction
  We design and evaluate a scalable charge qubit chain network with controllable current-current coupling of neighbouring qubit loops via local dc-current gates. The network allows construction of general N-qubit gates. The proposed design is in line with current main stream experiments. 
J. Lantz, M. Wallquist, V.S. Shumeiko, and G. Wendin