(a) Experimental proposal for QW with superconducting resonator-assisted quantum double-dot. The red dot represents the electron. The coupling between the resonator and the double-dot can be switched on and off via an external electric field along the x axis. The superducting resonator is driven by a field along the x axis for implementing the coin flipping. (b) The double-dot modeled as a double-well potential. The basis of the qubit states represents the electron either in the left or right potential via tunneling. The energy difference between the states |0〉 and |1〉 is Δ.