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In this paper, we propose a protocol to prepare W states with superconductingquantum interference devices (SQUID) by using dressed states. Through choosinga set of dressed states suitably, the protocol can be used to accelerate theadiabatic passages while additional couplings are unnecessary. Moreover, we canoptimize the evolution of the system with the restraint to the populations ofthe intermediate states by choosing suitable controlled parameters. Numericalsimulations show that the protocol is robust against the parameter variationsand decoherence mechanisms. Furthermore, the protocol is faster and more robustagainst the dephasing, compared with that by the adiabatic passages. As for theRabi frequencies of pulses designed by the method, they can be expressed by thelinear superpositions of Gaussian functions, which does not increasedifficulties to the experiments. In addition, the protocol could be controlledand manipulated easily in experiments with a circuit quantum electrodynamicssystem.

Fast preparation of W states with superconducting quantum interference devices by using dressed states