We propose an efficient scheme to prepare W state of $$N$$ N superconducting (SC) qubits in $$N$$ N spatially separated coplanar waveguide (CPW) resonators via adiabatic passage. The $$N$$ N CPW resonators, each trapping a SC qubit, are coupled only by a superconducting coupler (SCC) qubit. Based on a circuit quantum electrodynamics system, our scheme can be controlled and implemented easily in experiment. As a model of a plurality of separated cavities coupled to a SCC qubit, our protocol can be useful in scalable distributed quantum networks. By introducing adiabatic passage into our model, there is no need to control the Rabi frequency of classical field and the interaction time precisely during the whole operation. Also, the dissipation from the resonators and the energy relaxation can be omitted approximately.
Quantum Information Processing – Springer Journals
Published: Apr 14, 2015
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