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We introduce a scheme for perfect routing of quantum states and entanglementin regular cavity QED networks. The couplings between the cavities arequasi-uniform and each cavity is doped with a two-level atom. Quasi-uniformcouplings leads the system to evolve in invariant subspaces. Combination theevolutions of the system in its invariant subspaces with quite simple localoperations on atoms in the networks, gives the perfect routing of quantumstates and entanglement through the network. To provide the protocol be robustdue to decoherence arisen from photon loss, the field mode of the cavities areonly virtually excited.

the european physical journal. d, atomic, molecular and optical physics/the european physical journal. d, atomic, molecular, optical and plasma physics

Perfect routing of quantum information in regular cavity QED networks