Eur. Phys. J. D (2013) 67: 252
https://doi.org/10.1140/epjd/e2013-40474-9

Regular Article

Perfect routing of quantum information in regular cavity QED networks

¹ Research Institute for Fundamental Sciences, University of Tabriz, 51666-16471 Tabriz, Iran
² Department of Theoretical Physics and Astrophysics, Faculty of Physics, University of Tabriz, 51666-16471 Tabriz, Iran

^a e-mail: n.behzadi@tabrizu.ac.ir

Received: 6 August 2013
Published online: 10 December 2013

Abstract

We introduce a scheme for perfect routing of quantum states and entanglement in regular cavity QED networks. The couplings between the cavities are quasi-uniform and each cavity is doped with a two-level atom. Quasi-uniform couplings leads the system to evolve in invariant subspaces. Combination the evolutions of the system in its invariant subspaces with quite simple local operations on atoms in the networks, gives the perfect routing of quantum states and entanglement through the network. To provide the protocol be robust due to decoherence arisen from photon loss, the field mode of the cavities are only virtually excited.