Efficient routing quantum information in one-dimensional tight-binding array

Abstract

Abstract We present an efficient quantum router using a fully-engineered one-dimensional tight-binding array acting as quantum data bus. Quantum routing is achieved by weakly coupling the sender and the receivers to the data bus. We show that perfect transfer of a state between sender and a chosen receiver can be achieved via appropriately tuning the on-site energy applied on the site of the sender. A generalization of this model to the case of multiple receivers is then studied. The results show that the state is equally split between receivers who participate in communication. Moreover, that a similar idea can be used to create $W$ state between all receivers is further emphasized.