Entangled Nonorthogonal States and Their Decoherence Properties

Abstract

This paper presents properties of the so-called quasi-Bell states: entangled states written as superpositions of nonorthogonal states. It is shown that a special class of those states, namely entangled coherent states, are more robust against decoherence due to photon absorption than the standard bi-photon Bell states.

13 pages, 1 figure. Submitted to J of Physics A