Entangled Nonorthogonal States and Their Decoherence Properties
Osamu Hirota, S. J. van Enk, Kazuo Torii Nakamura, Masaki Sohma, Kentaro Kato · arXiv (Cornell University) · 2001
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.