Entangled Nonorthogonal States and Their Decoherence Properties
Osamu Hirota, Steven J.van Enk, Kazuo Nakamura, Masaki Sohma, and, Kentaro Kato
TL;DR
This paper investigates quasi-Bell states, especially entangled coherent states, demonstrating their enhanced robustness against decoherence from photon absorption compared to standard Bell states.
Contribution
It introduces properties of entangled nonorthogonal states and shows that entangled coherent states are more resilient to decoherence effects.
Findings
Entangled coherent states are more robust against photon absorption.
Quasi-Bell states exhibit unique properties as superpositions of nonorthogonal states.
Enhanced decoherence resistance compared to standard Bell states.
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.
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Taxonomy
TopicsQuantum Information and Cryptography · Quantum optics and atomic interactions · Quantum Mechanics and Non-Hermitian Physics