Entanglement protection of classically driven qubits in a lossy cavity

Abstract Quantum technologies able to manipulating single quantum systems, are presently developing. Among the dowries of the quantum realm, entanglement is one of the basic resources for the novel quantum revolution. Within this context, one is faced with the problem of protecting the entanglement...

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Autores principales:	Alireza Nourmandipour, Azar Vafafard, Ali Mortezapour, Roberto Franzosi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3ff22075f2324200841370690bd6ce1c
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spelling	oai:doaj.org-article:3ff22075f2324200841370690bd6ce1c2021-12-02T16:27:50ZEntanglement protection of classically driven qubits in a lossy cavity10.1038/s41598-021-95623-12045-2322https://doaj.org/article/3ff22075f2324200841370690bd6ce1c2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95623-1https://doaj.org/toc/2045-2322Abstract Quantum technologies able to manipulating single quantum systems, are presently developing. Among the dowries of the quantum realm, entanglement is one of the basic resources for the novel quantum revolution. Within this context, one is faced with the problem of protecting the entanglement when a system state is manipulated. In this paper, we investigate the effect of the classical driving field on the generation entanglement between two qubits interacting with a bosonic environment. We discuss the effect of the classical field on the generation of entanglement between two (different) qubits and the conditions under which it has a constructive role in protecting the initial-state entanglement from decay induced by its environment. In particular, in the case of similar qubits, we locate a stationary sub-space of the system Hilbert space, characterized by states non depending on the environment properties as well as on the classical driving-field. Thus, we are able to determine the conditions to achieve maximally entangled stationary states after a transient interaction with the environment. We show that, overall, the classical driving field has a constructive role for the entanglement protection in the strong coupling regime. Also, we illustrate that a factorable initial-state can be driven in an entangled state and, even, in an entangled steady-state after the interaction with the environment.Alireza NourmandipourAzar VafafardAli MortezapourRoberto FranzosiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alireza Nourmandipour Azar Vafafard Ali Mortezapour Roberto Franzosi Entanglement protection of classically driven qubits in a lossy cavity
description	Abstract Quantum technologies able to manipulating single quantum systems, are presently developing. Among the dowries of the quantum realm, entanglement is one of the basic resources for the novel quantum revolution. Within this context, one is faced with the problem of protecting the entanglement when a system state is manipulated. In this paper, we investigate the effect of the classical driving field on the generation entanglement between two qubits interacting with a bosonic environment. We discuss the effect of the classical field on the generation of entanglement between two (different) qubits and the conditions under which it has a constructive role in protecting the initial-state entanglement from decay induced by its environment. In particular, in the case of similar qubits, we locate a stationary sub-space of the system Hilbert space, characterized by states non depending on the environment properties as well as on the classical driving-field. Thus, we are able to determine the conditions to achieve maximally entangled stationary states after a transient interaction with the environment. We show that, overall, the classical driving field has a constructive role for the entanglement protection in the strong coupling regime. Also, we illustrate that a factorable initial-state can be driven in an entangled state and, even, in an entangled steady-state after the interaction with the environment.
format	article
author	Alireza Nourmandipour Azar Vafafard Ali Mortezapour Roberto Franzosi
author_facet	Alireza Nourmandipour Azar Vafafard Ali Mortezapour Roberto Franzosi
author_sort	Alireza Nourmandipour
title	Entanglement protection of classically driven qubits in a lossy cavity
title_short	Entanglement protection of classically driven qubits in a lossy cavity
title_full	Entanglement protection of classically driven qubits in a lossy cavity
title_fullStr	Entanglement protection of classically driven qubits in a lossy cavity
title_full_unstemmed	Entanglement protection of classically driven qubits in a lossy cavity
title_sort	entanglement protection of classically driven qubits in a lossy cavity
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3ff22075f2324200841370690bd6ce1c
work_keys_str_mv	AT alirezanourmandipour entanglementprotectionofclassicallydrivenqubitsinalossycavity AT azarvafafard entanglementprotectionofclassicallydrivenqubitsinalossycavity AT alimortezapour entanglementprotectionofclassicallydrivenqubitsinalossycavity AT robertofranzosi entanglementprotectionofclassicallydrivenqubitsinalossycavity
_version_	1718383985830133760

Entanglement protection of classically driven qubits in a lossy cavity

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