Entanglement protection of classically driven qubits in a lossy cavity

Year: 2021

Authors: Nourmandipour A., Vafafard A., MortezapourA., Franzosi R.

Autors Affiliation: Sirjan Univ Technol, Dept Phys, Sirjan 7813733385, Iran; Ist Nazl Ottica, QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy; Ist Nazl Ottica, CNR, Largo Enrico Fermi 2, I-50125 Florence, Italy; Univ Guilan, Dept Phys, POB 41335-1914, Rasht, Iran.

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.

Journal/Review: SCIENTIFIC REPORTS

Volume: 11 (1)      Pages from: 16259  to: 16259-13

More Information: A.N., A.V. and R.F. acknowledge support by the QuantERA ERA-NET Co-fund 731473 (Project Q-CLOCKS). R. F. acknowledges support by National Group of Mathematical Physics (GNFM-INdAM).
KeyWords: Quantum entanglement, Atoms cavity dynamics
DOI: 10.1038/s41598-021-95623-1

ImpactFactor: 4.996
Citations: 20
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-24
References taken from IsiWeb of Knowledge: (subscribers only)

Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here