Quantum phase estimation with squeezed quasi-Bell states

Souza, Douglas Delgado de; Vidiella-Barranco, A.

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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Quantum phase estimation with squeezed quasi-Bell states

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Author(s):	Souza, Douglas Delgado de ^[1] ; Vidiella-Barranco, A. ^[1] Total Authors: 2
Affiliation:	^[1] Univ Estadual Campinas, Gleb Wataghin Inst Phys, BR-13083859 Campinas, SP - Brazil Total Affiliations: 1
Document type:	Journal article
Source:	OPTIK; v. 244, OCT 2021.
Web of Science Citations:	0
Abstract
In this paper we present a study of the quantum phase estimation problem employing continuous-variable, entangled squeezed coherent (quasi-Bell) states as probe states. We show that their inherent squeezing and entanglement properties might bring advantages, increasing the precision of phase estimation compared to protocols which employ other continuous variable states e.g., two-mode, entangled coherent states or single-mode, squeezed states. We also analyze the phase estimation process considering: (i) a linear (unitary) perturbation, and (ii) dissipation, and conclude that the use of entangled squeezed coherent states as probe states may still be advantageous even under non-ideal conditions. (AU)

FAPESP's process:	08/57856-6 - National Institute of Science and Technology - Quantum Information
Grantee:	Amir Ordacgi Caldeira
Support Opportunities:	Research Projects - Thematic Grants

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