We address a phase estimation scheme using Gaussian states in the presence of non-Gaussian phase noise. At variance with previous analysis, we analyze situations in which the noise occurs before encoding phase information. In particular, we study how squeezing may be profitably used before or after phase diffusion. Our results show that squeezing the probe after the noise greatly enhances the sensitivity of the estimation scheme, as witnessed by the increase of the quantum Fisher information. We then consider a realistic setup in which homodyne detection is employed at the measurement stage, and we address its optimality as well as its performance in the two different scenarios.
Squeezing as a resource to counteract phase diffusion in optical phase estimation / G. Carrara, M.G. Genoni, S. Cialdi, M.G.A. Paris, S. Olivares. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 102:6(2020 Dec 16), pp. 062610.062610-1-062610.062610-7.
Titolo: | Squeezing as a resource to counteract phase diffusion in optical phase estimation |
Autori: | GENONI, MARCO GIOVANNI (Secondo) PARIS, MATTEO (Penultimo) OLIVARES, STEFANO (Ultimo) (Corresponding) |
Settore Scientifico Disciplinare: | Settore FIS/03 - Fisica della Materia |
Progetto: | PIANO DI SOSTEGNO ALLA RICERCA 2015-2017 - LINEA 2 "DOTAZIONE ANNUALE PER ATTIVITA' ISTITUZIONALE" |
Data di pubblicazione: | 16-dic-2020 |
Rivista: | |
Tipologia: | Article (author) |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevA.102.062610 |
Appare nelle tipologie: | 01 - Articolo su periodico |
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