Phase estimation in the presence of phase diffusion: The qubit case

Berihu Teklu; Marco G. Genoni; Stefano Olivares; Matteo G.A. Paris

doi:10.1088/0031-8949/2010/T140/014062

Phase estimation in the presence of phase diffusion: The qubit case

Berihu Teklu
, Marco G. Genoni
, Stefano Olivares
, Matteo G.A. Paris

Mathematics

Università degli Studi di Milano

Research output: Contribution to journal › Conference article › peer-review

35 Scopus citations

Abstract

In this paper we address the estimation of the phase shift imposed on a qubit in the presence of phase diffusion. We evaluate the ultimate quantum limits to precision and determine optimal probes and measurements achieving those bounds. We also analyse in detail the performances of spin measurements and have found that although the corresponding Fisher information depends on the unknown value of the phase shift, we may still achieve the ultimate bound using a two-step adaptive method.

Original language	British English
Article number	014062
Journal	Physica Scripta T
Volume	T140
DOIs	https://doi.org/10.1088/0031-8949/2010/T140/014062
State	Published - 2010
Event	16th Central European Workshop on Quantum Optics, CEWQO2009 - Turku, Finland Duration: 23 May 2009 → 27 May 2009

Access to Document

10.1088/0031-8949/2010/T140/014062

Cite this

@article{407d0cbba0cd440c8372668814694d13,

title = "Phase estimation in the presence of phase diffusion: The qubit case",

abstract = "In this paper we address the estimation of the phase shift imposed on a qubit in the presence of phase diffusion. We evaluate the ultimate quantum limits to precision and determine optimal probes and measurements achieving those bounds. We also analyse in detail the performances of spin measurements and have found that although the corresponding Fisher information depends on the unknown value of the phase shift, we may still achieve the ultimate bound using a two-step adaptive method.",

author = "Berihu Teklu and Genoni, \{Marco G.\} and Stefano Olivares and Paris, \{Matteo G.A.\}",

year = "2010",

doi = "10.1088/0031-8949/2010/T140/014062",

language = "British English",

volume = "T140",

journal = "Physica Scripta T",

issn = "0281-1847",

publisher = "Institute of Physics",

note = "16th Central European Workshop on Quantum Optics, CEWQO2009 ; Conference date: 23-05-2009 Through 27-05-2009",

}

TY - JOUR

T1 - Phase estimation in the presence of phase diffusion

T2 - 16th Central European Workshop on Quantum Optics, CEWQO2009

AU - Teklu, Berihu

AU - Genoni, Marco G.

AU - Olivares, Stefano

AU - Paris, Matteo G.A.

PY - 2010

Y1 - 2010

N2 - In this paper we address the estimation of the phase shift imposed on a qubit in the presence of phase diffusion. We evaluate the ultimate quantum limits to precision and determine optimal probes and measurements achieving those bounds. We also analyse in detail the performances of spin measurements and have found that although the corresponding Fisher information depends on the unknown value of the phase shift, we may still achieve the ultimate bound using a two-step adaptive method.

AB - In this paper we address the estimation of the phase shift imposed on a qubit in the presence of phase diffusion. We evaluate the ultimate quantum limits to precision and determine optimal probes and measurements achieving those bounds. We also analyse in detail the performances of spin measurements and have found that although the corresponding Fisher information depends on the unknown value of the phase shift, we may still achieve the ultimate bound using a two-step adaptive method.

UR - https://www.scopus.com/pages/publications/78650921248

U2 - 10.1088/0031-8949/2010/T140/014062

DO - 10.1088/0031-8949/2010/T140/014062

M3 - Conference article

AN - SCOPUS:78650921248

SN - 0281-1847

VL - T140

JO - Physica Scripta T

JF - Physica Scripta T

M1 - 014062

Y2 - 23 May 2009 through 27 May 2009

ER -

Phase estimation in the presence of phase diffusion: The qubit case

Abstract

Access to Document

Other files and links

Fingerprint

Cite this