Determining which quantum measurement performs better for state estimation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F15%3A33154637" target="_blank" >RIV/61989592:15310/15:33154637 - isvavai.cz</a>

Result on the web

<a href="http://journals.aps.org/pra/abstract/10.1103/PhysRevA.92.012108#fulltext" target="_blank" >http://journals.aps.org/pra/abstract/10.1103/PhysRevA.92.012108#fulltext</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevA.92.012108" target="_blank" >10.1103/PhysRevA.92.012108</a>

Result language

angličtina

Original language name

Determining which quantum measurement performs better for state estimation

Original language description

We introduce an operational and statistically meaningful measure, the quantum tomographic transfer function, that possesses important physical invariance properties for judging whether a given informationally complete quantum measurement performs bettertomographically in quantum-state estimation relative to other informationally complete measurements. This function is independent of the unknown true state of the quantum source and is directly related to the average optimal tomographic accuracy of an unbiased state estimator for the measurement in the limit of many sampling events. For the experimentally appealing minimally complete measurements, the transfer function is an extremely simple formula. We also give an explicit expression for this transferfunction in terms of an ordered expansion that is readily computable and illustrate its usage with numerical simulations and its consistency with some known results.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BH - Optics, masers and lasers

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review A

ISSN

1050-2947

e-ISSN

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Volume of the periodical

92

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

7

Pages from-to

"012108-1"-"012108-7"

UT code for WoS article

000357854100003

EID of the result in the Scopus database

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