Determining which quantum measurement performs better for state estimation

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Determining which quantum measurement performs better for state estimation

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Determining which quantum measurement performs better for state estimation

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BH - Optika, masery a lasery

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Physical Review A

ISSN

1050-2947

e-ISSN

—

Svazek periodika

92

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

"012108-1"-"012108-7"

Kód UT WoS článku

000357854100003

EID výsledku v databázi Scopus

—