dc.contributor.author |
Martínez-Vargas, Esteban |
dc.contributor.author |
Pineda, Carlos |
dc.contributor.author |
Barberis-Blostein, Pablo |
dc.date |
2020 |
dc.identifier |
https://ddd.uab.cat/record/252660 |
dc.identifier |
urn:10.1038/s41598-020-65934-w |
dc.identifier |
urn:oai:ddd.uab.cat:252660 |
dc.identifier |
urn:pmcid:PMC7286896 |
dc.identifier |
urn:pmc-uid:7286896 |
dc.identifier |
urn:pmid:32523002 |
dc.identifier |
urn:oai:pubmedcentral.nih.gov:7286896 |
dc.identifier |
urn:articleid:20452322v10p9375 |
dc.format |
application/pdf |
dc.language |
eng |
dc.publisher |
|
dc.relation |
Ministerio de Economía y Competitividad FIS2016-80681-P |
dc.relation |
Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1127 |
dc.relation |
Scientific reports ; Vol. 10 (June 2020), art. 9375 |
dc.rights |
open access |
dc.rights |
Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
dc.rights |
https://creativecommons.org/licenses/by/4.0/ |
dc.subject |
Quantum metrology |
dc.subject |
Quantum information |
dc.title |
Quantum measurement optimization by decomposition of measurements into extremals |
dc.type |
Article |
dc.description.abstract |
Using the convex structure of positive operator value measurements and several quantities used in quantum metrology, such as quantum Fisher information or the quantum Van Trees information, we present an efficient numerical method to find the best strategy allowed by quantum mechanics to estimate a parameter. This method explores extremal measurements thus providing a significant advantage over previously used methods. We exemplify the method for different cost functions in a qubit and in a harmonic oscillator and find a strong numerical advantage when the desired target error is sufficiently small. |