Publication:
Critical quantum metrology in fully-connected models: From Heisenberg to Kibble-Zurek scaling

Simple item page
dc.affiliation.dptoUC3M. Departamento de Físicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: QUEST: Quantum Engineering, Science and Technologyes
dc.contributor.authorGarbe, Louis
dc.contributor.authorAbah, Obinna
dc.contributor.authorFelicetti, Simone
dc.contributor.authorPuebla Antunes, Ricardo
dc.contributor.funderEuropean Commissionen
dc.date.accessioned2024-02-01T15:18:24Z
dc.date.available2024-02-01T15:18:24Z
dc.date.issued2022-07-01
dc.description.abstractPhase transitions represent a compelling tool for classical and quantum sensing applications. It has been demonstrated that quantum sensors can in principle saturate the Heisenberg scaling, the ultimate precision bound allowed by quantum mechanics, in the limit of large probe number and long measurement time. Due to the critical slowing down, the protocol duration time is of utmost relevance in critical quantum metrology. However, how the long-time limit is reached remains in general an open question. So far, only two dichotomic approaches have been considered, based on either static or dynamical properties of critical quantum systems. Here, we provide a comprehensive analysis of the scaling of the quantum Fisher information for different families of protocols that create a continuous connection between static and dynamical approaches. In particular, we consider fully-connected models, a broad class of quantum critical systems of high experimental relevance. Our analysis unveils the existence of universal precision-scaling regimes. These regimes remain valid even for finite-time protocols and finite-size systems. We also frame these results in a general theoretical perspective, by deriving a precision bound for arbitrary time-dependent quadratic Hamiltonians.en
dc.description.sponsorshipThis work was supported by the Austrian Academy of Sciences (ÖAW) and by the Austrian Science Fund (FWF) through Grant No. P32299 (PHONED). RP acknowledges support from the European Union's Horizon 2020 FET-Open Project SuperQuLAN (899354). OA acknowledges support from the UK EPSRC EP/S02994X/1 and Newcastle University (Newcastle University Academic Track fellowship).en
dc.format.extent41es
dc.identifier.bibliographicCitationGarbe, L., Abah, O., Felicetti, S., & Puebla, R. (2022). Critical quantum metrology with fully-connected models: from Heisenberg to Kibble–Zurek scaling. Quantum science and technology, 7(3), 035010.en
dc.identifier.doihttps://doi.org/10.1088/2058-9565/ac6ca5
dc.identifier.issn2058-9565
dc.identifier.publicationfirstpage1es
dc.identifier.publicationissue3es
dc.identifier.publicationlastpage41es
dc.identifier.publicationtitleQuantum Science and Technologyen
dc.identifier.publicationvolume7es
dc.identifier.urihttps://hdl.handle.net/10016/39756
dc.identifier.uxxiAR/0000030982
dc.language.isoengen
dc.publisherIOP Publishingen
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/899354/SuperQuLANen
dc.rights© 2022 The Author(s). Published by IOP Publishing Ltden
dc.rightsOriginal content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.en
dc.rightsAtribución 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subject.ecienciaFísicaes
dc.subject.otherQuantum metrologyen
dc.subject.otherQuantum phase transitionses
dc.subject.otherQuantum critical phenomenaen
dc.subject.otherKibble-Zurek mechanismen
dc.subject.otherFully-connected modelsen
dc.titleCritical quantum metrology in fully-connected models: From Heisenberg to Kibble-Zurek scalingen
dc.typeresearch articleen
dc.type.hasVersionVoRen
dspace.entity.typePublication
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
critical_QST_2022.pdf
Size:
4.61 MB
Format:
Adobe Portable Document Format
Download
Collections
Artículos de Investigación
OpenAIRE: Open Access Infrastructure for Research in Europe