Computing the Graph-Changing Dynamics of Loop Quantum Gravity

This article belongs to the Special Issue Celebrating the 110th Anniversary of General Relativity: Advances, Challenges and Perspectives

Detalles Bibliográficos
Autores: Guedes, Thiago L. M., Mena Marugán, Guillermo A., Vidotto, Francesca, Müller, Markus
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/408528
Acceso en línea:http://hdl.handle.net/10261/408528
Access Level:acceso abierto
Palabra clave:Loop quantum gravity
Canonical general relativity
Hamiltonian constraint
Challenges in gravitational physics
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spelling Computing the Graph-Changing Dynamics of Loop Quantum GravityGuedes, Thiago L. M.Mena Marugán, Guillermo A.Vidotto, FrancescaMüller, MarkusLoop quantum gravityCanonical general relativityHamiltonian constraintChallenges in gravitational physicsThis article belongs to the Special Issue Celebrating the 110th Anniversary of General Relativity: Advances, Challenges and PerspectivesIn loop quantum gravity (LQG), states of the gravitational field are represented by labeled graphs called spin networks. Their dynamics can be described by a Hamiltonian constraint, which acts on the spin network states, modifying both spins and graphs. Fixed-graph approximations of the dynamics have been extensively studied, but its full graph-changing action so far remains elusive. The latter, alongside the solutions of its constraint, are arguably the missing features in canonical LQG to access phenomenology in all its richness. Here, we discuss a recently developed numerical tool that, for the first time, implements graph-changing dynamics via the Hamiltonian constraint. We explain how it is used to find new solutions to that constraint and to show that some quantum geometric observables behave differently than in the graph-preserving truncation. We also point out that these new numerical methods can find applications in other domains.FV’s research has been partially supported by the Canada Research Chairs Program and the Natural Science and Engineering Council of Canada (NSERC) through the Discovery Grant “Loop Quantum Gravity: from Computation to Phenomenology”. She has also been supported by the ID# 62312 grant from the John Templeton Foundation, as part of the project “The Quantum Information Structure of Spacetime” (QISS). TLMG and MM acknowledge support by the ERC Starting Grant QNets through Grant No. 804247, and the EU’s Horizon Europe research and innovation program under Grant Agreement No. 101114305 (“MILLENION-SGA1” EU Project) and under Grant Agreement No. 101046968 (BRISQ). MM furthermore acknowledges support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy “Cluster of Excellence Matter and Light for Quantum Computing (ML4Q) EXC 2004/1” 390534769. This research is part of the Munich Quantum Valley (K-8), supported by the Bavarian state government with funds from the Hightech Agenda Bayern Plus. GAMM acknowledges support by MCIU/AEI/10.13019/501100011033 and FSE+ under the Grant No. PID2023-149018NB-C41.Peer reviewedMultidisciplinary Digital Publishing InstituteCanada Research ChairsNatural Sciences and Engineering Research Council of CanadaJohn Templeton FoundationEuropean CommissionGerman Research FoundationFree State of BavariaMinisterio de Ciencia, Innovación y Universidades (España)Agencia Estatal de Investigación (España)Guedes, Thiago L. M. [0000-0003-3281-145X]Mena Marugán, Guillermo A. [0000-0003-3378-9610]Vidotto, Francesca [0000-0002-9883-0808]Müller, Markus [0000-0002-2813-3097]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2025202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/408528reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/804247info:eu-repo/grantAgreement/EC/HE/101114305info:eu-rep/grantAgreement/EC/HE/101046968info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-149018NB-C41https://doi.org/10.3390/universe11120387Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4085282026-05-22T06:33:51Z
dc.title.none.fl_str_mv Computing the Graph-Changing Dynamics of Loop Quantum Gravity
title Computing the Graph-Changing Dynamics of Loop Quantum Gravity
spellingShingle Computing the Graph-Changing Dynamics of Loop Quantum Gravity
Guedes, Thiago L. M.
Loop quantum gravity
Canonical general relativity
Hamiltonian constraint
Challenges in gravitational physics
title_short Computing the Graph-Changing Dynamics of Loop Quantum Gravity
title_full Computing the Graph-Changing Dynamics of Loop Quantum Gravity
title_fullStr Computing the Graph-Changing Dynamics of Loop Quantum Gravity
title_full_unstemmed Computing the Graph-Changing Dynamics of Loop Quantum Gravity
title_sort Computing the Graph-Changing Dynamics of Loop Quantum Gravity
dc.creator.none.fl_str_mv Guedes, Thiago L. M.
Mena Marugán, Guillermo A.
Vidotto, Francesca
Müller, Markus
author Guedes, Thiago L. M.
author_facet Guedes, Thiago L. M.
Mena Marugán, Guillermo A.
Vidotto, Francesca
Müller, Markus
author_role author
author2 Mena Marugán, Guillermo A.
Vidotto, Francesca
Müller, Markus
author2_role author
author
author
dc.contributor.none.fl_str_mv Canada Research Chairs
Natural Sciences and Engineering Research Council of Canada
John Templeton Foundation
European Commission
German Research Foundation
Free State of Bavaria
Ministerio de Ciencia, Innovación y Universidades (España)
Agencia Estatal de Investigación (España)
Guedes, Thiago L. M. [0000-0003-3281-145X]
Mena Marugán, Guillermo A. [0000-0003-3378-9610]
Vidotto, Francesca [0000-0002-9883-0808]
Müller, Markus [0000-0002-2813-3097]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Loop quantum gravity
Canonical general relativity
Hamiltonian constraint
Challenges in gravitational physics
topic Loop quantum gravity
Canonical general relativity
Hamiltonian constraint
Challenges in gravitational physics
description This article belongs to the Special Issue Celebrating the 110th Anniversary of General Relativity: Advances, Challenges and Perspectives
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
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dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/408528
url http://hdl.handle.net/10261/408528
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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info:eu-repo/grantAgreement/EC/H2020/804247
info:eu-repo/grantAgreement/EC/HE/101114305
info:eu-rep/grantAgreement/EC/HE/101046968
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-149018NB-C41
https://doi.org/10.3390/universe11120387
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
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collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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