{"id":"https://openalex.org/W7204229237","doi":"https://doi.org/10.48550/arxiv.2608.24433","title":"Gaussian process reconstruction of scalar field dynamics from recent cosmological data","display_name":"Gaussian process reconstruction of scalar field dynamics from recent cosmological data","publication_year":2026,"publication_date":"2026-08-25","ids":{"openalex":"https://openalex.org/W7204229237","doi":"https://doi.org/10.48550/arxiv.2608.24433"},"language":"en","primary_location":{"id":"pmh:oai:arXiv.org:2608.24433","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2608.24433","pdf_url":"https://arxiv.org/pdf/2608.24433","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"parent_works":[],"lineage":["https://openalex.org/W7204229237"],"child_works_count":0,"type":"preprint","is_traditional":true,"indexed_in":["arxiv","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2608.24433","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5093393150","display_name":"Afaq Maqsood","orcid":"https://orcid.org/0009-0000-3084-9169","observed_orcids":["https://orcid.org/0009-0000-3084-9169"]},"institutions":[{"id":"https://openalex.org/I59475050","display_name":"Jamia Millia Islamia","ror":"https://ror.org/00pnhhv55","country_code":"IN","type":"education","lineage":["https://openalex.org/I59475050"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"Maqsood, Afaq","raw_affiliation_strings":["Department of Physics , Jamia Millia Islamia , New Delhi , 110025 , India"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics , Jamia Millia Islamia , New Delhi , 110025 , India","institution_ids":["https://openalex.org/I59475050"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101313927","display_name":"Sonej Alam","orcid":"https://orcid.org/0009-0008-8322-2923","observed_orcids":["https://orcid.org/0009-0008-8322-2923"]},"institutions":[{"id":"https://openalex.org/I59475050","display_name":"Jamia Millia Islamia","ror":"https://ror.org/00pnhhv55","country_code":"IN","type":"education","lineage":["https://openalex.org/I59475050"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"Alam, Sonej","raw_affiliation_strings":["Department of Physics , Jamia Millia Islamia , New Delhi , 110025 , India"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics , Jamia Millia Islamia , New Delhi , 110025 , India","institution_ids":["https://openalex.org/I59475050"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5124949511","display_name":"Md. Wali Hossain","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Hossain, Md. Wali","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10095","display_name":"Cosmology and Gravitation Theories","score":0.9984999895095825,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10095","display_name":"Cosmology and Gravitation Theories","score":0.9984999895095825,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11090","display_name":"Dark Matter and Cosmic Phenomena","score":0.00019999999494757503,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10026","display_name":"Galaxies: Formation, Evolution, Phenomena","score":9.999999747378752e-05,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/dark-energy","display_name":"dark energy","score":0.8820000290870667},{"id":"https://openalex.org/keywords/scalar-field-reconstruction","display_name":"scalar field reconstruction","score":0.8119999766349792},{"id":"https://openalex.org/keywords/gaussian-process-regression","display_name":"Gaussian process regression","score":0.781000018119812},{"id":"https://openalex.org/keywords/cosmic-chronometers","display_name":"cosmic chronometers","score":0.9160000085830688},{"id":"https://openalex.org/keywords/baryon-acoustic-oscillations","display_name":"baryon acoustic oscillations","score":0.9580000042915344},{"id":"https://openalex.org/keywords/type-ia-supernovae","display_name":"Type Ia supernovae","score":0.9950000047683716},{"id":"https://openalex.org/keywords/hubble-parameter","display_name":"Hubble parameter","score":0.8119999766349792},{"id":"https://openalex.org/keywords/equation-of-state","display_name":"equation of state","score":0.7730000019073486},{"id":"https://openalex.org/keywords/phantom-divide-crossing","display_name":"phantom crossing","score":0.9419999718666077},{"id":"https://openalex.org/keywords/scalar-field-potential","display_name":"scalar field potential","score":0.7900000214576721},{"id":"https://openalex.org/keywords/spatial-curvature","display_name":"spatial curvature","score":0.5090000033378601},{"id":"https://openalex.org/keywords/cosmic-expansion-history","display_name":"cosmic expansion history","score":0.5529999732971191}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.8320000171661377},{"id":"https://openalex.org/C172790937","wikidata":"https://www.wikidata.org/wiki/Q18343","display_name":"Dark energy","level":3,"score":0.7376999855041504},{"id":"https://openalex.org/C110521144","wikidata":"https://www.wikidata.org/wiki/Q193460","display_name":"Scalar field","level":2,"score":0.6437000036239624},{"id":"https://openalex.org/C207297109","wikidata":"https://www.wikidata.org/wiki/Q15605","display_name":"Cosmic microwave background","level":3,"score":0.5641000270843506},{"id":"https://openalex.org/C103874350","wikidata":"https://www.wikidata.org/wiki/Q179916","display_name":"Hubble's law","level":4,"score":0.515999972820282},{"id":"https://openalex.org/C2778086583","wikidata":"https://www.wikidata.org/wiki/Q3363554","display_name":"Deceleration parameter","level":4,"score":0.5138000249862671},{"id":"https://openalex.org/C195065555","wikidata":"https://www.wikidata.org/wiki/Q214881","display_name":"Curvature","level":2,"score":0.5102999806404114},{"id":"https://openalex.org/C24872484","wikidata":"https://www.wikidata.org/wiki/Q126818","display_name":"Dimensionless quantity","level":2,"score":0.5077999830245972},{"id":"https://openalex.org/C57691317","wikidata":"https://www.wikidata.org/wiki/Q1289248","display_name":"Scalar (mathematics)","level":2,"score":0.45089998841285706},{"id":"https://openalex.org/C163716315","wikidata":"https://www.wikidata.org/wiki/Q901177","display_name":"Gaussian","level":2,"score":0.4122999906539917},{"id":"https://openalex.org/C53810900","wikidata":"https://www.wikidata.org/wiki/Q214967","display_name":"Equation of state","level":2,"score":0.39750000834465027},{"id":"https://openalex.org/C135889238","wikidata":"https://www.wikidata.org/wiki/Q46276","display_name":"Kinetic energy","level":2,"score":0.38839998841285706},{"id":"https://openalex.org/C31836371","wikidata":"https://www.wikidata.org/wiki/Q1856609","display_name":"Scalar potential","level":2,"score":0.3856000006198883},{"id":"https://openalex.org/C2779228454","wikidata":"https://www.wikidata.org/wiki/Q6410802","display_name":"Kinetic term","level":3,"score":0.3723999857902527},{"id":"https://openalex.org/C61326573","wikidata":"https://www.wikidata.org/wiki/Q1496376","display_name":"Gaussian process","level":3,"score":0.3695000112056732},{"id":"https://openalex.org/C74650414","wikidata":"https://www.wikidata.org/wiki/Q11397","display_name":"Classical mechanics","level":1,"score":0.34950000047683716},{"id":"https://openalex.org/C121864883","wikidata":"https://www.wikidata.org/wiki/Q677916","display_name":"Statistical physics","level":1,"score":0.3425999879837036},{"id":"https://openalex.org/C166861157","wikidata":"https://www.wikidata.org/wiki/Q59151","display_name":"Cosmological constant","level":2,"score":0.3418000042438507},{"id":"https://openalex.org/C9652623","wikidata":"https://www.wikidata.org/wiki/Q190109","display_name":"Field (mathematics)","level":2,"score":0.34040001034736633},{"id":"https://openalex.org/C2778439541","wikidata":"https://www.wikidata.org/wiki/Q7106412","display_name":"Oscillation (cell signaling)","level":2,"score":0.3278000056743622},{"id":"https://openalex.org/C127592171","wikidata":"https://www.wikidata.org/wiki/Q3937","display_name":"Supernova","level":2,"score":0.3167000114917755},{"id":"https://openalex.org/C152321242","wikidata":"https://www.wikidata.org/wiki/Q7048759","display_name":"Non-Gaussianity","level":4,"score":0.2842000126838684},{"id":"https://openalex.org/C72838231","wikidata":"https://www.wikidata.org/wiki/Q809676","display_name":"Baryon acoustic oscillations","level":4,"score":0.27790001034736633},{"id":"https://openalex.org/C33332235","wikidata":"https://www.wikidata.org/wiki/Q18362","display_name":"Theoretical physics","level":1,"score":0.27559998631477356},{"id":"https://openalex.org/C62796785","wikidata":"https://www.wikidata.org/wiki/Q12902765","display_name":"Cosmic background radiation","level":4,"score":0.2696000039577484},{"id":"https://openalex.org/C91188154","wikidata":"https://www.wikidata.org/wiki/Q186247","display_name":"Vector field","level":2,"score":0.2549000084400177}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:arXiv.org:2608.24433","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2608.24433","pdf_url":"https://arxiv.org/pdf/2608.24433","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"doi:10.48550/arxiv.2608.24433","doi":"https://doi.org/10.48550/arxiv.2608.24433","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2608.24433","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:2608.24433","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2608.24433","pdf_url":"https://arxiv.org/pdf/2608.24433","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7204229237.pdf","grobid_xml":"https://content.openalex.org/works/W7204229237.grobid-xml"},"referenced_works_count":83,"referenced_works":["https://openalex.org/W1549112826","https://openalex.org/W1800569184","https://openalex.org/W1853767801","https://openalex.org/W1983233159","https://openalex.org/W1992720874","https://openalex.org/W2008290794","https://openalex.org/W2012347629","https://openalex.org/W2016905818","https://openalex.org/W2023875957","https://openalex.org/W2029744870","https://openalex.org/W2030810698","https://openalex.org/W2032901690","https://openalex.org/W2040265350","https://openalex.org/W2050573442","https://openalex.org/W2057645607","https://openalex.org/W2062486616","https://openalex.org/W2067997899","https://openalex.org/W2073832139","https://openalex.org/W2082443206","https://openalex.org/W2101149392","https://openalex.org/W2117797710","https://openalex.org/W2131279590","https://openalex.org/W2139937287","https://openalex.org/W2140950522","https://openalex.org/W2157927519","https://openalex.org/W2169940553","https://openalex.org/W2501864044","https://openalex.org/W2591817099","https://openalex.org/W2743081451","https://openalex.org/W2763117186","https://openalex.org/W2771541924","https://openalex.org/W2774479343","https://openalex.org/W2783721090","https://openalex.org/W2887785509","https://openalex.org/W3012419803","https://openalex.org/W4220857879","https://openalex.org/W4282961335","https://openalex.org/W4286702585","https://openalex.org/W4309127764","https://openalex.org/W4312052547","https://openalex.org/W4379107751","https://openalex.org/W4386121961","https://openalex.org/W4389115081","https://openalex.org/W4390861771","https://openalex.org/W4394029306","https://openalex.org/W4394029502","https://openalex.org/W4396770193","https://openalex.org/W4396814619","https://openalex.org/W4398795682","https://openalex.org/W4401769291","https://openalex.org/W4402048698","https://openalex.org/W4403066672","https://openalex.org/W4404565518","https://openalex.org/W4404920361","https://openalex.org/W4405642220","https://openalex.org/W4409246663","https://openalex.org/W4409293301","https://openalex.org/W4410397391","https://openalex.org/W4410636511","https://openalex.org/W4411723237","https://openalex.org/W4412364919","https://openalex.org/W4412402872","https://openalex.org/W4414195782","https://openalex.org/W4414490184","https://openalex.org/W4414768379","https://openalex.org/W4414860884","https://openalex.org/W4414969836","https://openalex.org/W4414990124","https://openalex.org/W4415376854","https://openalex.org/W4415791327","https://openalex.org/W4416245901","https://openalex.org/W4417277132","https://openalex.org/W6910464191","https://openalex.org/W7107879002","https://openalex.org/W7125199000","https://openalex.org/W7128776776","https://openalex.org/W7135419180","https://openalex.org/W7154143063","https://openalex.org/W7155171908","https://openalex.org/W7162452364","https://openalex.org/W7162667434","https://openalex.org/W7168426430","https://openalex.org/W7204905937"],"related_works":["https://openalex.org/W7151316812","https://openalex.org/W7168247915","https://openalex.org/W4401769291","https://openalex.org/W4309127764","https://openalex.org/W2082443206","https://openalex.org/W2805372341","https://openalex.org/W3165313306","https://openalex.org/W7171486381","https://openalex.org/W7128495187","https://openalex.org/W7155171908"],"abstract_inverted_index":{"We":[0,14],"reconstruct":[1],"the":[2,75,84,92,98,104,123,147,172,210,241,248],"late-time":[3],"expansion":[4,211],"history":[5],"and":[6,66,69,79,88,97,152,175,221,245],"dark":[7,16],"energy":[8,17,90],"dynamics":[9],"using":[10],"available":[11],"cosmological":[12],"data.":[13,185],"consider":[15],"as":[18,179],"an":[19],"effective":[20],"minimally":[21],"coupled":[22],"canonical":[23],"scalar":[24,85,105],"field":[25,86,106],"without":[26],"assuming":[27],"a":[28,43,157,162,180],"specific":[29],"form":[30],"for":[31],"its":[32,80,204,233],"potential.":[33,107],"For":[34],"reconstruction,":[35],"we":[36,82,155,229],"use":[37],"Gaussian":[38],"Process":[39],"(GP)":[40],"regression":[41],"with":[42,117,183,193],"joint":[44],"dataset":[45],"consisting":[46],"of":[47,94,103,161,209],"32":[48],"cosmic":[49],"chronometer":[50],"measurements":[51],"(CC32),":[52],"DESI":[53,153],"DR2":[54],"baryon":[55],"acoustic":[56],"oscillation":[57],"data,":[58],"three":[59],"Type":[60],"Ia":[61],"supernova":[62,173],"compilations":[63],"(Pantheon+,":[64],"Union3,":[65],"DES":[67],"Y5),":[68],"compressed":[70],"CMB":[71],"distance":[72],"priors.":[73],"From":[74],"reconstructed":[76,109],"Hubble":[77],"parameter":[78,101,188,215],"derivatives,":[81],"obtain":[83],"kinetic":[87,130],"potential":[89,110],"densities,":[91],"equation":[93],"state":[95],"$w(z)$,":[96],"dimensionless":[99],"slope":[100,187],"$|\u03bb(z)|$":[102,189],"The":[108,129,186,213],"is":[111,222],"nearly":[112],"constant":[113],"at":[114],"late":[115],"times,":[116],"$\\tilde{V}(0)":[118],"\\simeq":[119],"0.68$--$0.70\u03c1_{c,0}$,":[120],"close":[121,143],"to":[122,144,203],"dark-energy":[124],"density":[125],"in":[126],"flat":[127],"$\u039b$CDM.":[128],"term":[131],"remains":[132,142,246],"small":[133,236],"over":[134],"$0":[135],"\\lesssim":[136,138],"z":[137],"2.5$,":[139],"while":[140],"$w(z)$":[141],"$-1$":[145],"within":[146,247],"uncertainties.":[148],"Using":[149],"only":[150,243],"CC32":[151],"DR2,":[154],"find":[156],"mild":[158,191],"($1\u03c3$)":[159],"hint":[160],"phantom-divide":[163],"crossing":[164],"near":[165],"$z\\sim0.5$.":[166],"However,":[167],"this":[168],"feature":[169],"depends":[170],"on":[171,206],"compilation":[174],"cannot":[176],"be":[177],"regarded":[178],"firm":[181],"conclusion":[182],"current":[184,226],"shows":[190],"evolution,":[192],"present-day":[194],"central":[195],"values":[196],"around":[197],"$0.8$--$1.0$,":[198],"but":[199],"large":[200],"uncertainties":[201],"due":[202],"dependence":[205],"higher-order":[207,219],"derivatives":[208,220],"history.":[212],"curvature":[214],"$\u0393(z)$":[216],"requires":[217],"even":[218],"not":[223,231],"constrained":[224],"by":[225],"data;":[227],"therefore,":[228],"do":[230],"report":[232],"reconstruction.":[234],"Allowing":[235],"spatial":[237],"curvature,":[238],"$\u03a9_k=0$--$0.02$,":[239],"changes":[240],"results":[242],"slightly":[244],"existing":[249],"uncertainty":[250],"bands.":[251]},"counts_by_year":[],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2026-08-27T00:00:00"}
