{"id":"https://openalex.org/W7225464468","doi":"https://doi.org/10.5281/zenodo.24035910","title":"Fisher Matrix Forecasts for the SV0 Dark Energy Model: Distinguishing Structural and Phenomenological Phantom Crossings in the Stage-IV Era (Preprint)","display_name":"Fisher Matrix Forecasts for the SV0 Dark Energy Model: Distinguishing Structural and Phenomenological Phantom Crossings in the Stage-IV Era (Preprint)","publication_year":2026,"publication_date":"2026-11-07","ids":{"openalex":"https://openalex.org/W7225464468","doi":"https://doi.org/10.5281/zenodo.24035910"},"language":"en","primary_location":{"id":"doi:10.5281/zenodo.24035910","doi":"https://doi.org/10.5281/zenodo.24035910","is_oa":true,"landing_page_url":"https://doi.org/10.5281/zenodo.24035910","pdf_url":null,"source":{"id":"https://openalex.org/S4306400562","display_name":"Zenodo (CERN European Organization for Nuclear Research)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I67311998","host_organization_name":"European Organization for Nuclear Research","host_organization_lineage":["https://openalex.org/I67311998"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"},"volume":null,"type":"preprint","is_traditional":true,"indexed_in":["datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://doi.org/10.5281/zenodo.24035910","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5152384891","display_name":"M. Uditha Sandaruwan","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Sandaruwan, M. Uditha","raw_affiliation_strings":[],"raw_orcid":"https://orcid.org/0009-0006-4909-4505","affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":["https://openalex.org/A5152384891"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"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":0.9990000128746033,"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":0.9990000128746033,"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":0.0003000000142492354,"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/phantom-divide-crossing","display_name":"phantom crossing","score":0.8949999809265137},{"id":"https://openalex.org/keywords/cpl-parameterization","display_name":"CPL parametrization","score":0.7400000095367432},{"id":"https://openalex.org/keywords/fisher-matrix-forecast","display_name":"Fisher forecast","score":0.5860000252723694},{"id":"https://openalex.org/keywords/desi-dr3","display_name":"DESI DR3","score":0.8109999895095825},{"id":"https://openalex.org/keywords/euclid","display_name":"Euclid","score":0.972000002861023},{"id":"https://openalex.org/keywords/rubin-observatory","display_name":"Rubin Observatory","score":0.9700000286102295},{"id":"https://openalex.org/keywords/hubble-parameter","display_name":"Hubble parameter","score":0.703000009059906},{"id":"https://openalex.org/keywords/angular-diameter-distance","display_name":"angular diameter distance","score":0.9950000047683716},{"id":"https://openalex.org/keywords/effective-fluid","display_name":"effective fluid","score":0.6840000152587891},{"id":"https://openalex.org/keywords/dark-energy-constraints","display_name":"dark energy constraints","score":0.5860000252723694},{"id":"https://openalex.org/keywords/cosmological-perturbations","display_name":"cosmological perturbations","score":0.699999988079071},{"id":"https://openalex.org/keywords/gauge-invariance","display_name":"gauge invariance","score":0.5899999737739563},{"id":"https://openalex.org/keywords/dynamical-systems-analysis","display_name":"dynamical systems analysis","score":0.6549999713897705}],"concepts":[{"id":"https://openalex.org/C172790937","wikidata":"https://www.wikidata.org/wiki/Q18343","display_name":"Dark energy","level":3,"score":0.9021000266075134},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.7050999999046326},{"id":"https://openalex.org/C104293457","wikidata":"https://www.wikidata.org/wiki/Q28324852","display_name":"Imaging phantom","level":2,"score":0.6514999866485596},{"id":"https://openalex.org/C33024259","wikidata":"https://www.wikidata.org/wiki/Q76250","display_name":"Redshift","level":3,"score":0.6133999824523926},{"id":"https://openalex.org/C121864883","wikidata":"https://www.wikidata.org/wiki/Q677916","display_name":"Statistical physics","level":1,"score":0.45260000228881836},{"id":"https://openalex.org/C26405456","wikidata":"https://www.wikidata.org/wiki/Q338","display_name":"Cosmology","level":2,"score":0.4212000072002411},{"id":"https://openalex.org/C207390915","wikidata":"https://www.wikidata.org/wiki/Q1230525","display_name":"Divergence (linguistics)","level":2,"score":0.37299999594688416},{"id":"https://openalex.org/C186370098","wikidata":"https://www.wikidata.org/wiki/Q442787","display_name":"Energy (signal processing)","level":2,"score":0.3695000112056732},{"id":"https://openalex.org/C519991488","wikidata":"https://www.wikidata.org/wiki/Q28865","display_name":"Python (programming language)","level":2,"score":0.3598000109195709},{"id":"https://openalex.org/C106487976","wikidata":"https://www.wikidata.org/wiki/Q685816","display_name":"Matrix (chemical analysis)","level":2,"score":0.3547999858856201},{"id":"https://openalex.org/C202887219","wikidata":"https://www.wikidata.org/wiki/Q3895221","display_name":"Parametrization (atmospheric modeling)","level":3,"score":0.3393999934196472},{"id":"https://openalex.org/C33332235","wikidata":"https://www.wikidata.org/wiki/Q18362","display_name":"Theoretical physics","level":1,"score":0.31949999928474426},{"id":"https://openalex.org/C56764","wikidata":"https://www.wikidata.org/wiki/Q2998314","display_name":"Observational cosmology","level":4,"score":0.30970001220703125},{"id":"https://openalex.org/C117251300","wikidata":"https://www.wikidata.org/wiki/Q1849855","display_name":"Parametric statistics","level":2,"score":0.3003000020980835},{"id":"https://openalex.org/C29406490","wikidata":"https://www.wikidata.org/wiki/Q1420659","display_name":"Fisher information","level":2,"score":0.29409998655319214},{"id":"https://openalex.org/C103874350","wikidata":"https://www.wikidata.org/wiki/Q179916","display_name":"Hubble's law","level":4,"score":0.2858999967575073},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.2847999930381775},{"id":"https://openalex.org/C119043178","wikidata":"https://www.wikidata.org/wiki/Q320723","display_name":"Covariate","level":2,"score":0.2718999981880188},{"id":"https://openalex.org/C109214941","wikidata":"https://www.wikidata.org/wiki/Q18334","display_name":"Particle physics","level":1,"score":0.26930001378059387},{"id":"https://openalex.org/C45374587","wikidata":"https://www.wikidata.org/wiki/Q12525525","display_name":"Computation","level":2,"score":0.2630000114440918},{"id":"https://openalex.org/C24574437","wikidata":"https://www.wikidata.org/wiki/Q7135228","display_name":"Parametric model","level":3,"score":0.26080000400543213},{"id":"https://openalex.org/C2778022998","wikidata":"https://www.wikidata.org/wiki/Q651136","display_name":"Transit (satellite)","level":3,"score":0.2542000114917755},{"id":"https://openalex.org/C190470478","wikidata":"https://www.wikidata.org/wiki/Q2370229","display_name":"Invariant (physics)","level":2,"score":0.2508000135421753},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.2500999867916107}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.5281/zenodo.24035910","doi":"https://doi.org/10.5281/zenodo.24035910","is_oa":true,"landing_page_url":"https://doi.org/10.5281/zenodo.24035910","pdf_url":null,"source":{"id":"https://openalex.org/S4306400562","display_name":"Zenodo (CERN European Organization for Nuclear Research)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I67311998","host_organization_name":"European Organization for Nuclear Research","host_organization_lineage":["https://openalex.org/I67311998"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"},{"id":"doi:10.5281/zenodo.24035911","doi":"https://doi.org/10.5281/zenodo.24035911","is_oa":true,"landing_page_url":"https://doi.org/10.5281/zenodo.24035911","pdf_url":null,"source":{"id":"https://openalex.org/S4306400562","display_name":"Zenodo (CERN European Organization for Nuclear Research)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I67311998","host_organization_name":"European Organization for Nuclear Research","host_organization_lineage":["https://openalex.org/I67311998"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"doi:10.5281/zenodo.24035910","doi":"https://doi.org/10.5281/zenodo.24035910","is_oa":true,"landing_page_url":"https://doi.org/10.5281/zenodo.24035910","pdf_url":null,"source":{"id":"https://openalex.org/S4306400562","display_name":"Zenodo (CERN European Organization for Nuclear Research)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I67311998","host_organization_name":"European Organization for Nuclear Research","host_organization_lineage":["https://openalex.org/I67311998"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W7225449716","https://openalex.org/W3039250388","https://openalex.org/W7214625063","https://openalex.org/W7223674459","https://openalex.org/W7224079685","https://openalex.org/W7225455376","https://openalex.org/W7225454628","https://openalex.org/W4414682792","https://openalex.org/W7223473065","https://openalex.org/W4416577588"],"abstract_inverted_index":{"The":[0],"Signed-Volume":[1,167,193,222],"(SV0)":[2],"dark":[3],"energy":[4],"model":[5,53],"has":[6],"been":[7],"shown":[8],"to":[9,21,35,88,126,146],"provide":[10],"a":[11,31,98,117,166],"structurally":[12],"guaranteed":[13],"phantom":[14],"crossing":[15,57,86,131,137],"without":[16],"the":[17,22,51,65,85,94,107,129,135,179,192,206,221],"divergence":[18],"issues":[19],"inherent":[20],"Chevallier-Polarski-Linder":[23],"(CPL)":[24],"parametrization.":[25],"In":[26],"this":[27],"paper,":[28],"we":[29,78],"perform":[30],"Fisher":[32],"matrix":[33],"forecast":[34],"determine":[36],"how":[37],"well":[38],"future":[39],"Stage-IV":[40,81,124],"surveys":[41,125],"(such":[42],"as":[43],"DESI":[44],"DR3,":[45],"Euclid,":[46],"and":[47,55,68,100,112],"Rubin)":[48],"will":[49,83,122],"constrain":[50,84],"SV0":[52,108,133,207],"parameters":[54],"its":[56],"redshift":[58,87],"(z_c).":[59],"Using":[60],"projected":[61],"1%":[62],"uncertainties":[63],"on":[64,153],"Hubble":[66],"parameter":[67],"angular":[69],"diameter":[70],"distance":[71],"across":[72],"0":[73],"<":[74,76],"z":[75],"2,":[77],"find":[79],"that":[80,121],"data":[82],"\u03c3(z_c)":[89,104],"\u2248":[90,105],"0.008.":[91],"Crucially,":[92],"while":[93],"CPL":[95],"parametrization":[96],"yields":[97],"broader":[99],"highly":[101],"correlated":[102],"uncertainty":[103],"0.025,":[106],"prediction":[109],"remains":[110],"sharp":[111],"robust.":[113],"This":[114],"sharpness":[115],"provides":[116],"distinct":[118],"observational":[119],"signature":[120],"allow":[123],"decisively":[127],"distinguish":[128],"structural":[130],"of":[132,138,178,191,220],"from":[134],"phenomenological":[136],"CPL.":[139],"Data":[140],"Availability:The":[141],"Python":[142],"(NumPy)":[143],"code":[144],"used":[145],"generate":[147],"these":[148],"forecasts":[149],"is":[150],"publicly":[151],"available":[152],"Zenodo":[154],"at:":[155],"https://doi.org/10.5281/zenodo.24035597":[156],"References:[1]":[157],"M.":[158,173,186,199,214],"U.":[159,174,187,200,215],"Sandaruwan,":[160,175,188,201,216],"\"Structurally":[161],"Guaranteed":[162],"Phantom":[163,181],"Crossing":[164],"in":[165,205],"Effective":[168,194],"Fluid...\"":[169,195],"(2026).":[170,183,196,211,226],"Zenodo:":[171,184,197,212,227],"https://doi.org/10.5281/zenodo.24026844[2]":[172],"\"Microphysical":[176],"Origin":[177],"Algebraic":[180],"Crossing...\"":[182],"https://doi.org/10.5281/zenodo.24032977[3]":[185],"\"Covariant":[189],"Formulation":[190],"https://doi.org/10.5281/zenodo.24033838[4]":[198],"\"Gauge-Invariant":[202],"Cosmological":[203],"Perturbations":[204],"Dark":[208,223],"Energy":[209,224],"Model...\"":[210,225],"https://doi.org/10.5281/zenodo.24034927[5]":[213],"\"Dynamical":[217],"Systems":[218],"Analysis":[219],"https://doi.org/10.5281/zenodo.24035268":[228]},"counts_by_year":[],"updated_date":"2026-11-09T13:22:03.289127","created_date":"2026-11-08T00:00:00"}