{"id":"https://openalex.org/W7131122559","doi":"https://doi.org/10.48550/arxiv.2602.18023","title":"Observer-robust energy condition verification for warp drive spacetimes","display_name":"Observer-robust energy condition verification for warp drive spacetimes","publication_year":2026,"publication_date":"2026-02-20","ids":{"openalex":"https://openalex.org/W7131122559","doi":"https://doi.org/10.48550/arxiv.2602.18023"},"language":null,"primary_location":{"id":"pmh:doi:10.48550/arxiv.2602.18023","is_oa":true,"landing_page_url":null,"pdf_url":null,"source":{"id":"https://openalex.org/S4406922384","display_name":"Open MIND","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"publisher-specific-oa","license_id":"https://openalex.org/licenses/publisher-specific-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Article"},"type":"article","indexed_in":["datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":null,"any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5105890626","display_name":"A. T. Le","orcid":null},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Le, An T.","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":["https://openalex.org/A5105890626"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.23275725,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"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/T10463","display_name":"Pulsars and Gravitational Waves Research","score":0.2806999981403351,"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/T10463","display_name":"Pulsars and Gravitational Waves Research","score":0.2806999981403351,"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/T10095","display_name":"Cosmology and Gravitation Theories","score":0.23829999566078186,"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/T10026","display_name":"Galaxies: Formation, Evolution, Phenomena","score":0.17739999294281006,"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/rapidity","display_name":"Rapidity","score":0.7444999814033508},{"id":"https://openalex.org/keywords/observer","display_name":"Observer (physics)","score":0.715399980545044},{"id":"https://openalex.org/keywords/geodesic","display_name":"Geodesic","score":0.6057000160217285},{"id":"https://openalex.org/keywords/energy-condition","display_name":"Energy condition","score":0.5909000039100647},{"id":"https://openalex.org/keywords/metric","display_name":"Metric (unit)","score":0.4880000054836273},{"id":"https://openalex.org/keywords/scaling","display_name":"Scaling","score":0.4724000096321106},{"id":"https://openalex.org/keywords/parameterized-complexity","display_name":"Parameterized complexity","score":0.46219998598098755},{"id":"https://openalex.org/keywords/python","display_name":"Python (programming language)","score":0.4586000144481659},{"id":"https://openalex.org/keywords/grid","display_name":"Grid","score":0.4424000084400177}],"concepts":[{"id":"https://openalex.org/C107165499","wikidata":"https://www.wikidata.org/wiki/Q1366833","display_name":"Rapidity","level":3,"score":0.7444999814033508},{"id":"https://openalex.org/C2780704645","wikidata":"https://www.wikidata.org/wiki/Q9251458","display_name":"Observer (physics)","level":2,"score":0.715399980545044},{"id":"https://openalex.org/C165818556","wikidata":"https://www.wikidata.org/wiki/Q213488","display_name":"Geodesic","level":2,"score":0.6057000160217285},{"id":"https://openalex.org/C149643647","wikidata":"https://www.wikidata.org/wiki/Q986455","display_name":"Energy condition","level":3,"score":0.5909000039100647},{"id":"https://openalex.org/C176217482","wikidata":"https://www.wikidata.org/wiki/Q860554","display_name":"Metric (unit)","level":2,"score":0.4880000054836273},{"id":"https://openalex.org/C99844830","wikidata":"https://www.wikidata.org/wiki/Q102441924","display_name":"Scaling","level":2,"score":0.4724000096321106},{"id":"https://openalex.org/C165464430","wikidata":"https://www.wikidata.org/wiki/Q1570441","display_name":"Parameterized complexity","level":2,"score":0.46219998598098755},{"id":"https://openalex.org/C519991488","wikidata":"https://www.wikidata.org/wiki/Q28865","display_name":"Python (programming language)","level":2,"score":0.4586000144481659},{"id":"https://openalex.org/C187691185","wikidata":"https://www.wikidata.org/wiki/Q2020720","display_name":"Grid","level":2,"score":0.4424000084400177},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.4397999942302704},{"id":"https://openalex.org/C186370098","wikidata":"https://www.wikidata.org/wiki/Q442787","display_name":"Energy (signal processing)","level":2,"score":0.41200000047683716},{"id":"https://openalex.org/C158693339","wikidata":"https://www.wikidata.org/wiki/Q190524","display_name":"Eigenvalues and eigenvectors","level":2,"score":0.398499995470047},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.3939000070095062},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.3917999863624573},{"id":"https://openalex.org/C45374587","wikidata":"https://www.wikidata.org/wiki/Q12525525","display_name":"Computation","level":2,"score":0.3776000142097473},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3732999861240387},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.34279999136924744},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.33340001106262207},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.329800009727478},{"id":"https://openalex.org/C28826006","wikidata":"https://www.wikidata.org/wiki/Q33521","display_name":"Applied mathematics","level":1,"score":0.3253999948501587},{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.30570000410079956},{"id":"https://openalex.org/C162392398","wikidata":"https://www.wikidata.org/wiki/Q272404","display_name":"Finite set","level":2,"score":0.3012999892234802},{"id":"https://openalex.org/C137836250","wikidata":"https://www.wikidata.org/wiki/Q984063","display_name":"Optimization problem","level":2,"score":0.2944999933242798},{"id":"https://openalex.org/C9376300","wikidata":"https://www.wikidata.org/wiki/Q168817","display_name":"Algebraic number","level":2,"score":0.2921999990940094},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.2851000130176544},{"id":"https://openalex.org/C10485038","wikidata":"https://www.wikidata.org/wiki/Q48996162","display_name":"Hyperparameter optimization","level":3,"score":0.2833000123500824},{"id":"https://openalex.org/C48753275","wikidata":"https://www.wikidata.org/wiki/Q11216","display_name":"Numerical analysis","level":2,"score":0.2709999978542328},{"id":"https://openalex.org/C192939610","wikidata":"https://www.wikidata.org/wiki/Q188444","display_name":"Differential geometry","level":2,"score":0.2680000066757202},{"id":"https://openalex.org/C198043062","wikidata":"https://www.wikidata.org/wiki/Q180953","display_name":"Metric space","level":2,"score":0.2635999917984009}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:doi:10.48550/arxiv.2602.18023","is_oa":true,"landing_page_url":null,"pdf_url":null,"source":{"id":"https://openalex.org/S4406922384","display_name":"Open MIND","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"publisher-specific-oa","license_id":"https://openalex.org/licenses/publisher-specific-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Article"},{"id":"doi:10.48550/arxiv.2602.18023","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2602.18023","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,"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":null,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"pmh:doi:10.48550/arxiv.2602.18023","is_oa":true,"landing_page_url":null,"pdf_url":null,"source":{"id":"https://openalex.org/S4406922384","display_name":"Open MIND","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"publisher-specific-oa","license_id":"https://openalex.org/licenses/publisher-specific-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Article"},"sustainable_development_goals":[{"display_name":"Affordable and clean energy","id":"https://metadata.un.org/sdg/7","score":0.6215628385543823}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":[],"abstract_inverted_index":{"We":[0],"present":[1],"\\texttt{warpax},":[2],"a":[3,20,33,95,145,172,177,202,221],"JAX-based":[4],"toolkit":[5],"that":[6,207],"certifies":[7],"the":[8,24,27,63,75,89,99,102,113,130,133,137,154,157,164,186,193,197,209,225,231,235],"energy":[9,42,218],"condition":[10,43,219],"structure":[11],"of":[12,26,59,132,163],"warp":[13,82,90],"drive":[14,91,188,228],"spacetimes":[15],"for":[16,46],"all":[17,58,81],"observers,":[18,171],"in":[19,144],"frame-independent":[21],"way,":[22],"from":[23],"eigenstructure":[25],"mixed":[28],"stress-energy":[29],"tensor":[30],"$T^a{}_b$.":[31],"At":[32],"Hawking--Ellis":[34],"Type~I":[35,108],"point,":[36],"an":[37],"eigenvalue":[38,140],"inequality":[39],"decides":[40],"each":[41],"exactly":[44],"and":[45,56,68,116,196,220,230],"every":[47,110,227],"observer.":[48,180],"A":[49,181,214],"Type~IV":[50,123,138],"point":[51],"has":[52],"no":[53,69],"rest":[54],"frame":[55,159],"violates":[57],"them":[60],"unconditionally.":[61],"Because":[62],"eigenvalues":[64],"are":[65,120],"boost":[66],"invariants":[67],"Eulerian":[70,158],"normal":[71],"is":[72,77,106,127,234],"ever":[73],"constructed,":[74],"test":[76],"well":[78],"defined":[79],"at":[80,109],"speeds,":[83],"including":[84],"$v_s":[85],"\\ge":[86],"1$.":[87],"Across":[88],"family,":[92],"this":[93,151],"yields":[94],"clean":[96],"dichotomy":[97],"through":[98],"luminal":[100],"transition:":[101],"irrotational":[103,187],"Rodal":[104,155,232],"geometry":[105,233],"globally":[107],"speed,":[111],"while":[112],"Alcubierre,":[114],"Nat\u00e1rio,":[115],"Van~den~Broeck":[117],"bubble":[118],"walls":[119],"dominated":[121],"by":[122,129,169,176],"regions.":[124],"The":[125],"split":[126],"controlled":[128,146],"vorticity":[131],"ADM":[134],"shift,":[135],"with":[136],"imaginary":[139],"growing":[141],"linearly,":[142],"$f=\u03ba\u03c9$,":[143],"limit.":[147],"Single-frame":[148],"analyses":[149],"understate":[150],"structure.":[152],"For":[153],"drive,":[156],"misses":[160],"about":[161],"$72\\%$":[162],"wall":[165,198],"weak-energy":[166],"violations":[167],"seen":[168],"boosted":[170],"statement":[173],"made":[174],"analytic":[175],"closed-form":[178],"worst":[179],"boost-invariant":[182],"exoticity":[183],"ranking":[184],"places":[185],"roughly":[189],"seventy":[190],"times":[191],"below":[192],"bubble-wall":[194],"drives,":[195],"null-energy":[199],"deficit":[200],"follows":[201],"universal":[203],"$-C":[204],"v_s^2$":[205],"law":[206],"makes":[208],"Santiago--Schuster--Visser":[210],"no-go":[211],"result":[212],"quantitative.":[213],"geodesic-integrated":[215],"averaged":[216],"null":[217],"Ford--Roman":[222],"comparison":[223],"preserve":[224],"ordering:":[226],"violates,":[229],"mildest.":[236]},"counts_by_year":[],"updated_date":"2026-07-28T07:46:37.118299","created_date":"2026-02-24T00:00:00"}
