{"id":"https://openalex.org/W7164042378","doi":"https://doi.org/10.48550/arxiv.2606.09803","title":"Echo-Memory: A Controlled Study of Memory in Action World Models","display_name":"Echo-Memory: A Controlled Study of Memory in Action World Models","publication_year":2026,"publication_date":"2026-06-08","ids":{"openalex":"https://openalex.org/W7164042378","doi":"https://doi.org/10.48550/arxiv.2606.09803"},"language":null,"primary_location":{"id":"doi:10.48550/arxiv.2606.09803","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2606.09803","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"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":"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"},"type":"preprint","indexed_in":["datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://doi.org/10.48550/arxiv.2606.09803","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5138214771","display_name":"Wayne King","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"King, Wayne","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5040083129","display_name":"Zeyue Xue","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Xue, Zeyue","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5062922713","display_name":"Yuxuan Bian","orcid":"https://orcid.org/0000-0002-5846-417X"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Bian, Yuxuan","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5138214189","display_name":"Jie Huang","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Huang, Jie","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5138282502","display_name":"Haoran Li","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Li, Haoran","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5138211263","display_name":"Yaowei Li","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Li, Yaowei","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5129016858","display_name":"Yaofeng Su","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Su, Yaofeng","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5138249487","display_name":"Yuming Li","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Li, Yuming","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5138261074","display_name":"Haoyu Wang","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Wang, Haoyu","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5138286755","display_name":"Shiyi Zhang","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Zhang, Shiyi","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5059916557","display_name":"Songchun Zhang","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Zhang, Songchun","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5138208591","display_name":"Yuwei Niu","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Niu, Yuwei","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5138272677","display_name":"Sihan Xu","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Xu, Sihan","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5138234299","display_name":"Junhao Zhuang","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Zhuang, Junhao","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5020769158","display_name":"Haoyang Huang","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Huang, Haoyang","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5138266330","display_name":"Nan Duan","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Duan, Nan","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"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/T10812","display_name":"Human Pose and Action Recognition","score":0.6543999910354614,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10812","display_name":"Human Pose and Action Recognition","score":0.6543999910354614,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10775","display_name":"Generative Adversarial Networks and Image Synthesis","score":0.049300000071525574,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11605","display_name":"Visual Attention and Saliency Detection","score":0.04410000145435333,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/salient","display_name":"Salient","score":0.4984000027179718},{"id":"https://openalex.org/keywords/context","display_name":"Context (archaeology)","score":0.4916999936103821},{"id":"https://openalex.org/keywords/fidelity","display_name":"Fidelity","score":0.45890000462532043},{"id":"https://openalex.org/keywords/conflation","display_name":"Conflation","score":0.4169999957084656},{"id":"https://openalex.org/keywords/object","display_name":"Object (grammar)","score":0.4052000045776367},{"id":"https://openalex.org/keywords/memory-errors","display_name":"Memory errors","score":0.39239999651908875},{"id":"https://openalex.org/keywords/action","display_name":"Action (physics)","score":0.35260000824928284},{"id":"https://openalex.org/keywords/memory-model","display_name":"Memory model","score":0.34869998693466187}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7181000113487244},{"id":"https://openalex.org/C2780719617","wikidata":"https://www.wikidata.org/wiki/Q1030752","display_name":"Salient","level":2,"score":0.4984000027179718},{"id":"https://openalex.org/C2779343474","wikidata":"https://www.wikidata.org/wiki/Q3109175","display_name":"Context (archaeology)","level":2,"score":0.4916999936103821},{"id":"https://openalex.org/C2776459999","wikidata":"https://www.wikidata.org/wiki/Q2119376","display_name":"Fidelity","level":2,"score":0.45890000462532043},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.42010000348091125},{"id":"https://openalex.org/C130440534","wikidata":"https://www.wikidata.org/wiki/Q14946528","display_name":"Conflation","level":2,"score":0.4169999957084656},{"id":"https://openalex.org/C2781238097","wikidata":"https://www.wikidata.org/wiki/Q175026","display_name":"Object (grammar)","level":2,"score":0.4052000045776367},{"id":"https://openalex.org/C119907115","wikidata":"https://www.wikidata.org/wiki/Q6815725","display_name":"Memory errors","level":3,"score":0.39239999651908875},{"id":"https://openalex.org/C2780791683","wikidata":"https://www.wikidata.org/wiki/Q846785","display_name":"Action (physics)","level":2,"score":0.35260000824928284},{"id":"https://openalex.org/C180747234","wikidata":"https://www.wikidata.org/wiki/Q23373","display_name":"Cognitive psychology","level":1,"score":0.35010001063346863},{"id":"https://openalex.org/C12186640","wikidata":"https://www.wikidata.org/wiki/Q6815743","display_name":"Memory model","level":3,"score":0.34869998693466187},{"id":"https://openalex.org/C2780451532","wikidata":"https://www.wikidata.org/wiki/Q759676","display_name":"Task (project management)","level":2,"score":0.321399986743927},{"id":"https://openalex.org/C2780385302","wikidata":"https://www.wikidata.org/wiki/Q367158","display_name":"Protocol (science)","level":3,"score":0.30570000410079956},{"id":"https://openalex.org/C82687282","wikidata":"https://www.wikidata.org/wiki/Q66221","display_name":"Auxiliary memory","level":2,"score":0.28790000081062317},{"id":"https://openalex.org/C146249460","wikidata":"https://www.wikidata.org/wiki/Q2914991","display_name":"Fixation (population genetics)","level":3,"score":0.2872999906539917},{"id":"https://openalex.org/C15744967","wikidata":"https://www.wikidata.org/wiki/Q9418","display_name":"Psychology","level":0,"score":0.28290000557899475},{"id":"https://openalex.org/C100660578","wikidata":"https://www.wikidata.org/wiki/Q18733","display_name":"Recall","level":2,"score":0.2784999907016754},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.2768000066280365},{"id":"https://openalex.org/C74426580","wikidata":"https://www.wikidata.org/wiki/Q719484","display_name":"Memory map","level":3,"score":0.2766000032424927},{"id":"https://openalex.org/C168900304","wikidata":"https://www.wikidata.org/wiki/Q171407","display_name":"Valence (chemistry)","level":2,"score":0.2624000012874603},{"id":"https://openalex.org/C176649486","wikidata":"https://www.wikidata.org/wiki/Q2308807","display_name":"Memory management","level":3,"score":0.25600001215934753},{"id":"https://openalex.org/C179226034","wikidata":"https://www.wikidata.org/wiki/Q18599","display_name":"Short-term memory","level":4,"score":0.25060001015663147}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.48550/arxiv.2606.09803","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2606.09803","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":null,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"doi:10.48550/arxiv.2606.09803","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2606.09803","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"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":"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":[{"score":0.7087356448173523,"id":"https://metadata.un.org/sdg/16","display_name":"Peace, Justice and strong institutions"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":[],"abstract_inverted_index":{"We":[0,129],"present":[1],"\\textbf{Echo-Memory},":[2],"a":[3,19,89,134,156,161,169,187,236],"controlled":[4],"study":[5],"of":[6,221],"memory":[7,33,54,132,223,241],"mechanisms":[8],"in":[9,214,242],"action-conditioned":[10],"world":[11,244],"models.":[12],"These":[13,233],"models":[14,245],"generate":[15],"multi-segment":[16],"videos":[17],"from":[18],"first":[20],"frame,":[21],"text":[22],"prompt,":[23],"and":[24,43,68,76,83,98,113,127,142,173,194],"camera-action":[25,95],"sequence,":[26],"but":[27],"their":[28],"central":[29],"failure":[30],"is":[31,81,154,168,185,208],"often":[32],"rather":[34],"than":[35,179],"local":[36],"image":[37],"synthesis:":[38],"after":[39],"the":[40,45,73,86,198,209,219,228],"camera":[41],"leaves":[42],"returns,":[44],"scene":[46],"or":[47],"salient":[48,199],"object":[49],"may":[50],"silently":[51],"change.":[52],"Existing":[53],"designs":[55],"are":[56,62],"hard":[57],"to":[58,230],"compare":[59,102],"because":[60],"gains":[61],"entangled":[63],"with":[64,109],"backbone,":[65,93],"training,":[66],"retrieval,":[67],"evaluation":[69,99],"differences.":[70],"Echo-Memory":[71],"fixes":[72],"action-to-video":[74],"interface":[75],"varies":[77],"only":[78],"how":[79],"history":[80],"stored":[82],"read":[84],"by":[85],"generator.":[87],"Under":[88],"shared":[90],"video":[91],"diffusion":[92],"optimizer,":[94],"representation,":[96],"sampler,":[97],"pipeline,":[100],"we":[101],"raw":[103],"context,":[104],"compression-based":[105],"memory,":[106],"spatial":[107,193],"summaries":[108],"different":[110],"read-out":[111],"paths,":[112],"state-space":[114,206],"recurrence.":[115],"This":[116],"matched":[117],"matrix":[118],"separates":[119],"four":[120],"otherwise":[121],"conflated":[122],"axes:":[123],"\\emph{capacity},":[124],"\\emph{compression},":[125],"\\emph{read-out},":[126],"\\emph{recurrence}.":[128],"also":[130],"evaluate":[131],"through":[133],"three-branch":[135],"protocol:":[136],"replay":[137,152,182,248],"quality,":[138],"in-domain":[139],"loop":[140],"revisit,":[141],"open-domain":[143,175,211],"return":[144,176,212],"probes.":[145],"The":[146],"branches":[147],"routinely":[148],"disagree,":[149],"showing":[150,217],"that":[151,218],"fidelity":[153],"not":[155,186],"sufficient":[157],"proxy":[158],"for":[159,190,202,239],"remembering":[160],"world.":[162],"Three":[163],"findings":[164],"follow.":[165],"Raw":[166],"context":[167],"strong":[170],"capacity":[171],"baseline":[172],"improves":[174,181],"far":[177],"more":[178],"it":[180],"metrics.":[183,249],"Compactness":[184],"free":[188],"substitute":[189],"capacity:":[191],"aggressive":[192],"hybrid-compression":[195],"memories":[196],"lose":[197],"evidence":[200],"needed":[201],"return.":[203],"Finally,":[204],"block-wise":[205],"recurrence":[207],"strongest":[210],"mechanism":[213],"our":[215],"matrix,":[216],"structure":[220],"implicit":[222],"matters":[224],"as":[225,227],"much":[226],"decision":[229],"use":[231],"it.":[232],"results":[234],"provide":[235],"compact":[237],"protocol":[238],"studying":[240],"action":[243],"beyond":[246],"isolated":[247]},"counts_by_year":[],"updated_date":"2026-07-01T06:00:48.157686","created_date":"2026-06-10T00:00:00"}
