{"id":"https://openalex.org/W7211878015","doi":"https://doi.org/10.48550/arxiv.2609.04996","title":"Fisher-information retention under local driving in non-Hermitian feed-forward chains","display_name":"Fisher-information retention under local driving in non-Hermitian feed-forward chains","publication_year":2026,"publication_date":"2026-09-04","ids":{"openalex":"https://openalex.org/W7211878015","doi":"https://doi.org/10.48550/arxiv.2609.04996"},"language":"en","primary_location":{"id":"pmh:oai:arXiv.org:2609.04996","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2609.04996","pdf_url":"https://arxiv.org/pdf/2609.04996","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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"volume":null,"type":"preprint","indexed_in":["arxiv","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2609.04996","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5150585110","display_name":"Qingrui Bai","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Bai, Qingrui","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5150704255","display_name":"Zhichao Li","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Li, Zhichao","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5125317703","display_name":"Junlong Kou","orcid":"https://orcid.org/0000-0002-0481-5149","observed_orcids":["https://orcid.org/0000-0002-0481-5149"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Kou, Junlong","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":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/T11262","display_name":"Quantum Mechanics and Non-Hermitian Physics","score":0.9380000233650208,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"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/T11262","display_name":"Quantum Mechanics and Non-Hermitian Physics","score":0.9380000233650208,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"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/T11996","display_name":"Random lasers and scattering media","score":0.0052999998442828655,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"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/T10245","display_name":"Metamaterials and Metasurfaces Applications","score":0.00430000014603138,"subfield":{"id":"https://openalex.org/subfields/2504","display_name":"Electronic, Optical and Magnetic Materials"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/non-hermitian-physics","display_name":"non-Hermitian physics","score":0.8569999933242798},{"id":"https://openalex.org/keywords/fisher-information","display_name":"Fisher information","score":0.8600000143051147},{"id":"https://openalex.org/keywords/green-s-function","display_name":"Green's function","score":0.7099999785423279},{"id":"https://openalex.org/keywords/port-layout","display_name":"port layout","score":0.45399999618530273},{"id":"https://openalex.org/keywords/electromagnetic-energy-storage","display_name":"electromagnetic energy storage","score":0.4519999921321869}],"concepts":[{"id":"https://openalex.org/C178650346","wikidata":"https://www.wikidata.org/wiki/Q201984","display_name":"Covariance","level":2,"score":0.6304000020027161},{"id":"https://openalex.org/C45340560","wikidata":"https://www.wikidata.org/wiki/Q215382","display_name":"Disjoint sets","level":2,"score":0.5712000131607056},{"id":"https://openalex.org/C2780451532","wikidata":"https://www.wikidata.org/wiki/Q759676","display_name":"Task (project management)","level":2,"score":0.5393000245094299},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5234000086784363},{"id":"https://openalex.org/C168167062","wikidata":"https://www.wikidata.org/wiki/Q1117970","display_name":"Component (thermodynamics)","level":2,"score":0.5202000141143799},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.4916999936103821},{"id":"https://openalex.org/C163716315","wikidata":"https://www.wikidata.org/wiki/Q901177","display_name":"Gaussian","level":2,"score":0.48069998621940613},{"id":"https://openalex.org/C32834561","wikidata":"https://www.wikidata.org/wiki/Q660730","display_name":"Subspace topology","level":2,"score":0.4320000112056732},{"id":"https://openalex.org/C32802771","wikidata":"https://www.wikidata.org/wiki/Q2443617","display_name":"Port (circuit theory)","level":2,"score":0.42399999499320984},{"id":"https://openalex.org/C165064840","wikidata":"https://www.wikidata.org/wiki/Q1321061","display_name":"Matching (statistics)","level":2,"score":0.3984000086784363},{"id":"https://openalex.org/C2776865275","wikidata":"https://www.wikidata.org/wiki/Q311666","display_name":"Projector","level":2,"score":0.37770000100135803},{"id":"https://openalex.org/C77170095","wikidata":"https://www.wikidata.org/wiki/Q1753188","display_name":"Linearity","level":2,"score":0.3709000051021576},{"id":"https://openalex.org/C131584629","wikidata":"https://www.wikidata.org/wiki/Q4308705","display_name":"Coupling (piping)","level":2,"score":0.36320000886917114},{"id":"https://openalex.org/C2777813233","wikidata":"https://www.wikidata.org/wiki/Q1527816","display_name":"Grating","level":2,"score":0.36309999227523804},{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.36039999127388},{"id":"https://openalex.org/C185142706","wikidata":"https://www.wikidata.org/wiki/Q1134404","display_name":"Covariance matrix","level":2,"score":0.35040000081062317},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3488999903202057},{"id":"https://openalex.org/C33676613","wikidata":"https://www.wikidata.org/wiki/Q13415176","display_name":"Dimension (graph theory)","level":2,"score":0.3467000126838684},{"id":"https://openalex.org/C179254644","wikidata":"https://www.wikidata.org/wiki/Q13222844","display_name":"Moment (physics)","level":2,"score":0.3411000072956085},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.3352999985218048},{"id":"https://openalex.org/C48677424","wikidata":"https://www.wikidata.org/wiki/Q6888088","display_name":"Mode (computer interface)","level":2,"score":0.3330000042915344},{"id":"https://openalex.org/C2778067643","wikidata":"https://www.wikidata.org/wiki/Q166507","display_name":"Interval (graph theory)","level":2,"score":0.3321000039577484},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.322299987077713},{"id":"https://openalex.org/C2779664074","wikidata":"https://www.wikidata.org/wiki/Q3518405","display_name":"Terminal (telecommunication)","level":2,"score":0.31929999589920044},{"id":"https://openalex.org/C18555067","wikidata":"https://www.wikidata.org/wiki/Q8375051","display_name":"Joint (building)","level":2,"score":0.31619998812675476},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.30640000104904175},{"id":"https://openalex.org/C2778023678","wikidata":"https://www.wikidata.org/wiki/Q554403","display_name":"Duality (order theory)","level":2,"score":0.2971999943256378},{"id":"https://openalex.org/C147764199","wikidata":"https://www.wikidata.org/wiki/Q6865248","display_name":"Minification","level":2,"score":0.2919999957084656},{"id":"https://openalex.org/C77246614","wikidata":"https://www.wikidata.org/wiki/Q1409400","display_name":"Gramian matrix","level":3,"score":0.2777999937534332},{"id":"https://openalex.org/C2778112365","wikidata":"https://www.wikidata.org/wiki/Q3511065","display_name":"Sequence (biology)","level":2,"score":0.2773999869823456},{"id":"https://openalex.org/C77553402","wikidata":"https://www.wikidata.org/wiki/Q13222579","display_name":"Upper and lower bounds","level":2,"score":0.27649998664855957},{"id":"https://openalex.org/C2778738845","wikidata":"https://www.wikidata.org/wiki/Q1521829","display_name":"Remanufacturing","level":2,"score":0.2720000147819519},{"id":"https://openalex.org/C136643341","wikidata":"https://www.wikidata.org/wiki/Q1361526","display_name":"Reachability","level":2,"score":0.27000001072883606},{"id":"https://openalex.org/C196083921","wikidata":"https://www.wikidata.org/wiki/Q7915758","display_name":"Variance (accounting)","level":2,"score":0.26820001006126404},{"id":"https://openalex.org/C51432778","wikidata":"https://www.wikidata.org/wiki/Q1259145","display_name":"Independent component analysis","level":2,"score":0.2653999924659729},{"id":"https://openalex.org/C6802819","wikidata":"https://www.wikidata.org/wiki/Q1072174","display_name":"Linear system","level":2,"score":0.2558000087738037},{"id":"https://openalex.org/C65682993","wikidata":"https://www.wikidata.org/wiki/Q1056451","display_name":"Reflection (computer programming)","level":2,"score":0.2547999918460846}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:arXiv.org:2609.04996","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2609.04996","pdf_url":"https://arxiv.org/pdf/2609.04996","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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"doi:10.48550/arxiv.2609.04996","doi":"https://doi.org/10.48550/arxiv.2609.04996","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2609.04996","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":"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":"pmh:oai:arXiv.org:2609.04996","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2609.04996","pdf_url":"https://arxiv.org/pdf/2609.04996","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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G3035230352","display_name":null,"funder_award_id":"0213-14380292","funder_id":"https://openalex.org/F4320335787","funder_display_name":"Fundamental Research Funds for the Central Universities"},{"id":"https://openalex.org/G6442716934","display_name":null,"funder_award_id":"BK20232001","funder_id":"https://openalex.org/F4320322769","funder_display_name":"Natural Science Foundation of Jiangsu Province"}],"funders":[{"id":"https://openalex.org/F4320322769","display_name":"Natural Science Foundation of Jiangsu Province","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320324852","display_name":"Nanjing University","ror":"https://ror.org/01rxvg760"},{"id":"https://openalex.org/F4320335787","display_name":"Fundamental Research Funds for the Central Universities","ror":null}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7211878015.pdf","grobid_xml":"https://content.openalex.org/works/W7211878015.grobid-xml"},"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W3204041324","https://openalex.org/W6941255050","https://openalex.org/W7203917527","https://openalex.org/W7215103040","https://openalex.org/W7221751074","https://openalex.org/W7160326304","https://openalex.org/W2156716514","https://openalex.org/W7095775397","https://openalex.org/W7095086868","https://openalex.org/W7172395850"],"abstract_inverted_index":{"When":[0],"local":[1],"drive":[2,52],"hardware":[3,53],"is":[4,10],"installed":[5],"before":[6],"a":[7,16,123,131,136,180,186,192],"sensing":[8],"task":[9,188],"revealed,":[11],"directional":[12,177],"non-Hermitian":[13],"buildup":[14,178],"creates":[15],"tradeoff":[17,27],"between":[18],"targeted":[19],"preparation":[20,71],"and":[21,45,90,145,170],"spatial":[22,193],"coverage.":[23],"We":[24],"quantify":[25],"this":[26,104,149],"for":[28,119,185,196],"stable":[29],"linear":[30],"scatterers":[31],"with":[32,163],"proper":[33],"complex":[34],"Gaussian":[35],"output":[36],"statistics.":[37],"For":[38],"parameters":[39],"encoded":[40],"in":[41,95],"the":[42,51,55,62,65,70,74,91,108,160,200],"internal":[43,49],"generator,":[44],"at":[46,199],"fixed":[47],"coherent":[48],"resource,":[50],"enters":[54],"optimized":[56],"mean-response":[57],"Fisher":[58,168],"information":[59],"only":[60],"through":[61],"projector":[63],"onto":[64],"internally":[66],"reachable":[67],"subspace,":[68],"while":[69],"Gramian":[72],"sets":[73],"source":[75,183],"cost.":[76],"In":[77],"an":[78],"on-resonance":[79],"feed-forward":[80],"chain,":[81],"nested":[82],"Green-function":[83],"columns":[84],"decompose":[85],"into":[86,179],"disjoint":[87],"port":[88,115],"intervals,":[89,122],"site-local":[92],"retention":[93,110,133,161],"factors":[94],"each":[96],"interval":[97],"sum":[98],"exactly":[99],"to":[100,152],"unity.":[101],"Directionality":[102],"concentrates":[103],"unit":[105],"downstream,":[106],"so":[107],"worst-site":[109,132],"decays":[111],"exponentially":[112],"when":[113],"one":[114],"serves":[116],"many":[117],"sites;":[118],"$m$":[120,139],"equal":[121],"single":[124],"probe":[125],"shared":[126],"by":[127,135,191],"all":[128],"tasks":[129,197],"has":[130],"lower":[134],"further":[137],"factor":[138],"than":[140],"task-specific":[141],"reoptimization.":[142],"Joint":[143],"source-power":[144],"internal-resource":[146],"constraints":[147],"connect":[148],"fixed-resource":[150],"law":[151,162],"source-limited":[153],"preparation.":[154],"A":[155],"noisy":[156],"RLC/VCCS":[157],"model":[158],"illustrates":[159],"stored":[164],"electromagnetic":[165],"energy,":[166],"covariance":[167],"information,":[169],"component":[171],"disorder.":[172],"The":[173],"resulting":[174],"bounds":[175],"turn":[176],"port-layout":[181],"criterion:":[182],"savings":[184],"selected":[187],"are":[189],"accompanied":[190],"coverage":[194],"cost":[195],"unknown":[198],"hardware-design":[201],"stage.":[202]},"counts_by_year":[],"updated_date":"2026-11-06T12:05:46.655746","created_date":"2026-09-08T00:00:00"}