{"id":"https://openalex.org/W7204918274","doi":"https://doi.org/10.48550/arxiv.2608.29810","title":"Pseudo Entropy in Quantum Spin Chains: from Integrability to Chaos","display_name":"Pseudo Entropy in Quantum Spin Chains: from Integrability to Chaos","publication_year":2026,"publication_date":"2026-08-30","ids":{"openalex":"https://openalex.org/W7204918274","doi":"https://doi.org/10.48550/arxiv.2608.29810"},"language":"en","primary_location":{"id":"pmh:oai:arXiv.org:2608.29810","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2608.29810","pdf_url":"https://arxiv.org/pdf/2608.29810","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"},"volume":null,"type":"preprint","is_traditional":true,"indexed_in":["arxiv","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2608.29810","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5148921733","display_name":"Tara Bahadur Rana","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I155028946","display_name":"Tribhuvan University","ror":"https://ror.org/02rg1r889","country_code":"NP","type":"education","lineage":["https://openalex.org/I155028946"]}],"countries":["NP"],"is_corresponding":false,"raw_author_name":"Rana, Tara Bahadur","raw_affiliation_strings":["Holographic Himalaya , Lambagar , 44600 Tarakeshwar , Nepal","St. Xavier's College , Tribhuvan University , Maitighar , 44600 Kathmandu , Nepal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Holographic Himalaya , Lambagar , 44600 Tarakeshwar , Nepal","institution_ids":[]},{"raw_affiliation_string":"St. Xavier's College , Tribhuvan University , Maitighar , 44600 Kathmandu , Nepal","institution_ids":["https://openalex.org/I155028946"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5148849795","display_name":"Yadav Raj Dahal","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I155028946","display_name":"Tribhuvan University","ror":"https://ror.org/02rg1r889","country_code":"NP","type":"education","lineage":["https://openalex.org/I155028946"]}],"countries":["NP"],"is_corresponding":false,"raw_author_name":"Dahal, Yadav Raj","raw_affiliation_strings":["Central Department of Physics , Tribhuvan University , Kirtipur , 44618 Kathmandu , Nepal","Holographic Himalaya , Lambagar , 44600 Tarakeshwar , Nepal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Central Department of Physics , Tribhuvan University , Kirtipur , 44618 Kathmandu , Nepal","institution_ids":["https://openalex.org/I155028946"]},{"raw_affiliation_string":"Holographic Himalaya , Lambagar , 44600 Tarakeshwar , Nepal","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5012784323","display_name":"Kiran Adhikari","orcid":"https://orcid.org/0000-0002-5912-1515","observed_orcids":["https://orcid.org/0000-0002-5912-1515"]},"institutions":[{"id":"https://openalex.org/I62916508","display_name":"Technical University of Munich","ror":"https://ror.org/02kkvpp62","country_code":"DE","type":"education","lineage":["https://openalex.org/I62916508"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Adhikari, Kiran","raw_affiliation_strings":["Emmy Noether Group for Theoretical Quantum Systems Design , Technical University of Munich , Arcisstra\u00dfe 21 , 80333 M\u00fcnchen , Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Emmy Noether Group for Theoretical Quantum Systems Design , Technical University of Munich , Arcisstra\u00dfe 21 , 80333 M\u00fcnchen , Germany","institution_ids":["https://openalex.org/I62916508"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"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/T11804","display_name":"Quantum many-body systems","score":0.8910999894142151,"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/T11804","display_name":"Quantum many-body systems","score":0.8910999894142151,"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/T11261","display_name":"Quantum chaos and dynamical systems","score":0.09109999984502792,"subfield":{"id":"https://openalex.org/subfields/3109","display_name":"Statistical and Nonlinear 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/T12261","display_name":"Statistical Mechanics and Entropy","score":0.00419999985024333,"subfield":{"id":"https://openalex.org/subfields/3109","display_name":"Statistical and Nonlinear Physics"},"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/pseudo-entropy","display_name":"pseudo-entropy","score":0.984000027179718},{"id":"https://openalex.org/keywords/quantum-spin-chains","display_name":"quantum spin chains","score":0.8989999890327454},{"id":"https://openalex.org/keywords/quantum-chaos","display_name":"quantum chaos","score":0.871999979019165},{"id":"https://openalex.org/keywords/xxz-spin-chain","display_name":"XXZ spin chain","score":0.9309999942779541},{"id":"https://openalex.org/keywords/spectral-form-factor","display_name":"spectral form factor","score":0.9940000176429749},{"id":"https://openalex.org/keywords/fisher-zeros","display_name":"Fisher zeros","score":0.8840000033378601},{"id":"https://openalex.org/keywords/spectral-complexity","display_name":"spectral complexity","score":0.7699999809265137},{"id":"https://openalex.org/keywords/integrability","display_name":"integrability","score":0.7059999704360962},{"id":"https://openalex.org/keywords/holography","display_name":"holography","score":0.9259999990463257}],"concepts":[{"id":"https://openalex.org/C39927690","wikidata":"https://www.wikidata.org/wiki/Q11197","display_name":"Logarithm","level":2,"score":0.6877999901771545},{"id":"https://openalex.org/C42047476","wikidata":"https://www.wikidata.org/wiki/Q6269544","display_name":"Joint quantum entropy","level":3,"score":0.6784999966621399},{"id":"https://openalex.org/C5084201","wikidata":"https://www.wikidata.org/wiki/Q17090689","display_name":"Generalized relative entropy","level":5,"score":0.6090999841690063},{"id":"https://openalex.org/C106301342","wikidata":"https://www.wikidata.org/wiki/Q4117933","display_name":"Entropy (arrow of time)","level":2,"score":0.5898000001907349},{"id":"https://openalex.org/C24495805","wikidata":"https://www.wikidata.org/wiki/Q7269091","display_name":"Quantum relative entropy","level":5,"score":0.5727999806404114},{"id":"https://openalex.org/C121864883","wikidata":"https://www.wikidata.org/wiki/Q677916","display_name":"Statistical physics","level":1,"score":0.5443000197410583},{"id":"https://openalex.org/C99844830","wikidata":"https://www.wikidata.org/wiki/Q102441924","display_name":"Scaling","level":2,"score":0.5389999747276306},{"id":"https://openalex.org/C51329190","wikidata":"https://www.wikidata.org/wiki/Q1076349","display_name":"Ising model","level":2,"score":0.5322999954223633},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.5288000106811523},{"id":"https://openalex.org/C84114770","wikidata":"https://www.wikidata.org/wiki/Q46344","display_name":"Quantum","level":2,"score":0.5126000046730042},{"id":"https://openalex.org/C200741047","wikidata":"https://www.wikidata.org/wiki/Q1957758","display_name":"Integrable system","level":2,"score":0.4586000144481659},{"id":"https://openalex.org/C2780990831","wikidata":"https://www.wikidata.org/wiki/Q319141","display_name":"Conjecture","level":2,"score":0.4316999912261963},{"id":"https://openalex.org/C136269434","wikidata":"https://www.wikidata.org/wiki/Q1502341","display_name":"Quantum chaos","level":4,"score":0.4253000020980835},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.3968999981880188},{"id":"https://openalex.org/C2777052490","wikidata":"https://www.wikidata.org/wiki/Q5072826","display_name":"Chaotic","level":2,"score":0.3930000066757202},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.390500009059906},{"id":"https://openalex.org/C13355873","wikidata":"https://www.wikidata.org/wiki/Q2920850","display_name":"Connection (principal bundle)","level":2,"score":0.32600000500679016},{"id":"https://openalex.org/C37914503","wikidata":"https://www.wikidata.org/wiki/Q156495","display_name":"Mathematical physics","level":1,"score":0.321399986743927},{"id":"https://openalex.org/C121040770","wikidata":"https://www.wikidata.org/wiki/Q215675","display_name":"Quantum entanglement","level":3,"score":0.31439998745918274},{"id":"https://openalex.org/C142611142","wikidata":"https://www.wikidata.org/wiki/Q1433083","display_name":"R\u00e9nyi entropy","level":3,"score":0.3068999946117401},{"id":"https://openalex.org/C171752962","wikidata":"https://www.wikidata.org/wiki/Q255166","display_name":"Kullback\u2013Leibler divergence","level":2,"score":0.3021000027656555},{"id":"https://openalex.org/C2780198381","wikidata":"https://www.wikidata.org/wiki/Q17083882","display_name":"Spin model","level":2,"score":0.2989000082015991},{"id":"https://openalex.org/C139356082","wikidata":"https://www.wikidata.org/wiki/Q7269038","display_name":"Quantum discord","level":4,"score":0.28769999742507935},{"id":"https://openalex.org/C168110828","wikidata":"https://www.wikidata.org/wiki/Q1331626","display_name":"Spectral density","level":2,"score":0.2797999978065491}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:arXiv.org:2608.29810","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2608.29810","pdf_url":"https://arxiv.org/pdf/2608.29810","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.2608.29810","doi":"https://doi.org/10.48550/arxiv.2608.29810","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2608.29810","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:2608.29810","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2608.29810","pdf_url":"https://arxiv.org/pdf/2608.29810","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":[{"id":"https://openalex.org/F4320320894","display_name":"Abdus Salam International Centre for Theoretical Physics","ror":"https://ror.org/009gyvm78"}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7204918274.pdf","grobid_xml":"https://content.openalex.org/works/W7204918274.grobid-xml"},"referenced_works_count":4,"referenced_works":["https://openalex.org/W1675674708","https://openalex.org/W4229497514","https://openalex.org/W4415490929","https://openalex.org/W7166705881"],"related_works":["https://openalex.org/W4392736973","https://openalex.org/W4406137022","https://openalex.org/W2008353338","https://openalex.org/W6986618585","https://openalex.org/W4402095883","https://openalex.org/W2031661210","https://openalex.org/W7046713909","https://openalex.org/W3099806464","https://openalex.org/W2005947770","https://openalex.org/W1918119618"],"abstract_inverted_index":{"In":[0],"this":[1],"work,":[2],"we":[3,34,114,135],"study":[4],"pseudo":[5,46,57,74,108,141,144],"entropy":[6,47,58,75,109],"and":[7,17,48,66,125,128,146],"spectral":[8,50,147],"dynamics":[9],"in":[10,72,102,110,122],"quantum":[11,31],"spin":[12],"chains":[13],"(Heisenberg":[14],"XXZ":[15,112],"model":[16],"the":[18,40,44,49,61,69,81,103,111,117,130],"mixed-field":[19],"Ising":[20],"model)":[21],"to":[22,153],"investigate":[23],"whether":[24],"they":[25],"can":[26,90],"serve":[27],"as":[28],"diagnostics":[29],"of":[30,43],"chaos.":[32,77],"First,":[33],"derive":[35,136],"an":[36,137],"exact":[37,138],"relation":[38],"between":[39,140],"real":[41,104],"part":[42],"thermal":[45],"form":[51],"factor.":[52],"This":[53],"provided":[54],"evidence":[55],"that":[56,80,98,116,129],"could":[59],"exhibit":[60],"characteristic":[62],"dip,":[63],"logarithmic":[64,118],"ramp,":[65],"plateau,":[67],"implying":[68],"precise":[70],"manner":[71],"which":[73],"probes":[76],"We":[78],"found":[79],"imaginary":[82],"part,":[83],"while":[84],"it":[85],"does":[86],"not":[87,100],"diagnose":[88],"chaos,":[89],"still":[91],"provide":[92],"crucial":[93],"information":[94],"about":[95],"Fisher":[96],"zeros":[97],"is":[99],"available":[101],"counterpart.":[105],"For":[106],"spatial":[107],"chain,":[113],"find":[115],"critical":[119],"scaling":[120],"persists":[121],"both":[123],"integrable":[124],"chaotic":[126],"regimes,":[127],"non-positivity":[131],"conjecture":[132],"holds.":[133],"Finally,":[134],"connection":[139,152],"entropy,":[142,145],"relative":[143],"complexity":[148],"with":[149],"a":[150],"potential":[151],"holography.":[154]},"counts_by_year":[],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2026-09-02T00:00:00"}
