{"id":"https://openalex.org/W4396678618","doi":"https://doi.org/10.22323/1.453.0216","title":"Mixed State Variational Quantum Eigensolver for the Estimation of Expectation Values at Finite Temperature","display_name":"Mixed State Variational Quantum Eigensolver for the Estimation of Expectation Values at Finite Temperature","publication_year":2024,"publication_date":"2024-05-04","ids":{"openalex":"https://openalex.org/W4396678618","doi":"https://doi.org/10.22323/1.453.0216"},"language":"en","primary_location":{"id":"doi:10.22323/1.453.0216","doi":"https://doi.org/10.22323/1.453.0216","is_oa":true,"landing_page_url":"http://dx.doi.org/10.22323/1.453.0216","pdf_url":null,"source":{"id":"https://openalex.org/S4363608674","display_name":"International Symposium on Lattice Field Theory (LATTICE)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of The 40th International Symposium on Lattice Field Theory \u2014 PoS(LATTICE2023)","raw_type":"proceedings-article"},"volume":null,"type":"conference-paper","indexed_in":["arxiv","crossref","datacite"],"open_access":{"is_oa":true,"oa_status":"hybrid","oa_url":"http://dx.doi.org/10.22323/1.453.0216","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5053773537","display_name":"Giuseppe Clemente","orcid":"https://orcid.org/0000-0002-7705-4897","observed_orcids":["https://orcid.org/0000-0002-7705-4897"]},"institutions":[{"id":"https://openalex.org/I160013858","display_name":"Istituto Nazionale di Fisica Nucleare","ror":"https://ror.org/005ta0471","country_code":"IT","type":"government","lineage":["https://openalex.org/I160013858"]},{"id":"https://openalex.org/I2801876189","display_name":"Deutsches Elektronen-Synchrotron DESY","ror":"https://ror.org/01js2sh04","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1305996414","https://openalex.org/I2801876189"]},{"id":"https://openalex.org/I4210160382","display_name":"Istituto Nazionale di Fisica Nucleare, Sezione di Pisa","ror":"https://ror.org/05symbg58","country_code":"IT","type":"facility","lineage":["https://openalex.org/I160013858","https://openalex.org/I4210160382"]}],"countries":["DE","IT"],"is_corresponding":true,"raw_author_name":"Giuseppe Clemente","raw_affiliation_strings":["\ud835\udc4e Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany. \ud835\udc4f Dipartimento di Fisica dell'Universit\u00e0 di Pisa and INFN -Sezione di Pisa, Largo Pontecorvo 3, I-56127 Pisa, Italy"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"\ud835\udc4e Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany. \ud835\udc4f Dipartimento di Fisica dell'Universit\u00e0 di Pisa and INFN -Sezione di Pisa, Largo Pontecorvo 3, I-56127 Pisa, Italy","institution_ids":["https://openalex.org/I160013858","https://openalex.org/I2801876189","https://openalex.org/I4210160382"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5053773537"],"corresponding_institution_ids":["https://openalex.org/I160013858","https://openalex.org/I2801876189","https://openalex.org/I4210160382"],"apc_list":null,"apc_paid":null,"fwci":0.2937,"has_fulltext":true,"cited_by_count":1,"citation_normalized_percentile":{"value":0.4251434,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":93,"max":96},"biblio":{"volume":null,"issue":null,"first_page":"216","last_page":"216"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10682","display_name":"Quantum Computing Algorithms and Architecture","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"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/T10682","display_name":"Quantum Computing Algorithms and Architecture","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"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/T11804","display_name":"Quantum many-body systems","score":0.0003000000142492354,"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/T10622","display_name":"Quantum Mechanics and Applications","score":0.0,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/variational-quantum-eigensolver","display_name":"variational quantum eigensolver","score":0.9369999766349792},{"id":"https://openalex.org/keywords/finite-temperature","display_name":"finite temperature","score":0.6909999847412109},{"id":"https://openalex.org/keywords/expectation-values","display_name":"expectation values","score":0.6079999804496765},{"id":"https://openalex.org/keywords/reweighting","display_name":"reweighting","score":0.7590000033378601},{"id":"https://openalex.org/keywords/hybrid-quantum-classical-algorithms","display_name":"hybrid quantum-classical algorithms","score":0.859000027179718},{"id":"https://openalex.org/keywords/thermal-states","display_name":"thermal states","score":0.5360000133514404},{"id":"https://openalex.org/keywords/quantum-simulation","display_name":"quantum simulation","score":0.35499998927116394},{"id":"https://openalex.org/keywords/resource-scalability","display_name":"resource scalability","score":0.6060000061988831}],"concepts":[{"id":"https://openalex.org/C84114770","wikidata":"https://www.wikidata.org/wiki/Q46344","display_name":"Quantum","level":2,"score":0.62330162525177},{"id":"https://openalex.org/C140479938","wikidata":"https://www.wikidata.org/wiki/Q5254619","display_name":"Iterated function","level":2,"score":0.5820122361183167},{"id":"https://openalex.org/C32848918","wikidata":"https://www.wikidata.org/wiki/Q845789","display_name":"Observable","level":2,"score":0.571958065032959},{"id":"https://openalex.org/C48044578","wikidata":"https://www.wikidata.org/wiki/Q727490","display_name":"Scalability","level":2,"score":0.5368978977203369},{"id":"https://openalex.org/C137019171","wikidata":"https://www.wikidata.org/wiki/Q2623817","display_name":"Quantum algorithm","level":3,"score":0.5335052013397217},{"id":"https://openalex.org/C28826006","wikidata":"https://www.wikidata.org/wiki/Q33521","display_name":"Applied mathematics","level":1,"score":0.5235671401023865},{"id":"https://openalex.org/C56911000","wikidata":"https://www.wikidata.org/wiki/Q831774","display_name":"Density matrix","level":3,"score":0.51114422082901},{"id":"https://openalex.org/C58053490","wikidata":"https://www.wikidata.org/wiki/Q176555","display_name":"Quantum computer","level":3,"score":0.4799671173095703},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4663756489753723},{"id":"https://openalex.org/C8642999","wikidata":"https://www.wikidata.org/wiki/Q4171168","display_name":"Hyperparameter","level":2,"score":0.4382873773574829},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.4333036541938782},{"id":"https://openalex.org/C45374587","wikidata":"https://www.wikidata.org/wiki/Q12525525","display_name":"Computation","level":2,"score":0.42471277713775635},{"id":"https://openalex.org/C121864883","wikidata":"https://www.wikidata.org/wiki/Q677916","display_name":"Statistical physics","level":1,"score":0.384815514087677},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.3613966703414917},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3561638593673706},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.20609694719314575},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.18760043382644653},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.1037701666355133},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.0}],"mesh":[],"locations_count":6,"locations":[{"id":"doi:10.22323/1.453.0216","doi":"https://doi.org/10.22323/1.453.0216","is_oa":true,"landing_page_url":"http://dx.doi.org/10.22323/1.453.0216","pdf_url":null,"source":{"id":"https://openalex.org/S4363608674","display_name":"International Symposium on Lattice Field Theory (LATTICE)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of The 40th International Symposium on Lattice Field Theory \u2014 PoS(LATTICE2023)","raw_type":"proceedings-article"},{"id":"pmh:oai:arXiv.org:2401.17194","doi":null,"is_oa":true,"landing_page_url":"http://arxiv.org/abs/2401.17194","pdf_url":"https://arxiv.org/pdf/2401.17194","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":"pmh:oai:bib-pubdb1.desy.de:602512","doi":null,"is_oa":true,"landing_page_url":"https://bib-pubdb1.desy.de/record/602512","pdf_url":null,"source":{"id":"https://openalex.org/S4306400383","display_name":"DESY Publication Database (PUBDB) (Deutsches Elektronen-Synchrotron)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I2801876189","host_organization_name":"Deutsches Elektronen-Synchrotron DESY","host_organization_lineage":["https://openalex.org/I2801876189"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"doi:10.3204/PUBDB-2024-00632","raw_type":"info:eu-repo/semantics/publishedVersion"},{"id":"pmh:oai:pos.sissa.it:LATTICE2023/216","doi":null,"is_oa":true,"landing_page_url":"https://pos.sissa.it/453/216/","pdf_url":null,"source":{"id":"https://openalex.org/S4377196127","display_name":"Proceedings Of Science","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Text"},{"id":"doi:10.48550/arxiv.2401.17194","doi":"https://doi.org/10.48550/arxiv.2401.17194","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2401.17194","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":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"},{"id":"doi:10.3204/pubdb-2024-00632","doi":"https://doi.org/10.3204/pubdb-2024-00632","is_oa":true,"landing_page_url":"https://doi.org/10.3204/pubdb-2024-00632","pdf_url":null,"source":{"id":"https://openalex.org/S4306400383","display_name":"DESY Publication Database (PUBDB) (Deutsches Elektronen-Synchrotron)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I2801876189","host_organization_name":"Deutsches Elektronen-Synchrotron DESY","host_organization_lineage":["https://openalex.org/I2801876189"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"article-journal"}],"best_oa_location":{"id":"doi:10.22323/1.453.0216","doi":"https://doi.org/10.22323/1.453.0216","is_oa":true,"landing_page_url":"http://dx.doi.org/10.22323/1.453.0216","pdf_url":null,"source":{"id":"https://openalex.org/S4363608674","display_name":"International Symposium on Lattice Field Theory (LATTICE)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of The 40th International Symposium on Lattice Field Theory \u2014 PoS(LATTICE2023)","raw_type":"proceedings-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":33,"referenced_works":["https://openalex.org/W1715636977","https://openalex.org/W1906711976","https://openalex.org/W1976570683","https://openalex.org/W1997391728","https://openalex.org/W2031392878","https://openalex.org/W2046481556","https://openalex.org/W2079992998","https://openalex.org/W2091393784","https://openalex.org/W2106090814","https://openalex.org/W2161685427","https://openalex.org/W2168490876","https://openalex.org/W2397157153","https://openalex.org/W2555333667","https://openalex.org/W2902765729","https://openalex.org/W2984279929","https://openalex.org/W2999982840","https://openalex.org/W3005437076","https://openalex.org/W3033538967","https://openalex.org/W3084133534","https://openalex.org/W3103134838","https://openalex.org/W3196584363","https://openalex.org/W4221159847","https://openalex.org/W4288481489","https://openalex.org/W4382517885","https://openalex.org/W4386032664","https://openalex.org/W4389455440","https://openalex.org/W4390227500","https://openalex.org/W4390580589","https://openalex.org/W4390580839","https://openalex.org/W4391252878","https://openalex.org/W4392864447","https://openalex.org/W4400776331","https://openalex.org/W4405920654"],"related_works":["https://openalex.org/W3106927270","https://openalex.org/W4221151525","https://openalex.org/W2923481626","https://openalex.org/W4387140140","https://openalex.org/W4403422395","https://openalex.org/W4313597000","https://openalex.org/W3045458491","https://openalex.org/W4389455440","https://openalex.org/W7222622525","https://openalex.org/W2970618232"],"abstract_inverted_index":{"We":[0],"introduce":[1],"a":[2,30,34,52,90],"novel":[3],"hybrid":[4],"quantum-classical":[5],"algorithm":[6,86],"for":[7,59],"the":[8,27,56,85],"near-term":[9,91],"computation":[10],"of":[11,61,84],"expectation":[12,57],"values":[13,58],"in":[14],"quantum":[15],"systems":[16],"at":[17],"finite":[18],"temperatures.":[19],"This":[20],"is":[21,39,48,87],"based":[22],"on":[23,26],"two":[24,66],"stages:":[25],"first":[28],"one,":[29],"mixed":[31],"state":[32],"approximating":[33],"fiducial":[35],"truncated":[36],"density":[37],"matrix":[38],"prepared":[40],"through":[41],"Variational":[42],"Quantum":[43],"Eigensolving":[44],"(VQE)":[45],"techniques;":[46],"this":[47],"then":[49,69],"followed":[50],"by":[51],"reweighting":[53],"stage":[54],"where":[55],"observables":[60],"interest":[62],"are":[63],"computed.":[64],"These":[65],"stages":[67],"can":[68],"be":[70],"iterated":[71],"again":[72],"with":[73,89],"different":[74],"hyperparameters":[75],"to":[76],"achieve":[77],"arbitrary":[78],"accuracy.":[79],"Resource":[80],"and":[81],"time":[82],"scalability":[83],"discussed":[88],"perspective.":[92]},"counts_by_year":[{"year":2026,"cited_by_count":1}],"updated_date":"2026-10-31T12:09:11.096373","created_date":"2024-05-07T00:00:00"}