{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:GVD2GQQSNMXQKT4FXVDA6P4KLQ","short_pith_number":"pith:GVD2GQQS","schema_version":"1.0","canonical_sha256":"3547a342126b2f054f85bd460f3f8a5c32cea78fb00385c432e53b3add808177","source":{"kind":"arxiv","id":"2101.09316","version":1},"attestation_state":"computed","paper":{"title":"Improved accuracy on noisy devices by non-unitary Variational Quantum Eigensolver for chemistry applications","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph"],"primary_cat":"quant-ph","authors_text":"Chiara Capecci, Francesco Benfenati, Guglielmo Mazzola, Ivano Tavernelli, Leonardo Guidoni, Panagiotis Kl. Barkoutsos, Pauline J. Ollitrault","submitted_at":"2021-01-22T20:17:37Z","abstract_excerpt":"We propose a modification of the Variational Quantum Eigensolver algorithm for electronic structure optimization using quantum computers, named non-unitary Variational Quantum Eigensolver (nu-VQE), in which a non-unitary operator is combined with the original system Hamiltonian leading to a new variational problem with a simplified wavefunction Ansatz. In the present work, we use, as non-unitary operator, the Jastrow factor, inspired from classical Quantum Monte Carlo techniques for simulation of strongly correlated electrons. The method is applied to prototypical molecular Hamiltonians for wh"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2101.09316","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-01-22T20:17:37Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"7b271bee7622428208373b1939a4094c9c61cce5d490a12bde8bb7f4e900697b","abstract_canon_sha256":"e98c54c4f794d22fd579e5cabd822dcecced65f0851bd34becce20c055aac749"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:09:17.618607Z","signature_b64":"y10Iy00D6PBZQjc0c5KFgAXOvNLniQplv07l5vWmEMFComxi0RCN1fXSIUOXN6QzfwE3SL93xa+J5NCy1txpBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3547a342126b2f054f85bd460f3f8a5c32cea78fb00385c432e53b3add808177","last_reissued_at":"2026-07-05T02:09:17.618122Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:09:17.618122Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Improved accuracy on noisy devices by non-unitary Variational Quantum Eigensolver for chemistry applications","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph"],"primary_cat":"quant-ph","authors_text":"Chiara Capecci, Francesco Benfenati, Guglielmo Mazzola, Ivano Tavernelli, Leonardo Guidoni, Panagiotis Kl. Barkoutsos, Pauline J. Ollitrault","submitted_at":"2021-01-22T20:17:37Z","abstract_excerpt":"We propose a modification of the Variational Quantum Eigensolver algorithm for electronic structure optimization using quantum computers, named non-unitary Variational Quantum Eigensolver (nu-VQE), in which a non-unitary operator is combined with the original system Hamiltonian leading to a new variational problem with a simplified wavefunction Ansatz. In the present work, we use, as non-unitary operator, the Jastrow factor, inspired from classical Quantum Monte Carlo techniques for simulation of strongly correlated electrons. The method is applied to prototypical molecular Hamiltonians for wh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.09316","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2101.09316/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"2101.09316","created_at":"2026-07-05T02:09:17.618178+00:00"},{"alias_kind":"arxiv_version","alias_value":"2101.09316v1","created_at":"2026-07-05T02:09:17.618178+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.09316","created_at":"2026-07-05T02:09:17.618178+00:00"},{"alias_kind":"pith_short_12","alias_value":"GVD2GQQSNMXQ","created_at":"2026-07-05T02:09:17.618178+00:00"},{"alias_kind":"pith_short_16","alias_value":"GVD2GQQSNMXQKT4F","created_at":"2026-07-05T02:09:17.618178+00:00"},{"alias_kind":"pith_short_8","alias_value":"GVD2GQQS","created_at":"2026-07-05T02:09:17.618178+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2508.11270","citing_title":"Multi-QIDA method for VQE state preparation in molecular systems","ref_index":14,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ","json":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ.json","graph_json":"https://pith.science/api/pith-number/GVD2GQQSNMXQKT4FXVDA6P4KLQ/graph.json","events_json":"https://pith.science/api/pith-number/GVD2GQQSNMXQKT4FXVDA6P4KLQ/events.json","paper":"https://pith.science/paper/GVD2GQQS"},"agent_actions":{"view_html":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ","download_json":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ.json","view_paper":"https://pith.science/paper/GVD2GQQS","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2101.09316&json=true","fetch_graph":"https://pith.science/api/pith-number/GVD2GQQSNMXQKT4FXVDA6P4KLQ/graph.json","fetch_events":"https://pith.science/api/pith-number/GVD2GQQSNMXQKT4FXVDA6P4KLQ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ/action/storage_attestation","attest_author":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ/action/author_attestation","sign_citation":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ/action/citation_signature","submit_replication":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ/action/replication_record"}},"created_at":"2026-07-05T02:09:17.618178+00:00","updated_at":"2026-07-05T02:09:17.618178+00:00"}