{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:GVD2GQQSNMXQKT4FXVDA6P4KLQ","short_pith_number":"pith:GVD2GQQS","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"},"canonical_sha256":"3547a342126b2f054f85bd460f3f8a5c32cea78fb00385c432e53b3add808177","source":{"kind":"arxiv","id":"2101.09316","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.09316","created_at":"2026-07-05T02:09:17Z"},{"alias_kind":"arxiv_version","alias_value":"2101.09316v1","created_at":"2026-07-05T02:09:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.09316","created_at":"2026-07-05T02:09:17Z"},{"alias_kind":"pith_short_12","alias_value":"GVD2GQQSNMXQ","created_at":"2026-07-05T02:09:17Z"},{"alias_kind":"pith_short_16","alias_value":"GVD2GQQSNMXQKT4F","created_at":"2026-07-05T02:09:17Z"},{"alias_kind":"pith_short_8","alias_value":"GVD2GQQS","created_at":"2026-07-05T02:09:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:GVD2GQQSNMXQKT4FXVDA6P4KLQ","target":"record","payload":{"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"},"canonical_sha256":"3547a342126b2f054f85bd460f3f8a5c32cea78fb00385c432e53b3add808177","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"},"source_kind":"arxiv","source_id":"2101.09316","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:09:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3ZyR7SX8isJxJsQ2Nx4LSuHxASxFY2CwRBBIpNbaPEztgCuU+hMPCm7aR549Wha1Z5ihCzEL+2HZn6ANe1f8DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T10:24:48.868254Z"},"content_sha256":"01a98bdd541719170d6e23f839807bd74e35aa0b3edb0a15a194d7815d75e35a","schema_version":"1.0","event_id":"sha256:01a98bdd541719170d6e23f839807bd74e35aa0b3edb0a15a194d7815d75e35a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:GVD2GQQSNMXQKT4FXVDA6P4KLQ","target":"graph","payload":{"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:09:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XgeQ7OfO0m5DPAJBOIy3xUEXheyJ1eMywH1PuCcwSR+AAP1EfqTxASrhltPK3MmYfRhPriAZobOg1FZ7i3pbAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T10:24:48.869066Z"},"content_sha256":"6864926ea935e60928c675d69f715c4ae312cfee127e6a534e5e941eb5f32e75","schema_version":"1.0","event_id":"sha256:6864926ea935e60928c675d69f715c4ae312cfee127e6a534e5e941eb5f32e75"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ/bundle.json","state_url":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-08T10:24:48Z","links":{"resolver":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ","bundle":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ/bundle.json","state":"https://pith.science/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GVD2GQQSNMXQKT4FXVDA6P4KLQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:GVD2GQQSNMXQKT4FXVDA6P4KLQ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"e98c54c4f794d22fd579e5cabd822dcecced65f0851bd34becce20c055aac749","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-01-22T20:17:37Z","title_canon_sha256":"7b271bee7622428208373b1939a4094c9c61cce5d490a12bde8bb7f4e900697b"},"schema_version":"1.0","source":{"id":"2101.09316","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.09316","created_at":"2026-07-05T02:09:17Z"},{"alias_kind":"arxiv_version","alias_value":"2101.09316v1","created_at":"2026-07-05T02:09:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.09316","created_at":"2026-07-05T02:09:17Z"},{"alias_kind":"pith_short_12","alias_value":"GVD2GQQSNMXQ","created_at":"2026-07-05T02:09:17Z"},{"alias_kind":"pith_short_16","alias_value":"GVD2GQQSNMXQKT4F","created_at":"2026-07-05T02:09:17Z"},{"alias_kind":"pith_short_8","alias_value":"GVD2GQQS","created_at":"2026-07-05T02:09:17Z"}],"graph_snapshots":[{"event_id":"sha256:6864926ea935e60928c675d69f715c4ae312cfee127e6a534e5e941eb5f32e75","target":"graph","created_at":"2026-07-05T02:09:17Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2101.09316/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"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","authors_text":"Chiara Capecci, Francesco Benfenati, Guglielmo Mazzola, Ivano Tavernelli, Leonardo Guidoni, Panagiotis Kl. Barkoutsos, Pauline J. Ollitrault","cross_cats":["physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-01-22T20:17:37Z","title":"Improved accuracy on noisy devices by non-unitary Variational Quantum Eigensolver for chemistry applications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.09316","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:01a98bdd541719170d6e23f839807bd74e35aa0b3edb0a15a194d7815d75e35a","target":"record","created_at":"2026-07-05T02:09:17Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"e98c54c4f794d22fd579e5cabd822dcecced65f0851bd34becce20c055aac749","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-01-22T20:17:37Z","title_canon_sha256":"7b271bee7622428208373b1939a4094c9c61cce5d490a12bde8bb7f4e900697b"},"schema_version":"1.0","source":{"id":"2101.09316","kind":"arxiv","version":1}},"canonical_sha256":"3547a342126b2f054f85bd460f3f8a5c32cea78fb00385c432e53b3add808177","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3547a342126b2f054f85bd460f3f8a5c32cea78fb00385c432e53b3add808177","first_computed_at":"2026-07-05T02:09:17.618122Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:09:17.618122Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"y10Iy00D6PBZQjc0c5KFgAXOvNLniQplv07l5vWmEMFComxi0RCN1fXSIUOXN6QzfwE3SL93xa+J5NCy1txpBA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:09:17.618607Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.09316","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01a98bdd541719170d6e23f839807bd74e35aa0b3edb0a15a194d7815d75e35a","sha256:6864926ea935e60928c675d69f715c4ae312cfee127e6a534e5e941eb5f32e75"],"state_sha256":"d6faa6f7532951ea0c9d607927c938c87edb0d5f1a5a1f916fa1955b032bf4fb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4qK4iYnpSU+15wFs5t6nf36IZiuLq9oUw2GdxG5wfYCjH3CgAdtJoNi9cBiQQADIwAo0ik5oXipJj5F3n5IpAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T10:24:48.874972Z","bundle_sha256":"0824e1a5037704e0a56cbac9dc44b96ce5971f62a7ce2735769288a8c6d5eabd"}}