{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:A6LOIS2GVJ7HSY7JLGLFBM2NWW","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":"26a0ae40399887808f8a52701675f961d704c4601b2017022c99c276410589db","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-07-21T21:49:11Z","title_canon_sha256":"c239bc80581337ac2d3665a01798dcdd12bbbb7d069b53ec43ccd098a3eb654a"},"schema_version":"1.0","source":{"id":"1907.09040","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.09040","created_at":"2026-07-05T00:13:15Z"},{"alias_kind":"arxiv_version","alias_value":"1907.09040v2","created_at":"2026-07-05T00:13:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.09040","created_at":"2026-07-05T00:13:15Z"},{"alias_kind":"pith_short_12","alias_value":"A6LOIS2GVJ7H","created_at":"2026-07-05T00:13:15Z"},{"alias_kind":"pith_short_16","alias_value":"A6LOIS2GVJ7HSY7J","created_at":"2026-07-05T00:13:15Z"},{"alias_kind":"pith_short_8","alias_value":"A6LOIS2G","created_at":"2026-07-05T00:13:15Z"}],"graph_snapshots":[{"event_id":"sha256:487c3c8868d8391394d3eb3401ee9493631d8957c2248feb7f0b18440d5223a2","target":"graph","created_at":"2026-07-05T00:13:15Z","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/1907.09040/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"To obtain estimates of electronic energies, the Variational Quantum Eigensolver (VQE) technique performs separate measurements for multiple parts of the system Hamiltonian. Current quantum hardware is restricted to projective single-qubit measurements, and thus, only parts of the Hamiltonian which form mutually qubit-wise commuting groups can be measured simultaneously. The number of such groups in the electronic structure Hamiltonians grows as $N^4$, where $N$ is the number of qubits, and thus puts serious restrictions on the size of the systems that can be studied. Using a partitioning of th","authors_text":"Artur F. Izmaylov, Robert A. Lang, Tzu-Ching Yen, Vladyslav Verteletskyi","cross_cats":["physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-07-21T21:49:11Z","title":"Unitary partitioning approach to the measurement problem in the Variational Quantum Eigensolver method"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.09040","kind":"arxiv","version":2},"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":"sha256:87f35dffa802496fb076d2836e2ca999c5e5794759f79df1486166c1a4fdf6c4","target":"record","created_at":"2026-07-05T00:13:15Z","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":"26a0ae40399887808f8a52701675f961d704c4601b2017022c99c276410589db","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-07-21T21:49:11Z","title_canon_sha256":"c239bc80581337ac2d3665a01798dcdd12bbbb7d069b53ec43ccd098a3eb654a"},"schema_version":"1.0","source":{"id":"1907.09040","kind":"arxiv","version":2}},"canonical_sha256":"0796e44b46aa7e7963e9599650b34db58d1bf53bf95f8317e1f354875e8eaf5f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0796e44b46aa7e7963e9599650b34db58d1bf53bf95f8317e1f354875e8eaf5f","first_computed_at":"2026-07-05T00:13:15.799083Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:13:15.799083Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ebyRWJna/i4Dqo4KJdVelPg2T76YsXWO0CzVYb4sf1dNV15wxbXqVceK8OlPoEf5cYMC559hzG/hU0leGnfRCw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:13:15.799471Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.09040","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:87f35dffa802496fb076d2836e2ca999c5e5794759f79df1486166c1a4fdf6c4","sha256:487c3c8868d8391394d3eb3401ee9493631d8957c2248feb7f0b18440d5223a2"],"state_sha256":"fd809bafa7656b6f9f6b7990587d4891fe9e825854c650cceb7f31f23f596f98"}