{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:WFPETRV76UNH5MYM5KY4JWX6EK","short_pith_number":"pith:WFPETRV7","canonical_record":{"source":{"id":"2002.05693","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-02-13T18:19:53Z","cross_cats_sorted":[],"title_canon_sha256":"212a7f734b610798cfde4528874f4dc8076020524507d9821322014cfb20bc52","abstract_canon_sha256":"d722f44234739fb8cd724590323bdd5c1d1cac972f6bd0f6de47100a62e9bc00"},"schema_version":"1.0"},"canonical_sha256":"b15e49c6bff51a7eb30ceab1c4dafe229b5e39ed00b81560016bd15083f1cfec","source":{"kind":"arxiv","id":"2002.05693","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.05693","created_at":"2026-07-05T01:37:53Z"},{"alias_kind":"arxiv_version","alias_value":"2002.05693v2","created_at":"2026-07-05T01:37:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.05693","created_at":"2026-07-05T01:37:53Z"},{"alias_kind":"pith_short_12","alias_value":"WFPETRV76UNH","created_at":"2026-07-05T01:37:53Z"},{"alias_kind":"pith_short_16","alias_value":"WFPETRV76UNH5MYM","created_at":"2026-07-05T01:37:53Z"},{"alias_kind":"pith_short_8","alias_value":"WFPETRV7","created_at":"2026-07-05T01:37:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:WFPETRV76UNH5MYM5KY4JWX6EK","target":"record","payload":{"canonical_record":{"source":{"id":"2002.05693","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-02-13T18:19:53Z","cross_cats_sorted":[],"title_canon_sha256":"212a7f734b610798cfde4528874f4dc8076020524507d9821322014cfb20bc52","abstract_canon_sha256":"d722f44234739fb8cd724590323bdd5c1d1cac972f6bd0f6de47100a62e9bc00"},"schema_version":"1.0"},"canonical_sha256":"b15e49c6bff51a7eb30ceab1c4dafe229b5e39ed00b81560016bd15083f1cfec","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:37:53.182048Z","signature_b64":"GK/6aKXL77IHrlyxixdHtCiIvulGSEELIvXbPuzw3yp1kKsybDvm7wTh0DzykpTwJk/bcHFKiWrI/On5xNf0Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b15e49c6bff51a7eb30ceab1c4dafe229b5e39ed00b81560016bd15083f1cfec","last_reissued_at":"2026-07-05T01:37:53.181696Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:37:53.181696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2002.05693","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:37:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gPq6oE7mt5a41jSpXZNZ8vSNWka8Vl5BbuKfdO0q0BxOivuCis3Hzan7QaTCNkmlH9elkamS0MemOB0bRvtlAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T07:11:55.079762Z"},"content_sha256":"9a7d71d0de097f2f9c97e58e2974e5140682e324fe23f8ac7f77b819b18b2beb","schema_version":"1.0","event_id":"sha256:9a7d71d0de097f2f9c97e58e2974e5140682e324fe23f8ac7f77b819b18b2beb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:WFPETRV76UNH5MYM5KY4JWX6EK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Classical Simulation of Noncontextual Pauli Hamiltonians","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Peter J. Love, William M. Kirby","submitted_at":"2020-02-13T18:19:53Z","abstract_excerpt":"Noncontextual Pauli Hamiltonians decompose into sets of Pauli terms to which joint values may be assigned without contradiction. We construct a quasi-quantized model for noncontextual Pauli Hamiltonians. Using this model, we give an algorithm to classically simulate noncontextual VQE. We also use the model to show that the noncontextual Hamiltonian problem is NP-complete. Finally, we explore the applicability of our quasi-quantized model as an approximate simulation tool for contextual Hamiltonians. These results support the notion of noncontextuality as classicality in near-term quantum algor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.05693","kind":"arxiv","version":2},"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/2002.05693/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":"2026-07-05T01:37:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c6l0fU3NrwWqD0egyQtR8O+tsPk1XgSxVPLo40cqARA9EiUk6AoRg46ZS6Dp+pbphM2VvA1oaH/yoSBMvHl7Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T07:11:55.080656Z"},"content_sha256":"89a18bf5926fb556ed4162cec4f24bd32b1c2edb79a4866dc418c16d79e1c7da","schema_version":"1.0","event_id":"sha256:89a18bf5926fb556ed4162cec4f24bd32b1c2edb79a4866dc418c16d79e1c7da"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WFPETRV76UNH5MYM5KY4JWX6EK/bundle.json","state_url":"https://pith.science/pith/WFPETRV76UNH5MYM5KY4JWX6EK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WFPETRV76UNH5MYM5KY4JWX6EK/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":"2026-08-18T07:11:55Z","links":{"resolver":"https://pith.science/pith/WFPETRV76UNH5MYM5KY4JWX6EK","bundle":"https://pith.science/pith/WFPETRV76UNH5MYM5KY4JWX6EK/bundle.json","state":"https://pith.science/pith/WFPETRV76UNH5MYM5KY4JWX6EK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WFPETRV76UNH5MYM5KY4JWX6EK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:WFPETRV76UNH5MYM5KY4JWX6EK","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":"d722f44234739fb8cd724590323bdd5c1d1cac972f6bd0f6de47100a62e9bc00","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-02-13T18:19:53Z","title_canon_sha256":"212a7f734b610798cfde4528874f4dc8076020524507d9821322014cfb20bc52"},"schema_version":"1.0","source":{"id":"2002.05693","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.05693","created_at":"2026-07-05T01:37:53Z"},{"alias_kind":"arxiv_version","alias_value":"2002.05693v2","created_at":"2026-07-05T01:37:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.05693","created_at":"2026-07-05T01:37:53Z"},{"alias_kind":"pith_short_12","alias_value":"WFPETRV76UNH","created_at":"2026-07-05T01:37:53Z"},{"alias_kind":"pith_short_16","alias_value":"WFPETRV76UNH5MYM","created_at":"2026-07-05T01:37:53Z"},{"alias_kind":"pith_short_8","alias_value":"WFPETRV7","created_at":"2026-07-05T01:37:53Z"}],"graph_snapshots":[{"event_id":"sha256:89a18bf5926fb556ed4162cec4f24bd32b1c2edb79a4866dc418c16d79e1c7da","target":"graph","created_at":"2026-07-05T01:37:53Z","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/2002.05693/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Noncontextual Pauli Hamiltonians decompose into sets of Pauli terms to which joint values may be assigned without contradiction. We construct a quasi-quantized model for noncontextual Pauli Hamiltonians. Using this model, we give an algorithm to classically simulate noncontextual VQE. We also use the model to show that the noncontextual Hamiltonian problem is NP-complete. Finally, we explore the applicability of our quasi-quantized model as an approximate simulation tool for contextual Hamiltonians. These results support the notion of noncontextuality as classicality in near-term quantum algor","authors_text":"Peter J. Love, William M. Kirby","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-02-13T18:19:53Z","title":"Classical Simulation of Noncontextual Pauli Hamiltonians"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.05693","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":"sha256:9a7d71d0de097f2f9c97e58e2974e5140682e324fe23f8ac7f77b819b18b2beb","target":"record","created_at":"2026-07-05T01:37:53Z","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":"d722f44234739fb8cd724590323bdd5c1d1cac972f6bd0f6de47100a62e9bc00","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-02-13T18:19:53Z","title_canon_sha256":"212a7f734b610798cfde4528874f4dc8076020524507d9821322014cfb20bc52"},"schema_version":"1.0","source":{"id":"2002.05693","kind":"arxiv","version":2}},"canonical_sha256":"b15e49c6bff51a7eb30ceab1c4dafe229b5e39ed00b81560016bd15083f1cfec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b15e49c6bff51a7eb30ceab1c4dafe229b5e39ed00b81560016bd15083f1cfec","first_computed_at":"2026-07-05T01:37:53.181696Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:37:53.181696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GK/6aKXL77IHrlyxixdHtCiIvulGSEELIvXbPuzw3yp1kKsybDvm7wTh0DzykpTwJk/bcHFKiWrI/On5xNf0Cw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:37:53.182048Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.05693","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9a7d71d0de097f2f9c97e58e2974e5140682e324fe23f8ac7f77b819b18b2beb","sha256:89a18bf5926fb556ed4162cec4f24bd32b1c2edb79a4866dc418c16d79e1c7da"],"state_sha256":"71348926c784d2a6fbab888b9ac7e6c02714e943b60f4efc27328d4513d424c2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"truAZ/EWRunBnzrr5eSFinHJ+eTtH1QjXmi7T9UTytAqFuSbuIP4PMTSjCi7bJ3wtBElHOotEUcYE7gEDErZAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T07:11:55.088725Z","bundle_sha256":"fb7b4bcc1e0048d46adaf86adeb7ff2cdb4e7652e7b860998fb8b633632b7707"}}