{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VCHYM6AP5SQRRYV327TPJ23ZDI","short_pith_number":"pith:VCHYM6AP","canonical_record":{"source":{"id":"1804.05453","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-15T23:54:29Z","cross_cats_sorted":[],"title_canon_sha256":"b420f0ecc9c286c49d2422041f0ef17356248bf5db760f25558149750a09f689","abstract_canon_sha256":"1e7846d6a8fe66c11ce66a3971842f2b033cc65bae31a51b0910522464d20f28"},"schema_version":"1.0"},"canonical_sha256":"a88f86780feca118e2bbd7e6f4eb791a0b82e1f72b9b8a6fc71fa4523f12c8bd","source":{"kind":"arxiv","id":"1804.05453","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.05453","created_at":"2026-05-17T23:39:49Z"},{"alias_kind":"arxiv_version","alias_value":"1804.05453v3","created_at":"2026-05-17T23:39:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.05453","created_at":"2026-05-17T23:39:49Z"},{"alias_kind":"pith_short_12","alias_value":"VCHYM6AP5SQR","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VCHYM6AP5SQRRYV3","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VCHYM6AP","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VCHYM6AP5SQRRYV327TPJ23ZDI","target":"record","payload":{"canonical_record":{"source":{"id":"1804.05453","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-15T23:54:29Z","cross_cats_sorted":[],"title_canon_sha256":"b420f0ecc9c286c49d2422041f0ef17356248bf5db760f25558149750a09f689","abstract_canon_sha256":"1e7846d6a8fe66c11ce66a3971842f2b033cc65bae31a51b0910522464d20f28"},"schema_version":"1.0"},"canonical_sha256":"a88f86780feca118e2bbd7e6f4eb791a0b82e1f72b9b8a6fc71fa4523f12c8bd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:39:49.046920Z","signature_b64":"DOnp+DcFQEtb8jaHsd/O5GA8l+rrmMDZmeFZrjgwzsz8NpxkEbkzo9mcCq7j6irLV9lEIRO/NnS65pk+HUC9DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a88f86780feca118e2bbd7e6f4eb791a0b82e1f72b9b8a6fc71fa4523f12c8bd","last_reissued_at":"2026-05-17T23:39:49.046242Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:39:49.046242Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.05453","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:39:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fCYazdt69jEtV6WQNF16bMddiaOOS1wtIAPgSs2QkgWRCmxnAWzm7zLBqqT+H4fz2ArrODDOoWzJzJhjSEM4Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:22:10.512897Z"},"content_sha256":"e037594c95802d2fae49b431841dbb843cedd745a3486090e8c778725eaffcfb","schema_version":"1.0","event_id":"sha256:e037594c95802d2fae49b431841dbb843cedd745a3486090e8c778725eaffcfb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VCHYM6AP5SQRRYV327TPJ23ZDI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum computing methods for electronic states of the water molecule","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Ammar Daskin, Daniel Murphy, Rongxin Xia, Sabre Kais, Teng Bian","submitted_at":"2018-04-15T23:54:29Z","abstract_excerpt":"We compare recently proposed methods to compute the electronic state energies of the water molecule on a quantum computer. The methods include the phase estimation algorithm based on Trotter decomposition, the phase estimation algorithm based on the direct implementation of the Hamiltonian, direct measurement based on the implementation of the Hamiltonian and a specific variational quantum eigensolver, Pairwise VQE. After deriving the Hamiltonian using STO-3G basis, we first explain how each method works and then compare the simulation results in terms of gate complexity and the number of meas"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.05453","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-17T23:39:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wEvQpEpupzA+9JdtcF2xT7IdyLBQWDYy9jlDosF4eH8y5+5rHEhQx8zztvMDyo63H1WDJZr1v/0f2Eza5gYrDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:22:10.513599Z"},"content_sha256":"5de4918837fa3bac694198f2dcab9cd27982124d91e874cca8f734235bd37668","schema_version":"1.0","event_id":"sha256:5de4918837fa3bac694198f2dcab9cd27982124d91e874cca8f734235bd37668"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VCHYM6AP5SQRRYV327TPJ23ZDI/bundle.json","state_url":"https://pith.science/pith/VCHYM6AP5SQRRYV327TPJ23ZDI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VCHYM6AP5SQRRYV327TPJ23ZDI/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":"2026-05-25T15:22:10Z","links":{"resolver":"https://pith.science/pith/VCHYM6AP5SQRRYV327TPJ23ZDI","bundle":"https://pith.science/pith/VCHYM6AP5SQRRYV327TPJ23ZDI/bundle.json","state":"https://pith.science/pith/VCHYM6AP5SQRRYV327TPJ23ZDI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VCHYM6AP5SQRRYV327TPJ23ZDI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VCHYM6AP5SQRRYV327TPJ23ZDI","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":"1e7846d6a8fe66c11ce66a3971842f2b033cc65bae31a51b0910522464d20f28","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-15T23:54:29Z","title_canon_sha256":"b420f0ecc9c286c49d2422041f0ef17356248bf5db760f25558149750a09f689"},"schema_version":"1.0","source":{"id":"1804.05453","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.05453","created_at":"2026-05-17T23:39:49Z"},{"alias_kind":"arxiv_version","alias_value":"1804.05453v3","created_at":"2026-05-17T23:39:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.05453","created_at":"2026-05-17T23:39:49Z"},{"alias_kind":"pith_short_12","alias_value":"VCHYM6AP5SQR","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VCHYM6AP5SQRRYV3","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VCHYM6AP","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:5de4918837fa3bac694198f2dcab9cd27982124d91e874cca8f734235bd37668","target":"graph","created_at":"2026-05-17T23:39:49Z","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"},"paper":{"abstract_excerpt":"We compare recently proposed methods to compute the electronic state energies of the water molecule on a quantum computer. The methods include the phase estimation algorithm based on Trotter decomposition, the phase estimation algorithm based on the direct implementation of the Hamiltonian, direct measurement based on the implementation of the Hamiltonian and a specific variational quantum eigensolver, Pairwise VQE. After deriving the Hamiltonian using STO-3G basis, we first explain how each method works and then compare the simulation results in terms of gate complexity and the number of meas","authors_text":"Ammar Daskin, Daniel Murphy, Rongxin Xia, Sabre Kais, Teng Bian","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-15T23:54:29Z","title":"Quantum computing methods for electronic states of the water molecule"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.05453","kind":"arxiv","version":3},"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:e037594c95802d2fae49b431841dbb843cedd745a3486090e8c778725eaffcfb","target":"record","created_at":"2026-05-17T23:39:49Z","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":"1e7846d6a8fe66c11ce66a3971842f2b033cc65bae31a51b0910522464d20f28","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-15T23:54:29Z","title_canon_sha256":"b420f0ecc9c286c49d2422041f0ef17356248bf5db760f25558149750a09f689"},"schema_version":"1.0","source":{"id":"1804.05453","kind":"arxiv","version":3}},"canonical_sha256":"a88f86780feca118e2bbd7e6f4eb791a0b82e1f72b9b8a6fc71fa4523f12c8bd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a88f86780feca118e2bbd7e6f4eb791a0b82e1f72b9b8a6fc71fa4523f12c8bd","first_computed_at":"2026-05-17T23:39:49.046242Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:39:49.046242Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DOnp+DcFQEtb8jaHsd/O5GA8l+rrmMDZmeFZrjgwzsz8NpxkEbkzo9mcCq7j6irLV9lEIRO/NnS65pk+HUC9DA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:39:49.046920Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.05453","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e037594c95802d2fae49b431841dbb843cedd745a3486090e8c778725eaffcfb","sha256:5de4918837fa3bac694198f2dcab9cd27982124d91e874cca8f734235bd37668"],"state_sha256":"8327b0083c9a0e3d52d88d223e11bdfb1e7e034b740007c67284fd7286d850f7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cbDVmLKQWVEbxis2joy0CPpoOJ2x+nuVghFtsCxdniUPeBhtom/E0a72DQ3VSL2ewGRHOCYutq8YgAJ5+b5qBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T15:22:10.517131Z","bundle_sha256":"6856d4b241b52ee7214b0eb8791489ece95a714a18a65660207e54c1118720c4"}}