{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:VQ6WK2YFTC2FWAYN3ODYB7G4K3","short_pith_number":"pith:VQ6WK2YF","canonical_record":{"source":{"id":"2105.03836","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-09T05:10:59Z","cross_cats_sorted":["physics.chem-ph","physics.comp-ph"],"title_canon_sha256":"30c081478c2ca8290071c0ae605acbd4a6ce1152356d320f743503cb79e0c1b7","abstract_canon_sha256":"b39410b9634c0b8573e725098e05808206251630e4ea6fe65118d4fa3c45c9ce"},"schema_version":"1.0"},"canonical_sha256":"ac3d656b0598b45b030ddb8780fcdc56ebb9b7f6d4b7f4a4cc435aa58a042244","source":{"kind":"arxiv","id":"2105.03836","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.03836","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"arxiv_version","alias_value":"2105.03836v3","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.03836","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_12","alias_value":"VQ6WK2YFTC2F","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_16","alias_value":"VQ6WK2YFTC2FWAYN","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_8","alias_value":"VQ6WK2YF","created_at":"2026-07-05T04:12:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:VQ6WK2YFTC2FWAYN3ODYB7G4K3","target":"record","payload":{"canonical_record":{"source":{"id":"2105.03836","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-09T05:10:59Z","cross_cats_sorted":["physics.chem-ph","physics.comp-ph"],"title_canon_sha256":"30c081478c2ca8290071c0ae605acbd4a6ce1152356d320f743503cb79e0c1b7","abstract_canon_sha256":"b39410b9634c0b8573e725098e05808206251630e4ea6fe65118d4fa3c45c9ce"},"schema_version":"1.0"},"canonical_sha256":"ac3d656b0598b45b030ddb8780fcdc56ebb9b7f6d4b7f4a4cc435aa58a042244","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:12:01.547707Z","signature_b64":"rm+PQb69mcwK4s8SzheygblA8okif4OTNDafszMIyWkhOb0C4f4vnj0BoL3PkduUetvrmJP672HLY8fVVrtIAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac3d656b0598b45b030ddb8780fcdc56ebb9b7f6d4b7f4a4cc435aa58a042244","last_reissued_at":"2026-07-05T04:12:01.547249Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:12:01.547249Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.03836","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":"2026-07-05T04:12:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+NtuwUgB4/Ys4iQ/7gM+syQCtr7NEGdlcOBGxNOWneCXG265OTBDrkrYBPZg0SIVZNalWcR9gkW3fTRcKliIBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T01:33:04.952486Z"},"content_sha256":"a72407034cfdf44597e1d2a9f2a7f3a2f462f877357d4f74a80efbc2574b3ccf","schema_version":"1.0","event_id":"sha256:a72407034cfdf44597e1d2a9f2a7f3a2f462f877357d4f74a80efbc2574b3ccf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:VQ6WK2YFTC2FWAYN3ODYB7G4K3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimized Low-Depth Quantum Circuits for Molecular Electronic Structure using a Separable Pair Approximation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph","physics.comp-ph"],"primary_cat":"quant-ph","authors_text":"Al\\'an Aspuru-Guzik, Jakob S. Kottmann","submitted_at":"2021-05-09T05:10:59Z","abstract_excerpt":"We present a classically solvable model that leads to optimized low-depth quantum circuits leveraging separable pair approximations. The obtained circuits are well suited as a baseline circuit for emerging quantum hardware and can, in the long term, provide significantly improved initial states for quantum algorithms. The associated wavefunctions can be represented with linear memory requirement which allows classical optimization of the circuits and naturally defines a minimum benchmark for quantum algorithms. In this work, we employ directly determined pair-natural orbitals within a basis-se"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.03836","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2105.03836/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":"2026-07-05T04:12:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9CUDoOf2xNSgrQirmmGhEjEofbW6IqY21hZ6sgpvvzqRIewWs9xMGvHY18L/pLfdWzrtBxNDMQgpLyYvqoBvDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T01:33:04.952783Z"},"content_sha256":"eee9bb468bbebcb7152d8bfa8a7b4111e7d43649f074287ec617517a6fe1d3a9","schema_version":"1.0","event_id":"sha256:eee9bb468bbebcb7152d8bfa8a7b4111e7d43649f074287ec617517a6fe1d3a9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VQ6WK2YFTC2FWAYN3ODYB7G4K3/bundle.json","state_url":"https://pith.science/pith/VQ6WK2YFTC2FWAYN3ODYB7G4K3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VQ6WK2YFTC2FWAYN3ODYB7G4K3/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":"2026-08-01T01:33:04Z","links":{"resolver":"https://pith.science/pith/VQ6WK2YFTC2FWAYN3ODYB7G4K3","bundle":"https://pith.science/pith/VQ6WK2YFTC2FWAYN3ODYB7G4K3/bundle.json","state":"https://pith.science/pith/VQ6WK2YFTC2FWAYN3ODYB7G4K3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VQ6WK2YFTC2FWAYN3ODYB7G4K3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:VQ6WK2YFTC2FWAYN3ODYB7G4K3","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":"b39410b9634c0b8573e725098e05808206251630e4ea6fe65118d4fa3c45c9ce","cross_cats_sorted":["physics.chem-ph","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-09T05:10:59Z","title_canon_sha256":"30c081478c2ca8290071c0ae605acbd4a6ce1152356d320f743503cb79e0c1b7"},"schema_version":"1.0","source":{"id":"2105.03836","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.03836","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"arxiv_version","alias_value":"2105.03836v3","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.03836","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_12","alias_value":"VQ6WK2YFTC2F","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_16","alias_value":"VQ6WK2YFTC2FWAYN","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_8","alias_value":"VQ6WK2YF","created_at":"2026-07-05T04:12:01Z"}],"graph_snapshots":[{"event_id":"sha256:eee9bb468bbebcb7152d8bfa8a7b4111e7d43649f074287ec617517a6fe1d3a9","target":"graph","created_at":"2026-07-05T04:12:01Z","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/2105.03836/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a classically solvable model that leads to optimized low-depth quantum circuits leveraging separable pair approximations. The obtained circuits are well suited as a baseline circuit for emerging quantum hardware and can, in the long term, provide significantly improved initial states for quantum algorithms. The associated wavefunctions can be represented with linear memory requirement which allows classical optimization of the circuits and naturally defines a minimum benchmark for quantum algorithms. In this work, we employ directly determined pair-natural orbitals within a basis-se","authors_text":"Al\\'an Aspuru-Guzik, Jakob S. Kottmann","cross_cats":["physics.chem-ph","physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-09T05:10:59Z","title":"Optimized Low-Depth Quantum Circuits for Molecular Electronic Structure using a Separable Pair Approximation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.03836","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:a72407034cfdf44597e1d2a9f2a7f3a2f462f877357d4f74a80efbc2574b3ccf","target":"record","created_at":"2026-07-05T04:12:01Z","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":"b39410b9634c0b8573e725098e05808206251630e4ea6fe65118d4fa3c45c9ce","cross_cats_sorted":["physics.chem-ph","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-09T05:10:59Z","title_canon_sha256":"30c081478c2ca8290071c0ae605acbd4a6ce1152356d320f743503cb79e0c1b7"},"schema_version":"1.0","source":{"id":"2105.03836","kind":"arxiv","version":3}},"canonical_sha256":"ac3d656b0598b45b030ddb8780fcdc56ebb9b7f6d4b7f4a4cc435aa58a042244","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac3d656b0598b45b030ddb8780fcdc56ebb9b7f6d4b7f4a4cc435aa58a042244","first_computed_at":"2026-07-05T04:12:01.547249Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:12:01.547249Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rm+PQb69mcwK4s8SzheygblA8okif4OTNDafszMIyWkhOb0C4f4vnj0BoL3PkduUetvrmJP672HLY8fVVrtIAw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:12:01.547707Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.03836","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a72407034cfdf44597e1d2a9f2a7f3a2f462f877357d4f74a80efbc2574b3ccf","sha256:eee9bb468bbebcb7152d8bfa8a7b4111e7d43649f074287ec617517a6fe1d3a9"],"state_sha256":"a426e03fef64fa79ac9f8a74fca5b46c48c54855e57a9b91df08e0b79f6313c8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u1XHvT1yK7wQ3wVzv8Q0smdUIZDVkLEKvPCoZnfqoE5XoHtf/KirJYO/14gcmk7M7lXXNWJZ70ZOLTzz/nToDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T01:33:04.956148Z","bundle_sha256":"3944d598ab49542a4413071819467caa262257c477583c85aec277277fb0d545"}}