{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:W2RUYM3ANBECIXVKON32XBZ7QD","short_pith_number":"pith:W2RUYM3A","canonical_record":{"source":{"id":"2504.12893","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-04-17T12:34:33Z","cross_cats_sorted":[],"title_canon_sha256":"10ccaadcfc0a92b53a1769a132cf089084a2bd5c1fa0252c4e995bbff390c5db","abstract_canon_sha256":"bffcc1fa00988780ad4ef04c9f105c6acf16bebce173f9cfa7a446c016bc31ff"},"schema_version":"1.0"},"canonical_sha256":"b6a34c33606848245eaa7377ab873f80ea8375e62f464b2c4227fa72af651d04","source":{"kind":"arxiv","id":"2504.12893","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.12893","created_at":"2026-07-05T10:50:34Z"},{"alias_kind":"arxiv_version","alias_value":"2504.12893v1","created_at":"2026-07-05T10:50:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.12893","created_at":"2026-07-05T10:50:34Z"},{"alias_kind":"pith_short_12","alias_value":"W2RUYM3ANBEC","created_at":"2026-07-05T10:50:34Z"},{"alias_kind":"pith_short_16","alias_value":"W2RUYM3ANBECIXVK","created_at":"2026-07-05T10:50:34Z"},{"alias_kind":"pith_short_8","alias_value":"W2RUYM3A","created_at":"2026-07-05T10:50:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:W2RUYM3ANBECIXVKON32XBZ7QD","target":"record","payload":{"canonical_record":{"source":{"id":"2504.12893","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-04-17T12:34:33Z","cross_cats_sorted":[],"title_canon_sha256":"10ccaadcfc0a92b53a1769a132cf089084a2bd5c1fa0252c4e995bbff390c5db","abstract_canon_sha256":"bffcc1fa00988780ad4ef04c9f105c6acf16bebce173f9cfa7a446c016bc31ff"},"schema_version":"1.0"},"canonical_sha256":"b6a34c33606848245eaa7377ab873f80ea8375e62f464b2c4227fa72af651d04","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:50:34.437353Z","signature_b64":"HqNyh4mFNiBlrbHNjm/Ek1RZIIvFLOPqGeR/vyFPYlrv8+SxdjSp5qBijy6P/KC3h8P9ow+AEuJ8NbrePdmZBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b6a34c33606848245eaa7377ab873f80ea8375e62f464b2c4227fa72af651d04","last_reissued_at":"2026-07-05T10:50:34.436867Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:50:34.436867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.12893","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":"2026-07-05T10:50:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LmYHz5z9FwKt7movPO9nIzLkhfFGXF7wcx26Dls2uvxcQRBTqZdXjQ19npsEL0cIvo51AsYzlK8BUBZEniG6Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T08:23:01.760378Z"},"content_sha256":"0d3043fa36e5c9a828bc66b2a6c674d2940f5bb2ea8393d85d6c58d1fabb4fbb","schema_version":"1.0","event_id":"sha256:0d3043fa36e5c9a828bc66b2a6c674d2940f5bb2ea8393d85d6c58d1fabb4fbb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:W2RUYM3ANBECIXVKON32XBZ7QD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hardness of classically sampling quantum chemistry circuits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Ayoub Hafid, Hokuto Iwakiri, Kento Tsubouchi, Masaya Kohda, Nobuyuki Yoshioka","submitted_at":"2025-04-17T12:34:33Z","abstract_excerpt":"Significant advances have been made in the study of quantum advantage both in theory and experiment, although these have mostly been limited to artificial setups. In this work, we extend the scope to address quantum advantage in tasks relevant to chemistry and physics. Specifically, we consider the unitary cluster Jastrow (UCJ) ansatz-a variant of the unitary coupled cluster ansatz, which is widely used to solve the electronic structure problem on quantum computers-to show that sampling from the output distributions of quantum circuits implementing the UCJ ansatz is likely to be classically ha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.12893","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/2504.12893/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":"2026-07-05T10:50:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bqqvvOio4XgdTIjocZvk0J5ZWGimklyM+GAu9aozn5MZ6giE/a1uubtEz4vR0OdWxHMzKqP8BgHCKzqFdltQCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T08:23:01.760893Z"},"content_sha256":"c5d508d9213c0b216a024b7fb3d6ac035f5afa39858f6bc7b2ca36afbd36a67a","schema_version":"1.0","event_id":"sha256:c5d508d9213c0b216a024b7fb3d6ac035f5afa39858f6bc7b2ca36afbd36a67a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W2RUYM3ANBECIXVKON32XBZ7QD/bundle.json","state_url":"https://pith.science/pith/W2RUYM3ANBECIXVKON32XBZ7QD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W2RUYM3ANBECIXVKON32XBZ7QD/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":"2026-08-09T08:23:01Z","links":{"resolver":"https://pith.science/pith/W2RUYM3ANBECIXVKON32XBZ7QD","bundle":"https://pith.science/pith/W2RUYM3ANBECIXVKON32XBZ7QD/bundle.json","state":"https://pith.science/pith/W2RUYM3ANBECIXVKON32XBZ7QD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W2RUYM3ANBECIXVKON32XBZ7QD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:W2RUYM3ANBECIXVKON32XBZ7QD","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":"bffcc1fa00988780ad4ef04c9f105c6acf16bebce173f9cfa7a446c016bc31ff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-04-17T12:34:33Z","title_canon_sha256":"10ccaadcfc0a92b53a1769a132cf089084a2bd5c1fa0252c4e995bbff390c5db"},"schema_version":"1.0","source":{"id":"2504.12893","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.12893","created_at":"2026-07-05T10:50:34Z"},{"alias_kind":"arxiv_version","alias_value":"2504.12893v1","created_at":"2026-07-05T10:50:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.12893","created_at":"2026-07-05T10:50:34Z"},{"alias_kind":"pith_short_12","alias_value":"W2RUYM3ANBEC","created_at":"2026-07-05T10:50:34Z"},{"alias_kind":"pith_short_16","alias_value":"W2RUYM3ANBECIXVK","created_at":"2026-07-05T10:50:34Z"},{"alias_kind":"pith_short_8","alias_value":"W2RUYM3A","created_at":"2026-07-05T10:50:34Z"}],"graph_snapshots":[{"event_id":"sha256:c5d508d9213c0b216a024b7fb3d6ac035f5afa39858f6bc7b2ca36afbd36a67a","target":"graph","created_at":"2026-07-05T10:50:34Z","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/2504.12893/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Significant advances have been made in the study of quantum advantage both in theory and experiment, although these have mostly been limited to artificial setups. In this work, we extend the scope to address quantum advantage in tasks relevant to chemistry and physics. Specifically, we consider the unitary cluster Jastrow (UCJ) ansatz-a variant of the unitary coupled cluster ansatz, which is widely used to solve the electronic structure problem on quantum computers-to show that sampling from the output distributions of quantum circuits implementing the UCJ ansatz is likely to be classically ha","authors_text":"Ayoub Hafid, Hokuto Iwakiri, Kento Tsubouchi, Masaya Kohda, Nobuyuki Yoshioka","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-04-17T12:34:33Z","title":"Hardness of classically sampling quantum chemistry circuits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.12893","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":"sha256:0d3043fa36e5c9a828bc66b2a6c674d2940f5bb2ea8393d85d6c58d1fabb4fbb","target":"record","created_at":"2026-07-05T10:50:34Z","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":"bffcc1fa00988780ad4ef04c9f105c6acf16bebce173f9cfa7a446c016bc31ff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-04-17T12:34:33Z","title_canon_sha256":"10ccaadcfc0a92b53a1769a132cf089084a2bd5c1fa0252c4e995bbff390c5db"},"schema_version":"1.0","source":{"id":"2504.12893","kind":"arxiv","version":1}},"canonical_sha256":"b6a34c33606848245eaa7377ab873f80ea8375e62f464b2c4227fa72af651d04","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b6a34c33606848245eaa7377ab873f80ea8375e62f464b2c4227fa72af651d04","first_computed_at":"2026-07-05T10:50:34.436867Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:50:34.436867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HqNyh4mFNiBlrbHNjm/Ek1RZIIvFLOPqGeR/vyFPYlrv8+SxdjSp5qBijy6P/KC3h8P9ow+AEuJ8NbrePdmZBg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:50:34.437353Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.12893","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0d3043fa36e5c9a828bc66b2a6c674d2940f5bb2ea8393d85d6c58d1fabb4fbb","sha256:c5d508d9213c0b216a024b7fb3d6ac035f5afa39858f6bc7b2ca36afbd36a67a"],"state_sha256":"254718ca8839147a84fd32db477b7dcd091d07f26619092a990a26d79a5c3f49"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aoIQlpPvwHymLa9LJw5SQ4ylpaaLzF++rjA57FIdgeLpXWqH8WrgSKcqUFLLfv/BtIiqylmXBg5Krs1Q1H7NBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T08:23:01.765835Z","bundle_sha256":"ace6e1745b57a7a91ba8e8c3769a11f3d054abbbacf9b7c3c1e6fd5e13a1e6d0"}}