{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:P5VSIS7JDKHZUF2QHJ7O7BHVEX","short_pith_number":"pith:P5VSIS7J","canonical_record":{"source":{"id":"2009.01029","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2020-09-02T12:57:30Z","cross_cats_sorted":[],"title_canon_sha256":"87949af1b4b1fa5d3826e2e3fe2ed06eb0932d4ae2d1be8465701d3405767b8c","abstract_canon_sha256":"5f956124fd4eac4e980421d52ba2182fb5aaf51baf7634e9eb218a88bd4950d6"},"schema_version":"1.0"},"canonical_sha256":"7f6b244be91a8f9a17503a7eef84f525d03048b991c4b22a1c5eb783b7e4eed5","source":{"kind":"arxiv","id":"2009.01029","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.01029","created_at":"2026-07-05T02:09:46Z"},{"alias_kind":"arxiv_version","alias_value":"2009.01029v1","created_at":"2026-07-05T02:09:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.01029","created_at":"2026-07-05T02:09:46Z"},{"alias_kind":"pith_short_12","alias_value":"P5VSIS7JDKHZ","created_at":"2026-07-05T02:09:46Z"},{"alias_kind":"pith_short_16","alias_value":"P5VSIS7JDKHZUF2Q","created_at":"2026-07-05T02:09:46Z"},{"alias_kind":"pith_short_8","alias_value":"P5VSIS7J","created_at":"2026-07-05T02:09:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:P5VSIS7JDKHZUF2QHJ7O7BHVEX","target":"record","payload":{"canonical_record":{"source":{"id":"2009.01029","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2020-09-02T12:57:30Z","cross_cats_sorted":[],"title_canon_sha256":"87949af1b4b1fa5d3826e2e3fe2ed06eb0932d4ae2d1be8465701d3405767b8c","abstract_canon_sha256":"5f956124fd4eac4e980421d52ba2182fb5aaf51baf7634e9eb218a88bd4950d6"},"schema_version":"1.0"},"canonical_sha256":"7f6b244be91a8f9a17503a7eef84f525d03048b991c4b22a1c5eb783b7e4eed5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:09:46.217499Z","signature_b64":"cf5/Gmk+tDtgQ6N4F2XiiTEIsjA/G+vxOy0EV6y7ca5JtzpXBqEvaNcbZUT6fjQNoX+7MOFetqZSSn1BUQs0Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7f6b244be91a8f9a17503a7eef84f525d03048b991c4b22a1c5eb783b7e4eed5","last_reissued_at":"2026-07-05T02:09:46.217086Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:09:46.217086Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.01029","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":"2026-07-05T02:09:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q/gboo2PKt0ZAPZ6MgGEvwmdt8IvWfv6X+ENEqSGJn6oSGze9dHNAULU3Vkjh5AcNLEUIjrn4HzOyAPTpb2RAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T23:01:48.354750Z"},"content_sha256":"340b7fcce78d51af99001dccb21194e53a41ca3b6e2edcbc8c7a28b189ccc92e","schema_version":"1.0","event_id":"sha256:340b7fcce78d51af99001dccb21194e53a41ca3b6e2edcbc8c7a28b189ccc92e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:P5VSIS7JDKHZUF2QHJ7O7BHVEX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Field sparsening for the construction of the correlation functions in lattice QCD","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"Chuan Liu, Lu-Chang Jin, Shi-Cheng Xia, Xu Feng, Yuan Li","submitted_at":"2020-09-02T12:57:30Z","abstract_excerpt":"Two field-sparsening methods, namely the sparse-grid method and the random field selection method, are used in this paper for the construction of the 2-point and 3-point correlation functions in lattice QCD. We argue that, due to the high correlation among the lattice correlators at different field points associated with source, current, and sink locations, one can save a lot of computational time by performing the summation over a subset of the lattice sites. Furthermore, with this strategy, one only needs to store a small fraction of the full quark propagators. It is found that the number of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.01029","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/2009.01029/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":"2026-07-05T02:09:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8dzRDkz0KTB5rJvjz71DWfHGqWBt+amOFNdg3PgSJGYPWw/9u5A8Wk602W2IaoMwIhL2UnsDn6lbX+pOhhkeCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T23:01:48.355704Z"},"content_sha256":"c8b515d02134e9677f10ca3e6c6db09bf5aae06c0a43b4a026579ae7ab9c107c","schema_version":"1.0","event_id":"sha256:c8b515d02134e9677f10ca3e6c6db09bf5aae06c0a43b4a026579ae7ab9c107c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P5VSIS7JDKHZUF2QHJ7O7BHVEX/bundle.json","state_url":"https://pith.science/pith/P5VSIS7JDKHZUF2QHJ7O7BHVEX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P5VSIS7JDKHZUF2QHJ7O7BHVEX/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":"2026-08-15T23:01:48Z","links":{"resolver":"https://pith.science/pith/P5VSIS7JDKHZUF2QHJ7O7BHVEX","bundle":"https://pith.science/pith/P5VSIS7JDKHZUF2QHJ7O7BHVEX/bundle.json","state":"https://pith.science/pith/P5VSIS7JDKHZUF2QHJ7O7BHVEX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P5VSIS7JDKHZUF2QHJ7O7BHVEX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:P5VSIS7JDKHZUF2QHJ7O7BHVEX","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":"5f956124fd4eac4e980421d52ba2182fb5aaf51baf7634e9eb218a88bd4950d6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2020-09-02T12:57:30Z","title_canon_sha256":"87949af1b4b1fa5d3826e2e3fe2ed06eb0932d4ae2d1be8465701d3405767b8c"},"schema_version":"1.0","source":{"id":"2009.01029","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.01029","created_at":"2026-07-05T02:09:46Z"},{"alias_kind":"arxiv_version","alias_value":"2009.01029v1","created_at":"2026-07-05T02:09:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.01029","created_at":"2026-07-05T02:09:46Z"},{"alias_kind":"pith_short_12","alias_value":"P5VSIS7JDKHZ","created_at":"2026-07-05T02:09:46Z"},{"alias_kind":"pith_short_16","alias_value":"P5VSIS7JDKHZUF2Q","created_at":"2026-07-05T02:09:46Z"},{"alias_kind":"pith_short_8","alias_value":"P5VSIS7J","created_at":"2026-07-05T02:09:46Z"}],"graph_snapshots":[{"event_id":"sha256:c8b515d02134e9677f10ca3e6c6db09bf5aae06c0a43b4a026579ae7ab9c107c","target":"graph","created_at":"2026-07-05T02:09:46Z","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/2009.01029/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Two field-sparsening methods, namely the sparse-grid method and the random field selection method, are used in this paper for the construction of the 2-point and 3-point correlation functions in lattice QCD. We argue that, due to the high correlation among the lattice correlators at different field points associated with source, current, and sink locations, one can save a lot of computational time by performing the summation over a subset of the lattice sites. Furthermore, with this strategy, one only needs to store a small fraction of the full quark propagators. It is found that the number of","authors_text":"Chuan Liu, Lu-Chang Jin, Shi-Cheng Xia, Xu Feng, Yuan Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2020-09-02T12:57:30Z","title":"Field sparsening for the construction of the correlation functions in lattice QCD"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.01029","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":"sha256:340b7fcce78d51af99001dccb21194e53a41ca3b6e2edcbc8c7a28b189ccc92e","target":"record","created_at":"2026-07-05T02:09:46Z","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":"5f956124fd4eac4e980421d52ba2182fb5aaf51baf7634e9eb218a88bd4950d6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2020-09-02T12:57:30Z","title_canon_sha256":"87949af1b4b1fa5d3826e2e3fe2ed06eb0932d4ae2d1be8465701d3405767b8c"},"schema_version":"1.0","source":{"id":"2009.01029","kind":"arxiv","version":1}},"canonical_sha256":"7f6b244be91a8f9a17503a7eef84f525d03048b991c4b22a1c5eb783b7e4eed5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7f6b244be91a8f9a17503a7eef84f525d03048b991c4b22a1c5eb783b7e4eed5","first_computed_at":"2026-07-05T02:09:46.217086Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:09:46.217086Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cf5/Gmk+tDtgQ6N4F2XiiTEIsjA/G+vxOy0EV6y7ca5JtzpXBqEvaNcbZUT6fjQNoX+7MOFetqZSSn1BUQs0Cw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:09:46.217499Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.01029","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:340b7fcce78d51af99001dccb21194e53a41ca3b6e2edcbc8c7a28b189ccc92e","sha256:c8b515d02134e9677f10ca3e6c6db09bf5aae06c0a43b4a026579ae7ab9c107c"],"state_sha256":"3c9df9e6345f500dfb44f309bb79f4bf6b2c99a8ab5f34343a1777d777cbd91b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WcFlDeZJFPWLjfeSr35z8Ze4mR1Ml4FxuEzaaeNfx5XMppK4EP/HLR57AdW2b7/NrXOKPKHMy7+HapU2DQA0AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T23:01:48.361997Z","bundle_sha256":"dc1d0ecb8e31a5f1f6e6e43c4d027e1697472d59b28cbef457f5b7c7240909aa"}}