{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:M3TS6RVHH5IP62MLBRWJ3FIGNC","short_pith_number":"pith:M3TS6RVH","canonical_record":{"source":{"id":"1407.4800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2014-07-17T19:02:06Z","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.other","cond-mat.str-el","physics.chem-ph"],"title_canon_sha256":"9807bbbb27c0ea314cb1412ca101d8e1af3004d1e941ffb85d1dbf8d0d534030","abstract_canon_sha256":"a208cb44c332958e92d3d171aa4941dab92455154e5b3c3aaf5e3076bce9105f"},"schema_version":"1.0"},"canonical_sha256":"66e72f46a73f50ff698b0c6c9d950668814d0b784b19c31ccab81cf50daca241","source":{"kind":"arxiv","id":"1407.4800","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.4800","created_at":"2026-05-18T02:38:43Z"},{"alias_kind":"arxiv_version","alias_value":"1407.4800v1","created_at":"2026-05-18T02:38:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.4800","created_at":"2026-05-18T02:38:43Z"},{"alias_kind":"pith_short_12","alias_value":"M3TS6RVHH5IP","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"M3TS6RVHH5IP62ML","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"M3TS6RVH","created_at":"2026-05-18T12:28:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:M3TS6RVHH5IP62MLBRWJ3FIGNC","target":"record","payload":{"canonical_record":{"source":{"id":"1407.4800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2014-07-17T19:02:06Z","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.other","cond-mat.str-el","physics.chem-ph"],"title_canon_sha256":"9807bbbb27c0ea314cb1412ca101d8e1af3004d1e941ffb85d1dbf8d0d534030","abstract_canon_sha256":"a208cb44c332958e92d3d171aa4941dab92455154e5b3c3aaf5e3076bce9105f"},"schema_version":"1.0"},"canonical_sha256":"66e72f46a73f50ff698b0c6c9d950668814d0b784b19c31ccab81cf50daca241","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:38:43.829086Z","signature_b64":"klkHErxqZjd01CjjkFhGohjMHJtTldSK4aeul/1v8SrYtJs88+4R+qtfQdpDAF5cmnxmnk6kFAfr9+nCz+GuAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66e72f46a73f50ff698b0c6c9d950668814d0b784b19c31ccab81cf50daca241","last_reissued_at":"2026-05-18T02:38:43.828715Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:38:43.828715Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.4800","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":"2026-05-18T02:38:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h5juaAKNfqJx7yG+PyF0Fwmz3qRWTo/QgqD9SV+IqADIqXPEhkesowJ7D8wHUkimraQOU9MQnWm1k9izIBFRCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:22:18.232490Z"},"content_sha256":"0746964f4f2044f84c1f7f37c45db46446d6fec599e45869448cd7afd9c7a4b6","schema_version":"1.0","event_id":"sha256:0746964f4f2044f84c1f7f37c45db46446d6fec599e45869448cd7afd9c7a4b6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:M3TS6RVHH5IP62MLBRWJ3FIGNC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The sign problem in full configuration interaction quantum Monte Carlo: Linear and sub-linear representation regimes for the exact wave function","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","cond-mat.other","cond-mat.str-el","physics.chem-ph"],"primary_cat":"physics.comp-ph","authors_text":"Gustavo E. Scuseria, James J. Shepherd, James S. Spencer","submitted_at":"2014-07-17T19:02:06Z","abstract_excerpt":"We investigate the sign problem for full configuration interaction quantum Monte Carlo (FCIQMC), a stochastic algorithm for finding the ground state solution of the Schr\\\"odinger equation with substantially reduced computational cost compared with exact diagonalisation. We find $k$-space Hubbard models for which the solution is yielded with storage that grows sub-linearly in the size of the many-body Hilbert space, in spite of using a wave function that is simply linear combination of states. The FCIQMC algorithm is able to find this sub-linear scaling regime without bias and with only a choic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.4800","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":""},"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":"2026-05-18T02:38:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+wPCjNKhq5GL4pFPeS4+mrFX5MT4eeFu3cXeNFIqio1YXe2KY3orvy6f4zfJtYOafU+bnqopqAE9PE8xmShZDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:22:18.233156Z"},"content_sha256":"091f6af2f67f741385a8cdfbabd56b4f4b13afd2093135703f9e5d937b988975","schema_version":"1.0","event_id":"sha256:091f6af2f67f741385a8cdfbabd56b4f4b13afd2093135703f9e5d937b988975"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M3TS6RVHH5IP62MLBRWJ3FIGNC/bundle.json","state_url":"https://pith.science/pith/M3TS6RVHH5IP62MLBRWJ3FIGNC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M3TS6RVHH5IP62MLBRWJ3FIGNC/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":"2026-05-28T18:22:18Z","links":{"resolver":"https://pith.science/pith/M3TS6RVHH5IP62MLBRWJ3FIGNC","bundle":"https://pith.science/pith/M3TS6RVHH5IP62MLBRWJ3FIGNC/bundle.json","state":"https://pith.science/pith/M3TS6RVHH5IP62MLBRWJ3FIGNC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M3TS6RVHH5IP62MLBRWJ3FIGNC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:M3TS6RVHH5IP62MLBRWJ3FIGNC","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":"a208cb44c332958e92d3d171aa4941dab92455154e5b3c3aaf5e3076bce9105f","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.other","cond-mat.str-el","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2014-07-17T19:02:06Z","title_canon_sha256":"9807bbbb27c0ea314cb1412ca101d8e1af3004d1e941ffb85d1dbf8d0d534030"},"schema_version":"1.0","source":{"id":"1407.4800","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.4800","created_at":"2026-05-18T02:38:43Z"},{"alias_kind":"arxiv_version","alias_value":"1407.4800v1","created_at":"2026-05-18T02:38:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.4800","created_at":"2026-05-18T02:38:43Z"},{"alias_kind":"pith_short_12","alias_value":"M3TS6RVHH5IP","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"M3TS6RVHH5IP62ML","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"M3TS6RVH","created_at":"2026-05-18T12:28:38Z"}],"graph_snapshots":[{"event_id":"sha256:091f6af2f67f741385a8cdfbabd56b4f4b13afd2093135703f9e5d937b988975","target":"graph","created_at":"2026-05-18T02:38:43Z","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 investigate the sign problem for full configuration interaction quantum Monte Carlo (FCIQMC), a stochastic algorithm for finding the ground state solution of the Schr\\\"odinger equation with substantially reduced computational cost compared with exact diagonalisation. We find $k$-space Hubbard models for which the solution is yielded with storage that grows sub-linearly in the size of the many-body Hilbert space, in spite of using a wave function that is simply linear combination of states. The FCIQMC algorithm is able to find this sub-linear scaling regime without bias and with only a choic","authors_text":"Gustavo E. Scuseria, James J. Shepherd, James S. Spencer","cross_cats":["cond-mat.mtrl-sci","cond-mat.other","cond-mat.str-el","physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2014-07-17T19:02:06Z","title":"The sign problem in full configuration interaction quantum Monte Carlo: Linear and sub-linear representation regimes for the exact wave function"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.4800","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":"sha256:0746964f4f2044f84c1f7f37c45db46446d6fec599e45869448cd7afd9c7a4b6","target":"record","created_at":"2026-05-18T02:38:43Z","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":"a208cb44c332958e92d3d171aa4941dab92455154e5b3c3aaf5e3076bce9105f","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.other","cond-mat.str-el","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2014-07-17T19:02:06Z","title_canon_sha256":"9807bbbb27c0ea314cb1412ca101d8e1af3004d1e941ffb85d1dbf8d0d534030"},"schema_version":"1.0","source":{"id":"1407.4800","kind":"arxiv","version":1}},"canonical_sha256":"66e72f46a73f50ff698b0c6c9d950668814d0b784b19c31ccab81cf50daca241","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66e72f46a73f50ff698b0c6c9d950668814d0b784b19c31ccab81cf50daca241","first_computed_at":"2026-05-18T02:38:43.828715Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:38:43.828715Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"klkHErxqZjd01CjjkFhGohjMHJtTldSK4aeul/1v8SrYtJs88+4R+qtfQdpDAF5cmnxmnk6kFAfr9+nCz+GuAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:38:43.829086Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.4800","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0746964f4f2044f84c1f7f37c45db46446d6fec599e45869448cd7afd9c7a4b6","sha256:091f6af2f67f741385a8cdfbabd56b4f4b13afd2093135703f9e5d937b988975"],"state_sha256":"d23aa144189d46665f6fbb8827da4c8cac9008be27057d3293868d5f3f47ad19"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1oNPmd4NvaBbRW2Kf0jqqdpiS+Wprbxj1QZKW4FZghCQsXlVwwfu5d2THDSO+OXAYCth/mmbAQNzST6FKmHhDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T18:22:18.236699Z","bundle_sha256":"2b2705e62aca5cfa4db432af0559060059b8ff6da86960f84203f0027019a8cb"}}