{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:KJJNVF7JAVXO3M7NTLYLQLZWKY","short_pith_number":"pith:KJJNVF7J","canonical_record":{"source":{"id":"1308.1393","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2013-08-06T19:59:02Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"24d3ac3dd3a69b53ccc4573358ad5e7963dbdc58cbc42401b1d46cdb0e7c9251","abstract_canon_sha256":"a85171a1c0038ec581339720f2342909ab5841c53f3b9c84ef583404e434fae9"},"schema_version":"1.0"},"canonical_sha256":"5252da97e9056eedb3ed9af0b82f36562c32b8a7ded03e1c6173eac9876780b5","source":{"kind":"arxiv","id":"1308.1393","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.1393","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"arxiv_version","alias_value":"1308.1393v1","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.1393","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"pith_short_12","alias_value":"KJJNVF7JAVXO","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"KJJNVF7JAVXO3M7N","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"KJJNVF7J","created_at":"2026-05-18T12:27:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:KJJNVF7JAVXO3M7NTLYLQLZWKY","target":"record","payload":{"canonical_record":{"source":{"id":"1308.1393","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2013-08-06T19:59:02Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"24d3ac3dd3a69b53ccc4573358ad5e7963dbdc58cbc42401b1d46cdb0e7c9251","abstract_canon_sha256":"a85171a1c0038ec581339720f2342909ab5841c53f3b9c84ef583404e434fae9"},"schema_version":"1.0"},"canonical_sha256":"5252da97e9056eedb3ed9af0b82f36562c32b8a7ded03e1c6173eac9876780b5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:07:03.642633Z","signature_b64":"DuZNvkMJUNYdMAMULDl6zArYlnA3kthwXDcgJ8gaV3nD8rd0kakXHuIKcNzWBa4jLyjBuB3dsmqV2Ja3FloxDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5252da97e9056eedb3ed9af0b82f36562c32b8a7ded03e1c6173eac9876780b5","last_reissued_at":"2026-05-18T03:07:03.642179Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:07:03.642179Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.1393","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":"2026-05-18T03:07:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M36Q6a6V4M9nwf34rWYQx/BiKQIJdlvW0z/TZsvoKZk2EjFSX3OKFUHZRbAfsseeh9hglT2zb0V73LjtbiKdCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T17:49:08.526299Z"},"content_sha256":"0b5d9294b7c6997ba0be2824474e210b14bbdcacbffc817022f844e1daf6eda8","schema_version":"1.0","event_id":"sha256:0b5d9294b7c6997ba0be2824474e210b14bbdcacbffc817022f844e1daf6eda8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:KJJNVF7JAVXO3M7NTLYLQLZWKY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Frozen-orbital and downfolding calculations with auxiliary-field quantum Monte Carlo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"physics.comp-ph","authors_text":"Henry Krakauer, Shiwei Zhang, Wirawan Purwanto","submitted_at":"2013-08-06T19:59:02Z","abstract_excerpt":"We describe the implementation of the frozen-orbital and downfolding approximations in the auxiliary-field quantum Monte Carlo (AFQMC) method. These approaches can provide significant computational savings compared to fully correlating all the electrons. While the many-body wave function is never explicit in AFQMC, its random walkers are Slater determinants, whose orbitals may be expressed in terms of any one-particle orbital basis. It is therefore straightforward to partition the full N-particle Hilbert space into active and inactive parts to implement the frozen-orbital method. In the frozen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.1393","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":"2026-05-18T03:07:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qp2P2dPJaBoh8tL7JZkV9WtoErc/bDVnPQY7K3Y0R1d45E5yJLr2aZkqbgHv9FZgfUtENImKGvQaK56wESg4AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T17:49:08.526929Z"},"content_sha256":"9d4aab9b71f118c62d03b9126943dfc4ffb6247e44c3a18c62aaf539729f2183","schema_version":"1.0","event_id":"sha256:9d4aab9b71f118c62d03b9126943dfc4ffb6247e44c3a18c62aaf539729f2183"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY/bundle.json","state_url":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY/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":"2026-05-28T17:49:08Z","links":{"resolver":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY","bundle":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY/bundle.json","state":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:KJJNVF7JAVXO3M7NTLYLQLZWKY","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":"a85171a1c0038ec581339720f2342909ab5841c53f3b9c84ef583404e434fae9","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2013-08-06T19:59:02Z","title_canon_sha256":"24d3ac3dd3a69b53ccc4573358ad5e7963dbdc58cbc42401b1d46cdb0e7c9251"},"schema_version":"1.0","source":{"id":"1308.1393","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.1393","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"arxiv_version","alias_value":"1308.1393v1","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.1393","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"pith_short_12","alias_value":"KJJNVF7JAVXO","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"KJJNVF7JAVXO3M7N","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"KJJNVF7J","created_at":"2026-05-18T12:27:49Z"}],"graph_snapshots":[{"event_id":"sha256:9d4aab9b71f118c62d03b9126943dfc4ffb6247e44c3a18c62aaf539729f2183","target":"graph","created_at":"2026-05-18T03:07:03Z","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 describe the implementation of the frozen-orbital and downfolding approximations in the auxiliary-field quantum Monte Carlo (AFQMC) method. These approaches can provide significant computational savings compared to fully correlating all the electrons. While the many-body wave function is never explicit in AFQMC, its random walkers are Slater determinants, whose orbitals may be expressed in terms of any one-particle orbital basis. It is therefore straightforward to partition the full N-particle Hilbert space into active and inactive parts to implement the frozen-orbital method. In the frozen","authors_text":"Henry Krakauer, Shiwei Zhang, Wirawan Purwanto","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2013-08-06T19:59:02Z","title":"Frozen-orbital and downfolding calculations with auxiliary-field quantum Monte Carlo"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.1393","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":"sha256:0b5d9294b7c6997ba0be2824474e210b14bbdcacbffc817022f844e1daf6eda8","target":"record","created_at":"2026-05-18T03:07:03Z","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":"a85171a1c0038ec581339720f2342909ab5841c53f3b9c84ef583404e434fae9","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2013-08-06T19:59:02Z","title_canon_sha256":"24d3ac3dd3a69b53ccc4573358ad5e7963dbdc58cbc42401b1d46cdb0e7c9251"},"schema_version":"1.0","source":{"id":"1308.1393","kind":"arxiv","version":1}},"canonical_sha256":"5252da97e9056eedb3ed9af0b82f36562c32b8a7ded03e1c6173eac9876780b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5252da97e9056eedb3ed9af0b82f36562c32b8a7ded03e1c6173eac9876780b5","first_computed_at":"2026-05-18T03:07:03.642179Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:07:03.642179Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DuZNvkMJUNYdMAMULDl6zArYlnA3kthwXDcgJ8gaV3nD8rd0kakXHuIKcNzWBa4jLyjBuB3dsmqV2Ja3FloxDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:07:03.642633Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.1393","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0b5d9294b7c6997ba0be2824474e210b14bbdcacbffc817022f844e1daf6eda8","sha256:9d4aab9b71f118c62d03b9126943dfc4ffb6247e44c3a18c62aaf539729f2183"],"state_sha256":"2397d221b151a872d9225dbfa52a7f33492f4b5ce261a9280dfb30aacbdd54d8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"42K+wAdQaCfb1uuVf520nPQqruuGlSHaKsfK7w9Kt+LpwGHxK2WOQ94k6TmUnicLQrgfF46Sg0cmsw4QqhxYDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T17:49:08.530563Z","bundle_sha256":"64663523e7c6bbe4a2e900e5ddd1947d6b9809e12f708a5a90f7a34160ea6d4a"}}