{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:KJJNVF7JAVXO3M7NTLYLQLZWKY","short_pith_number":"pith:KJJNVF7J","schema_version":"1.0","canonical_sha256":"5252da97e9056eedb3ed9af0b82f36562c32b8a7ded03e1c6173eac9876780b5","source":{"kind":"arxiv","id":"1308.1393","version":1},"attestation_state":"computed","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"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"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"},"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"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1308.1393","created_at":"2026-05-18T03:07:03.642252+00:00"},{"alias_kind":"arxiv_version","alias_value":"1308.1393v1","created_at":"2026-05-18T03:07:03.642252+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.1393","created_at":"2026-05-18T03:07:03.642252+00:00"},{"alias_kind":"pith_short_12","alias_value":"KJJNVF7JAVXO","created_at":"2026-05-18T12:27:49.015174+00:00"},{"alias_kind":"pith_short_16","alias_value":"KJJNVF7JAVXO3M7N","created_at":"2026-05-18T12:27:49.015174+00:00"},{"alias_kind":"pith_short_8","alias_value":"KJJNVF7J","created_at":"2026-05-18T12:27:49.015174+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY","json":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY.json","graph_json":"https://pith.science/api/pith-number/KJJNVF7JAVXO3M7NTLYLQLZWKY/graph.json","events_json":"https://pith.science/api/pith-number/KJJNVF7JAVXO3M7NTLYLQLZWKY/events.json","paper":"https://pith.science/paper/KJJNVF7J"},"agent_actions":{"view_html":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY","download_json":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY.json","view_paper":"https://pith.science/paper/KJJNVF7J","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1308.1393&json=true","fetch_graph":"https://pith.science/api/pith-number/KJJNVF7JAVXO3M7NTLYLQLZWKY/graph.json","fetch_events":"https://pith.science/api/pith-number/KJJNVF7JAVXO3M7NTLYLQLZWKY/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY/action/storage_attestation","attest_author":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY/action/author_attestation","sign_citation":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY/action/citation_signature","submit_replication":"https://pith.science/pith/KJJNVF7JAVXO3M7NTLYLQLZWKY/action/replication_record"}},"created_at":"2026-05-18T03:07:03.642252+00:00","updated_at":"2026-05-18T03:07:03.642252+00:00"}