{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:BZ6PUPKKWEOWBFRVFK2LBE4HPZ","short_pith_number":"pith:BZ6PUPKK","schema_version":"1.0","canonical_sha256":"0e7cfa3d4ab11d6096352ab4b093877e636419a726a3148769eb7ef7a2d32685","source":{"kind":"arxiv","id":"1906.05236","version":1},"attestation_state":"computed","paper":{"title":"Many-body effects in porphyrin-like transition metal complexes embedded in graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Adrian E. Feiguin, Andrew Allerdt, Arun Bansil, Bernardo Barbiellini, Hasnain Hafiz","submitted_at":"2019-06-12T16:11:54Z","abstract_excerpt":"We introduce a new computational method to study porphyrin-like transition metal complexes, bridging density functional theory and exact many-body techniques, such as the density matrix renormalization group (DMRG). We first derive a multi-orbital Anderson impurity Hamiltonian starting from first principles considerations that qualitatively reproduce GGA+U results when ignoring inter-orbital Coulomb repulsion $U'$ and Hund exchange $J$. An exact canonical transformation is used to reduce the dimensionality of the problem and make it amenable to DMRG calculations, including all many-body terms "},"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":"1906.05236","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-06-12T16:11:54Z","cross_cats_sorted":[],"title_canon_sha256":"e84ecb5315d8ff91b46ba62f03a223f8873ac0c0dd2b5756ebf20a9c6571c724","abstract_canon_sha256":"3025285a6b4eb59065d265e5db3382ec756440c389b33819810c86a6a8b84537"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:29.093643Z","signature_b64":"rDppyTm7uQpU91DuGy4HOHKAMJgUsyKIOiK6TIqad/ENHDpa/7axFWnzMHN31pUMsbCr/tI9XujdSYC/wjiuDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0e7cfa3d4ab11d6096352ab4b093877e636419a726a3148769eb7ef7a2d32685","last_reissued_at":"2026-05-17T23:43:29.092933Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:29.092933Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Many-body effects in porphyrin-like transition metal complexes embedded in graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Adrian E. Feiguin, Andrew Allerdt, Arun Bansil, Bernardo Barbiellini, Hasnain Hafiz","submitted_at":"2019-06-12T16:11:54Z","abstract_excerpt":"We introduce a new computational method to study porphyrin-like transition metal complexes, bridging density functional theory and exact many-body techniques, such as the density matrix renormalization group (DMRG). We first derive a multi-orbital Anderson impurity Hamiltonian starting from first principles considerations that qualitatively reproduce GGA+U results when ignoring inter-orbital Coulomb repulsion $U'$ and Hund exchange $J$. An exact canonical transformation is used to reduce the dimensionality of the problem and make it amenable to DMRG calculations, including all many-body terms "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.05236","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":"1906.05236","created_at":"2026-05-17T23:43:29.093040+00:00"},{"alias_kind":"arxiv_version","alias_value":"1906.05236v1","created_at":"2026-05-17T23:43:29.093040+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.05236","created_at":"2026-05-17T23:43:29.093040+00:00"},{"alias_kind":"pith_short_12","alias_value":"BZ6PUPKKWEOW","created_at":"2026-05-18T12:33:12.712433+00:00"},{"alias_kind":"pith_short_16","alias_value":"BZ6PUPKKWEOWBFRV","created_at":"2026-05-18T12:33:12.712433+00:00"},{"alias_kind":"pith_short_8","alias_value":"BZ6PUPKK","created_at":"2026-05-18T12:33:12.712433+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/BZ6PUPKKWEOWBFRVFK2LBE4HPZ","json":"https://pith.science/pith/BZ6PUPKKWEOWBFRVFK2LBE4HPZ.json","graph_json":"https://pith.science/api/pith-number/BZ6PUPKKWEOWBFRVFK2LBE4HPZ/graph.json","events_json":"https://pith.science/api/pith-number/BZ6PUPKKWEOWBFRVFK2LBE4HPZ/events.json","paper":"https://pith.science/paper/BZ6PUPKK"},"agent_actions":{"view_html":"https://pith.science/pith/BZ6PUPKKWEOWBFRVFK2LBE4HPZ","download_json":"https://pith.science/pith/BZ6PUPKKWEOWBFRVFK2LBE4HPZ.json","view_paper":"https://pith.science/paper/BZ6PUPKK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1906.05236&json=true","fetch_graph":"https://pith.science/api/pith-number/BZ6PUPKKWEOWBFRVFK2LBE4HPZ/graph.json","fetch_events":"https://pith.science/api/pith-number/BZ6PUPKKWEOWBFRVFK2LBE4HPZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/BZ6PUPKKWEOWBFRVFK2LBE4HPZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/BZ6PUPKKWEOWBFRVFK2LBE4HPZ/action/storage_attestation","attest_author":"https://pith.science/pith/BZ6PUPKKWEOWBFRVFK2LBE4HPZ/action/author_attestation","sign_citation":"https://pith.science/pith/BZ6PUPKKWEOWBFRVFK2LBE4HPZ/action/citation_signature","submit_replication":"https://pith.science/pith/BZ6PUPKKWEOWBFRVFK2LBE4HPZ/action/replication_record"}},"created_at":"2026-05-17T23:43:29.093040+00:00","updated_at":"2026-05-17T23:43:29.093040+00:00"}