{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:M3NX346RVHNARCBEMYMGEMHROA","short_pith_number":"pith:M3NX346R","canonical_record":{"source":{"id":"1803.04234","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-03-12T13:12:56Z","cross_cats_sorted":["cond-mat.other","cond-mat.str-el","physics.comp-ph"],"title_canon_sha256":"1bd926d47a3d55cbd1a0d7ab0e1e3be8ccae4e888364f1d9175c0ec845e40f28","abstract_canon_sha256":"bfcfa4f4baa6ac084e4efbfd8c247199f8361755c698748e7547669588e32c1e"},"schema_version":"1.0"},"canonical_sha256":"66db7df3d1a9da08882466186230f1700c766c8cd90b69135702df44c29a7a13","source":{"kind":"arxiv","id":"1803.04234","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.04234","created_at":"2026-05-18T00:10:16Z"},{"alias_kind":"arxiv_version","alias_value":"1803.04234v1","created_at":"2026-05-18T00:10:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.04234","created_at":"2026-05-18T00:10:16Z"},{"alias_kind":"pith_short_12","alias_value":"M3NX346RVHNA","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"M3NX346RVHNARCBE","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"M3NX346R","created_at":"2026-05-18T12:32:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:M3NX346RVHNARCBEMYMGEMHROA","target":"record","payload":{"canonical_record":{"source":{"id":"1803.04234","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-03-12T13:12:56Z","cross_cats_sorted":["cond-mat.other","cond-mat.str-el","physics.comp-ph"],"title_canon_sha256":"1bd926d47a3d55cbd1a0d7ab0e1e3be8ccae4e888364f1d9175c0ec845e40f28","abstract_canon_sha256":"bfcfa4f4baa6ac084e4efbfd8c247199f8361755c698748e7547669588e32c1e"},"schema_version":"1.0"},"canonical_sha256":"66db7df3d1a9da08882466186230f1700c766c8cd90b69135702df44c29a7a13","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:10:16.980217Z","signature_b64":"J5pb7x7ftR+f/1gDhpxS+2zBNsvn2CVC2UegRU8yMEhHfO1HNhprZ1WDgddA6Ch9KgdsH5KgRcAQSAVNdGqADw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66db7df3d1a9da08882466186230f1700c766c8cd90b69135702df44c29a7a13","last_reissued_at":"2026-05-18T00:10:16.979714Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:10:16.979714Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.04234","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":"2026-05-18T00:10:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RAxfyNL0Ow3v9lFfDx/v421ncqQvVJIf8qrUvMZPoUcxDlQi81XKHP6LeQ41fokFHYSt/PmkYTgAdavELcNqAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T21:13:50.559166Z"},"content_sha256":"b1e261106cc9ad5beaf71728878f56a09f4515ddd79f74ff973633b53cfd5d62","schema_version":"1.0","event_id":"sha256:b1e261106cc9ad5beaf71728878f56a09f4515ddd79f74ff973633b53cfd5d62"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:M3NX346RVHNARCBEMYMGEMHROA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Green functions and self-consistency: insights from the spherium model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other","cond-mat.str-el","physics.comp-ph"],"primary_cat":"physics.chem-ph","authors_text":"J. A. Berger, Pierre-Fran\\c{c}ois Loos, Pina Romaniello","submitted_at":"2018-03-12T13:12:56Z","abstract_excerpt":"We report an exhaustive study of the performance of different variants of Green function methods for the spherium model in which two electrons are confined to the surface of a sphere and interact via a genuine long-range Coulomb operator. We show that the spherium model provides a unique paradigm to study electronic correlation effects from the weakly correlated regime to the strongly correlated regime, since the mathematics are simple while the physics is rich. We compare perturbative GW, partially self-consistent GW and second-order Green function (GF2) methods for the computation of ionizat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.04234","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":"2026-05-18T00:10:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9D1P5ccxhh+xz1FAq9OgCpoEIyUJpr8pAQ1XeuAoGRpWu3Hg0tsizt6f1QL4eaYZmdp1CiTyF28gk9/m4IIkBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T21:13:50.559898Z"},"content_sha256":"577007812f29931ce17cf2dae615cbfb13420c8208e02a04593870ff9cfaa24a","schema_version":"1.0","event_id":"sha256:577007812f29931ce17cf2dae615cbfb13420c8208e02a04593870ff9cfaa24a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M3NX346RVHNARCBEMYMGEMHROA/bundle.json","state_url":"https://pith.science/pith/M3NX346RVHNARCBEMYMGEMHROA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M3NX346RVHNARCBEMYMGEMHROA/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":"2026-06-11T21:13:50Z","links":{"resolver":"https://pith.science/pith/M3NX346RVHNARCBEMYMGEMHROA","bundle":"https://pith.science/pith/M3NX346RVHNARCBEMYMGEMHROA/bundle.json","state":"https://pith.science/pith/M3NX346RVHNARCBEMYMGEMHROA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M3NX346RVHNARCBEMYMGEMHROA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:M3NX346RVHNARCBEMYMGEMHROA","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":"bfcfa4f4baa6ac084e4efbfd8c247199f8361755c698748e7547669588e32c1e","cross_cats_sorted":["cond-mat.other","cond-mat.str-el","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-03-12T13:12:56Z","title_canon_sha256":"1bd926d47a3d55cbd1a0d7ab0e1e3be8ccae4e888364f1d9175c0ec845e40f28"},"schema_version":"1.0","source":{"id":"1803.04234","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.04234","created_at":"2026-05-18T00:10:16Z"},{"alias_kind":"arxiv_version","alias_value":"1803.04234v1","created_at":"2026-05-18T00:10:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.04234","created_at":"2026-05-18T00:10:16Z"},{"alias_kind":"pith_short_12","alias_value":"M3NX346RVHNA","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"M3NX346RVHNARCBE","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"M3NX346R","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:577007812f29931ce17cf2dae615cbfb13420c8208e02a04593870ff9cfaa24a","target":"graph","created_at":"2026-05-18T00:10:16Z","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 report an exhaustive study of the performance of different variants of Green function methods for the spherium model in which two electrons are confined to the surface of a sphere and interact via a genuine long-range Coulomb operator. We show that the spherium model provides a unique paradigm to study electronic correlation effects from the weakly correlated regime to the strongly correlated regime, since the mathematics are simple while the physics is rich. We compare perturbative GW, partially self-consistent GW and second-order Green function (GF2) methods for the computation of ionizat","authors_text":"J. A. Berger, Pierre-Fran\\c{c}ois Loos, Pina Romaniello","cross_cats":["cond-mat.other","cond-mat.str-el","physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-03-12T13:12:56Z","title":"Green functions and self-consistency: insights from the spherium model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.04234","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:b1e261106cc9ad5beaf71728878f56a09f4515ddd79f74ff973633b53cfd5d62","target":"record","created_at":"2026-05-18T00:10:16Z","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":"bfcfa4f4baa6ac084e4efbfd8c247199f8361755c698748e7547669588e32c1e","cross_cats_sorted":["cond-mat.other","cond-mat.str-el","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-03-12T13:12:56Z","title_canon_sha256":"1bd926d47a3d55cbd1a0d7ab0e1e3be8ccae4e888364f1d9175c0ec845e40f28"},"schema_version":"1.0","source":{"id":"1803.04234","kind":"arxiv","version":1}},"canonical_sha256":"66db7df3d1a9da08882466186230f1700c766c8cd90b69135702df44c29a7a13","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66db7df3d1a9da08882466186230f1700c766c8cd90b69135702df44c29a7a13","first_computed_at":"2026-05-18T00:10:16.979714Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:16.979714Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"J5pb7x7ftR+f/1gDhpxS+2zBNsvn2CVC2UegRU8yMEhHfO1HNhprZ1WDgddA6Ch9KgdsH5KgRcAQSAVNdGqADw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:16.980217Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.04234","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b1e261106cc9ad5beaf71728878f56a09f4515ddd79f74ff973633b53cfd5d62","sha256:577007812f29931ce17cf2dae615cbfb13420c8208e02a04593870ff9cfaa24a"],"state_sha256":"754bfdefd525e539b52793f95770217777201d33b4cf1d84918ed5bacc38684b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GHw11txK3UmjD7fvKjsQfuPLphkSOfhg+N4u3s/gI0oroGfn9Sw9sDhPBreRyWiyxax4jBZA9V2cWN9+9qVUDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T21:13:50.563493Z","bundle_sha256":"180b0320866425960824798ad8602d33449cca46893ede81d3c0eb9c0fe56d0c"}}