{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:4VBZW2UI3ENFN3NQGDSFADIIMV","short_pith_number":"pith:4VBZW2UI","canonical_record":{"source":{"id":"2408.11595","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-08-21T13:05:21Z","cross_cats_sorted":["physics.chem-ph","physics.comp-ph"],"title_canon_sha256":"d9fff47524b7416bcbf47139a4d9b3d65c706dd89494fd39ed11d0b34f9f5200","abstract_canon_sha256":"5499dc2f817163cdba1df9b0c2252aab5a719548b1d3dad4d70e0d1f2ef09bcc"},"schema_version":"1.0"},"canonical_sha256":"e5439b6a88d91a56edb030e4500d086568e85224231c87edbc95f6afae949db7","source":{"kind":"arxiv","id":"2408.11595","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.11595","created_at":"2026-07-05T10:36:27Z"},{"alias_kind":"arxiv_version","alias_value":"2408.11595v2","created_at":"2026-07-05T10:36:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.11595","created_at":"2026-07-05T10:36:27Z"},{"alias_kind":"pith_short_12","alias_value":"4VBZW2UI3ENF","created_at":"2026-07-05T10:36:27Z"},{"alias_kind":"pith_short_16","alias_value":"4VBZW2UI3ENFN3NQ","created_at":"2026-07-05T10:36:27Z"},{"alias_kind":"pith_short_8","alias_value":"4VBZW2UI","created_at":"2026-07-05T10:36:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:4VBZW2UI3ENFN3NQGDSFADIIMV","target":"record","payload":{"canonical_record":{"source":{"id":"2408.11595","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-08-21T13:05:21Z","cross_cats_sorted":["physics.chem-ph","physics.comp-ph"],"title_canon_sha256":"d9fff47524b7416bcbf47139a4d9b3d65c706dd89494fd39ed11d0b34f9f5200","abstract_canon_sha256":"5499dc2f817163cdba1df9b0c2252aab5a719548b1d3dad4d70e0d1f2ef09bcc"},"schema_version":"1.0"},"canonical_sha256":"e5439b6a88d91a56edb030e4500d086568e85224231c87edbc95f6afae949db7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:36:27.506860Z","signature_b64":"Yu2xJT9eglOev1Wm7DuKiXc03U534JW5CImt4kGenL5bgsl+dxsvZaa7vtKE5veFB7RxVQqRrVVotU/USMfzAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e5439b6a88d91a56edb030e4500d086568e85224231c87edbc95f6afae949db7","last_reissued_at":"2026-07-05T10:36:27.505931Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:36:27.505931Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2408.11595","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:36:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bgu3rTZYokLYYwkGLG7heTyBLGlwlGH1lHBa8mgqyCdBOk/UIChU6QPdykAGeXWIbbJga6J0Em/G8+Fe+BUXAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T00:08:12.438468Z"},"content_sha256":"454cfd9b7f1d13bdac20813a5bdaaa6a314f6fd185c6aeaf71c87a898b269823","schema_version":"1.0","event_id":"sha256:454cfd9b7f1d13bdac20813a5bdaaa6a314f6fd185c6aeaf71c87a898b269823"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:4VBZW2UI3ENFN3NQGDSFADIIMV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Systematic study of confinement induced effects on atomic electronic structure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph","physics.comp-ph"],"primary_cat":"physics.atom-ph","authors_text":"Hugo {\\AA}str\\\"om, Susi Lehtola","submitted_at":"2024-08-21T13:05:21Z","abstract_excerpt":"We point out that although a litany of studies have been published on atoms in hard-wall confinement, they have not been systematic or have not used robust numerical methods. We report a methodical study of atoms in hard-wall confinement employing a robust finite element method (FEM) in HelFEM that guarantees variational results and allows easily finding the numerically exact solution. Our fully numerical calculations are non-relativistic and are carried out at three levels of density functional theory with spherically averaged densities: the PW92, PBE, and r$^2$SCAN functionals. The three are"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.11595","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2408.11595/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T10:36:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4H0EXYmbXnphHrpx85UEGjreXqBrii7M9+KFfZ5JrkpLPLtuyJ8GWEXgMEnv9fLWGsVGovK3WBVqouUQ4Z8MDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T00:08:12.439172Z"},"content_sha256":"ebed1feeea6a0737b5d5ec3d411d84bd6aa1058a07bdd9b8d1ef6752b8ec073d","schema_version":"1.0","event_id":"sha256:ebed1feeea6a0737b5d5ec3d411d84bd6aa1058a07bdd9b8d1ef6752b8ec073d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4VBZW2UI3ENFN3NQGDSFADIIMV/bundle.json","state_url":"https://pith.science/pith/4VBZW2UI3ENFN3NQGDSFADIIMV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4VBZW2UI3ENFN3NQGDSFADIIMV/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":"2026-08-17T00:08:12Z","links":{"resolver":"https://pith.science/pith/4VBZW2UI3ENFN3NQGDSFADIIMV","bundle":"https://pith.science/pith/4VBZW2UI3ENFN3NQGDSFADIIMV/bundle.json","state":"https://pith.science/pith/4VBZW2UI3ENFN3NQGDSFADIIMV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4VBZW2UI3ENFN3NQGDSFADIIMV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:4VBZW2UI3ENFN3NQGDSFADIIMV","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":"5499dc2f817163cdba1df9b0c2252aab5a719548b1d3dad4d70e0d1f2ef09bcc","cross_cats_sorted":["physics.chem-ph","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-08-21T13:05:21Z","title_canon_sha256":"d9fff47524b7416bcbf47139a4d9b3d65c706dd89494fd39ed11d0b34f9f5200"},"schema_version":"1.0","source":{"id":"2408.11595","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.11595","created_at":"2026-07-05T10:36:27Z"},{"alias_kind":"arxiv_version","alias_value":"2408.11595v2","created_at":"2026-07-05T10:36:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.11595","created_at":"2026-07-05T10:36:27Z"},{"alias_kind":"pith_short_12","alias_value":"4VBZW2UI3ENF","created_at":"2026-07-05T10:36:27Z"},{"alias_kind":"pith_short_16","alias_value":"4VBZW2UI3ENFN3NQ","created_at":"2026-07-05T10:36:27Z"},{"alias_kind":"pith_short_8","alias_value":"4VBZW2UI","created_at":"2026-07-05T10:36:27Z"}],"graph_snapshots":[{"event_id":"sha256:ebed1feeea6a0737b5d5ec3d411d84bd6aa1058a07bdd9b8d1ef6752b8ec073d","target":"graph","created_at":"2026-07-05T10:36:27Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2408.11595/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We point out that although a litany of studies have been published on atoms in hard-wall confinement, they have not been systematic or have not used robust numerical methods. We report a methodical study of atoms in hard-wall confinement employing a robust finite element method (FEM) in HelFEM that guarantees variational results and allows easily finding the numerically exact solution. Our fully numerical calculations are non-relativistic and are carried out at three levels of density functional theory with spherically averaged densities: the PW92, PBE, and r$^2$SCAN functionals. The three are","authors_text":"Hugo {\\AA}str\\\"om, Susi Lehtola","cross_cats":["physics.chem-ph","physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-08-21T13:05:21Z","title":"Systematic study of confinement induced effects on atomic electronic structure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.11595","kind":"arxiv","version":2},"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":"sha256:454cfd9b7f1d13bdac20813a5bdaaa6a314f6fd185c6aeaf71c87a898b269823","target":"record","created_at":"2026-07-05T10:36:27Z","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":"5499dc2f817163cdba1df9b0c2252aab5a719548b1d3dad4d70e0d1f2ef09bcc","cross_cats_sorted":["physics.chem-ph","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-08-21T13:05:21Z","title_canon_sha256":"d9fff47524b7416bcbf47139a4d9b3d65c706dd89494fd39ed11d0b34f9f5200"},"schema_version":"1.0","source":{"id":"2408.11595","kind":"arxiv","version":2}},"canonical_sha256":"e5439b6a88d91a56edb030e4500d086568e85224231c87edbc95f6afae949db7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e5439b6a88d91a56edb030e4500d086568e85224231c87edbc95f6afae949db7","first_computed_at":"2026-07-05T10:36:27.505931Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:36:27.505931Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Yu2xJT9eglOev1Wm7DuKiXc03U534JW5CImt4kGenL5bgsl+dxsvZaa7vtKE5veFB7RxVQqRrVVotU/USMfzAA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:36:27.506860Z","signed_message":"canonical_sha256_bytes"},"source_id":"2408.11595","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:454cfd9b7f1d13bdac20813a5bdaaa6a314f6fd185c6aeaf71c87a898b269823","sha256:ebed1feeea6a0737b5d5ec3d411d84bd6aa1058a07bdd9b8d1ef6752b8ec073d"],"state_sha256":"fc874deff0a810ff2d1bbf3b9977264778d065649fb27fec9c195904affba0c0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OGDKvccY4ufoaL/jvNqQ37kr+GBDrrtIQIjd4ug8hJk+1Frnn2uNlAHFW1oWcomVxt07iHKC3oZqlBmTV/qTDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T00:08:12.455396Z","bundle_sha256":"61938e7581d102f02e7ac05d7d7fad57d1f388fcd377f3a6f3b1859968a35e60"}}