{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:DBL7KNUTL4M5AULYA3TLHDUIKX","short_pith_number":"pith:DBL7KNUT","canonical_record":{"source":{"id":"1309.1756","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-09-06T19:58:17Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.soft","physics.chem-ph"],"title_canon_sha256":"4c26d400d6be07a52b90d344779e3ffe4039d117f81cf730715e7761b654fedd","abstract_canon_sha256":"ab505cd833676b71c492d8a8f0c4768236f2d11612f0535b9d61e7ac0f3e2026"},"schema_version":"1.0"},"canonical_sha256":"1857f536935f19d0517806e6b38e8855fc8e8d00ba3caea774566518695ad8fd","source":{"kind":"arxiv","id":"1309.1756","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.1756","created_at":"2026-05-18T03:01:35Z"},{"alias_kind":"arxiv_version","alias_value":"1309.1756v1","created_at":"2026-05-18T03:01:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.1756","created_at":"2026-05-18T03:01:35Z"},{"alias_kind":"pith_short_12","alias_value":"DBL7KNUTL4M5","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"DBL7KNUTL4M5AULY","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"DBL7KNUT","created_at":"2026-05-18T12:27:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:DBL7KNUTL4M5AULYA3TLHDUIKX","target":"record","payload":{"canonical_record":{"source":{"id":"1309.1756","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-09-06T19:58:17Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.soft","physics.chem-ph"],"title_canon_sha256":"4c26d400d6be07a52b90d344779e3ffe4039d117f81cf730715e7761b654fedd","abstract_canon_sha256":"ab505cd833676b71c492d8a8f0c4768236f2d11612f0535b9d61e7ac0f3e2026"},"schema_version":"1.0"},"canonical_sha256":"1857f536935f19d0517806e6b38e8855fc8e8d00ba3caea774566518695ad8fd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:01:35.461102Z","signature_b64":"erF22/x3eexEOTsW4iq2qLJEp5aWTu/QYXoDe5LrN7vNZwUGglpA4D4p53YXV+Azod3/PrL4BGHTkrm4frZpAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1857f536935f19d0517806e6b38e8855fc8e8d00ba3caea774566518695ad8fd","last_reissued_at":"2026-05-18T03:01:35.460585Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:01:35.460585Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.1756","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":"2026-05-18T03:01:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RMTl9eaWNE0Q+TQysZwjTCaBOJOGEUhjmy02E7e9DBzDo/blrbrmLX7Mi/jcXgzlopEOEsKaO53OowKQagfFBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T18:53:49.054300Z"},"content_sha256":"57e53aa77ef4a02040ee317d3213655b7fe51798f417b76d38dee8c97c29b8f1","schema_version":"1.0","event_id":"sha256:57e53aa77ef4a02040ee317d3213655b7fe51798f417b76d38dee8c97c29b8f1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:DBL7KNUTL4M5AULYA3TLHDUIKX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An exchange functional that tests the robustness of the plasmon description of the van der Waals density functional","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","cond-mat.soft","physics.chem-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Kristian Berland, Per Hyldgaard","submitted_at":"2013-09-06T19:58:17Z","abstract_excerpt":"Is the plasmon description within the non-local correlation of the van der Waals density functional by Dion and coworkers (vdW-DF1) robust enough to describe all exchange-correlation components? To address this question, we design an exchange functional, termed LV-PW86r based on this plasmon description as well as recent analysis on exchange in the large $s$-regime. In the regime with reduced gradients $s=|\\nabla n|/2n k_{\\rm F}(n)$ smaller than $\\approx 2.5$, dominating the non-local correlation part of the binding energy, the enhancement factor $F_x(s)$ closely resembles the Langreth-Vosko s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.1756","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":"2026-05-18T03:01:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l8eKkwe59+dQvZkhZeMTyVgayfCY4VHokKMyXJBSOzxgE/a4QjTUoppHtek6qS1RI7ifQl/1ZCIi6xjBeiACCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T18:53:49.054839Z"},"content_sha256":"71459aa975f22bea42615bed4ffcb1fd97184834891e35d9d78aab9797ab95d9","schema_version":"1.0","event_id":"sha256:71459aa975f22bea42615bed4ffcb1fd97184834891e35d9d78aab9797ab95d9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DBL7KNUTL4M5AULYA3TLHDUIKX/bundle.json","state_url":"https://pith.science/pith/DBL7KNUTL4M5AULYA3TLHDUIKX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DBL7KNUTL4M5AULYA3TLHDUIKX/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":"2026-05-27T18:53:49Z","links":{"resolver":"https://pith.science/pith/DBL7KNUTL4M5AULYA3TLHDUIKX","bundle":"https://pith.science/pith/DBL7KNUTL4M5AULYA3TLHDUIKX/bundle.json","state":"https://pith.science/pith/DBL7KNUTL4M5AULYA3TLHDUIKX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DBL7KNUTL4M5AULYA3TLHDUIKX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:DBL7KNUTL4M5AULYA3TLHDUIKX","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":"ab505cd833676b71c492d8a8f0c4768236f2d11612f0535b9d61e7ac0f3e2026","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.soft","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-09-06T19:58:17Z","title_canon_sha256":"4c26d400d6be07a52b90d344779e3ffe4039d117f81cf730715e7761b654fedd"},"schema_version":"1.0","source":{"id":"1309.1756","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.1756","created_at":"2026-05-18T03:01:35Z"},{"alias_kind":"arxiv_version","alias_value":"1309.1756v1","created_at":"2026-05-18T03:01:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.1756","created_at":"2026-05-18T03:01:35Z"},{"alias_kind":"pith_short_12","alias_value":"DBL7KNUTL4M5","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"DBL7KNUTL4M5AULY","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"DBL7KNUT","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:71459aa975f22bea42615bed4ffcb1fd97184834891e35d9d78aab9797ab95d9","target":"graph","created_at":"2026-05-18T03:01:35Z","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":"Is the plasmon description within the non-local correlation of the van der Waals density functional by Dion and coworkers (vdW-DF1) robust enough to describe all exchange-correlation components? To address this question, we design an exchange functional, termed LV-PW86r based on this plasmon description as well as recent analysis on exchange in the large $s$-regime. In the regime with reduced gradients $s=|\\nabla n|/2n k_{\\rm F}(n)$ smaller than $\\approx 2.5$, dominating the non-local correlation part of the binding energy, the enhancement factor $F_x(s)$ closely resembles the Langreth-Vosko s","authors_text":"Kristian Berland, Per Hyldgaard","cross_cats":["cond-mat.mes-hall","cond-mat.soft","physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-09-06T19:58:17Z","title":"An exchange functional that tests the robustness of the plasmon description of the van der Waals density functional"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.1756","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":"sha256:57e53aa77ef4a02040ee317d3213655b7fe51798f417b76d38dee8c97c29b8f1","target":"record","created_at":"2026-05-18T03:01:35Z","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":"ab505cd833676b71c492d8a8f0c4768236f2d11612f0535b9d61e7ac0f3e2026","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.soft","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-09-06T19:58:17Z","title_canon_sha256":"4c26d400d6be07a52b90d344779e3ffe4039d117f81cf730715e7761b654fedd"},"schema_version":"1.0","source":{"id":"1309.1756","kind":"arxiv","version":1}},"canonical_sha256":"1857f536935f19d0517806e6b38e8855fc8e8d00ba3caea774566518695ad8fd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1857f536935f19d0517806e6b38e8855fc8e8d00ba3caea774566518695ad8fd","first_computed_at":"2026-05-18T03:01:35.460585Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:01:35.460585Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"erF22/x3eexEOTsW4iq2qLJEp5aWTu/QYXoDe5LrN7vNZwUGglpA4D4p53YXV+Azod3/PrL4BGHTkrm4frZpAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:01:35.461102Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.1756","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:57e53aa77ef4a02040ee317d3213655b7fe51798f417b76d38dee8c97c29b8f1","sha256:71459aa975f22bea42615bed4ffcb1fd97184834891e35d9d78aab9797ab95d9"],"state_sha256":"11adc223ed7db353b119d6eca5fbf45891d3dcb02736b82b7c29d18b37b7bcfe"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XETY3jMcMnUfBsXH8Ip9kG7PJj+KbI5J6mVOSdt+BrnEHwM/AVRSrgwc50Y6cQvN6IinK7630gVaYTTbhc5QBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T18:53:49.059035Z","bundle_sha256":"13644281b7d5b8836832ea45ed273f475a8bd31998a6df4c4792279523f1be13"}}