{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:ZWWG5CNJ7CLQ3LTSGDKDHA4VZN","short_pith_number":"pith:ZWWG5CNJ","canonical_record":{"source":{"id":"1105.0264","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-05-02T08:59:35Z","cross_cats_sorted":[],"title_canon_sha256":"cd4180fc2e9f3e313bf9fc840c71298680335da491953fa1f6ca0d861af62d52","abstract_canon_sha256":"58a5441464c35110205d587d11e20b1fab3c505b4e31c96007e85d72d0219055"},"schema_version":"1.0"},"canonical_sha256":"cdac6e89a9f8970dae7230d4338395cb4d9acbcdf08bdcc9d0bb9ab585e7ce2b","source":{"kind":"arxiv","id":"1105.0264","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.0264","created_at":"2026-05-18T04:23:12Z"},{"alias_kind":"arxiv_version","alias_value":"1105.0264v1","created_at":"2026-05-18T04:23:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.0264","created_at":"2026-05-18T04:23:12Z"},{"alias_kind":"pith_short_12","alias_value":"ZWWG5CNJ7CLQ","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"ZWWG5CNJ7CLQ3LTS","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"ZWWG5CNJ","created_at":"2026-05-18T12:26:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:ZWWG5CNJ7CLQ3LTSGDKDHA4VZN","target":"record","payload":{"canonical_record":{"source":{"id":"1105.0264","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-05-02T08:59:35Z","cross_cats_sorted":[],"title_canon_sha256":"cd4180fc2e9f3e313bf9fc840c71298680335da491953fa1f6ca0d861af62d52","abstract_canon_sha256":"58a5441464c35110205d587d11e20b1fab3c505b4e31c96007e85d72d0219055"},"schema_version":"1.0"},"canonical_sha256":"cdac6e89a9f8970dae7230d4338395cb4d9acbcdf08bdcc9d0bb9ab585e7ce2b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:23:12.171263Z","signature_b64":"QGeqbvtLD0YnEqyU6Y4dvJTWRzg+61bJ2pnNomSq8EAiTqn+X/YzR/XcwbuxpoZTmGeMnzT7amjs53x2Jh7qCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cdac6e89a9f8970dae7230d4338395cb4d9acbcdf08bdcc9d0bb9ab585e7ce2b","last_reissued_at":"2026-05-18T04:23:12.170790Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:23:12.170790Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1105.0264","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":"2026-05-18T04:23:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BdUMiVT8OHi0LDaw/Nyj5tFCikjXv8tbx9XU8OEuIAPsmrhTTWcQ3ze3JktGcEIYw8YjX+TADRubWDIccsDiDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T20:09:30.657904Z"},"content_sha256":"74c45b1f2ae8ec58b47a15a8664147d249e892b7e536f3000b9fd15439f88482","schema_version":"1.0","event_id":"sha256:74c45b1f2ae8ec58b47a15a8664147d249e892b7e536f3000b9fd15439f88482"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:ZWWG5CNJ7CLQ3LTSGDKDHA4VZN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Theoretical spectroscopy techniques applied to graphene EELS and optics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Rubio, D. J. Mowbray, P. Ayala, T. Pichler, V. Despoja","submitted_at":"2011-05-02T08:59:35Z","abstract_excerpt":"A thorough understanding of the electronic structure is a necessary first step for the design of nanoelectronics, chemical/bio-sensors, electrocatalysts, and nanoplasmonics using graphene. As such, theoretical spectroscopic techniques to describe both direct optical excitations and collective excitations of graphene are of fundamental importance. Starting from density functional theory (DFT) we use the time dependent linear response within the random phase approximation (TDDFT-RPA) to describe the loss function -Im{{\\epsilon}\\overline{ }^{1}(q,{\\omega})} for graphene. To ensure any spurious in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.0264","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":"2026-05-18T04:23:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8+J3w0l0uBnC9aD2kYwj8RQ6pdgxOw+O3n+8Px0qwcNBhTIzhHUK59tp5maZGu1XNj4jLcHf+qoW5fdbLRuSBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T20:09:30.658252Z"},"content_sha256":"8b414b6dc9c38e8397818d4dce37fccc3571b5a18c707b72a34d20f21dd27379","schema_version":"1.0","event_id":"sha256:8b414b6dc9c38e8397818d4dce37fccc3571b5a18c707b72a34d20f21dd27379"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZWWG5CNJ7CLQ3LTSGDKDHA4VZN/bundle.json","state_url":"https://pith.science/pith/ZWWG5CNJ7CLQ3LTSGDKDHA4VZN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZWWG5CNJ7CLQ3LTSGDKDHA4VZN/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":"2026-06-03T20:09:30Z","links":{"resolver":"https://pith.science/pith/ZWWG5CNJ7CLQ3LTSGDKDHA4VZN","bundle":"https://pith.science/pith/ZWWG5CNJ7CLQ3LTSGDKDHA4VZN/bundle.json","state":"https://pith.science/pith/ZWWG5CNJ7CLQ3LTSGDKDHA4VZN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZWWG5CNJ7CLQ3LTSGDKDHA4VZN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:ZWWG5CNJ7CLQ3LTSGDKDHA4VZN","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":"58a5441464c35110205d587d11e20b1fab3c505b4e31c96007e85d72d0219055","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-05-02T08:59:35Z","title_canon_sha256":"cd4180fc2e9f3e313bf9fc840c71298680335da491953fa1f6ca0d861af62d52"},"schema_version":"1.0","source":{"id":"1105.0264","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.0264","created_at":"2026-05-18T04:23:12Z"},{"alias_kind":"arxiv_version","alias_value":"1105.0264v1","created_at":"2026-05-18T04:23:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.0264","created_at":"2026-05-18T04:23:12Z"},{"alias_kind":"pith_short_12","alias_value":"ZWWG5CNJ7CLQ","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"ZWWG5CNJ7CLQ3LTS","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"ZWWG5CNJ","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:8b414b6dc9c38e8397818d4dce37fccc3571b5a18c707b72a34d20f21dd27379","target":"graph","created_at":"2026-05-18T04:23:12Z","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":"A thorough understanding of the electronic structure is a necessary first step for the design of nanoelectronics, chemical/bio-sensors, electrocatalysts, and nanoplasmonics using graphene. As such, theoretical spectroscopic techniques to describe both direct optical excitations and collective excitations of graphene are of fundamental importance. Starting from density functional theory (DFT) we use the time dependent linear response within the random phase approximation (TDDFT-RPA) to describe the loss function -Im{{\\epsilon}\\overline{ }^{1}(q,{\\omega})} for graphene. To ensure any spurious in","authors_text":"A. Rubio, D. J. Mowbray, P. Ayala, T. Pichler, V. Despoja","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-05-02T08:59:35Z","title":"Theoretical spectroscopy techniques applied to graphene EELS and optics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.0264","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":"sha256:74c45b1f2ae8ec58b47a15a8664147d249e892b7e536f3000b9fd15439f88482","target":"record","created_at":"2026-05-18T04:23:12Z","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":"58a5441464c35110205d587d11e20b1fab3c505b4e31c96007e85d72d0219055","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-05-02T08:59:35Z","title_canon_sha256":"cd4180fc2e9f3e313bf9fc840c71298680335da491953fa1f6ca0d861af62d52"},"schema_version":"1.0","source":{"id":"1105.0264","kind":"arxiv","version":1}},"canonical_sha256":"cdac6e89a9f8970dae7230d4338395cb4d9acbcdf08bdcc9d0bb9ab585e7ce2b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cdac6e89a9f8970dae7230d4338395cb4d9acbcdf08bdcc9d0bb9ab585e7ce2b","first_computed_at":"2026-05-18T04:23:12.170790Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:23:12.170790Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QGeqbvtLD0YnEqyU6Y4dvJTWRzg+61bJ2pnNomSq8EAiTqn+X/YzR/XcwbuxpoZTmGeMnzT7amjs53x2Jh7qCw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:23:12.171263Z","signed_message":"canonical_sha256_bytes"},"source_id":"1105.0264","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:74c45b1f2ae8ec58b47a15a8664147d249e892b7e536f3000b9fd15439f88482","sha256:8b414b6dc9c38e8397818d4dce37fccc3571b5a18c707b72a34d20f21dd27379"],"state_sha256":"05027cfc217b2eece420d361e89d355e2b0e5130bc87c4d602d93ef512a37f0c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CF/5bdpHwwgfmuqxSvzdifNbEbPjpUlCApFPR2kO+0pU0RJLZygm0IXDyu/z5QbZMvRVrYCvwooUeG/dV8LNDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T20:09:30.660222Z","bundle_sha256":"bf219a7563a94d9a3d972371fbc4744f894d35a8a5979d67c98c2b201ac34f3f"}}