{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:JZFDMHMWU4L363ZKLI65NFD3UL","short_pith_number":"pith:JZFDMHMW","canonical_record":{"source":{"id":"0908.1126","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-08-07T21:26:02Z","cross_cats_sorted":[],"title_canon_sha256":"1bf9c4532ed2e2e3f4d3e5ba186a7848badfe608f24ee9ce8588dbe15514f0cf","abstract_canon_sha256":"679bc5ed1a2c07c6e82caac005bf0321cd97994a7ee474e0810e7528fd67fc54"},"schema_version":"1.0"},"canonical_sha256":"4e4a361d96a717bf6f2a5a3dd6947ba2cde2e6920e4fcf00234ce82781232614","source":{"kind":"arxiv","id":"0908.1126","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.1126","created_at":"2026-07-05T11:17:28Z"},{"alias_kind":"arxiv_version","alias_value":"0908.1126v4","created_at":"2026-07-05T11:17:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.1126","created_at":"2026-07-05T11:17:28Z"},{"alias_kind":"pith_short_12","alias_value":"JZFDMHMWU4L3","created_at":"2026-07-05T11:17:28Z"},{"alias_kind":"pith_short_16","alias_value":"JZFDMHMWU4L363ZK","created_at":"2026-07-05T11:17:28Z"},{"alias_kind":"pith_short_8","alias_value":"JZFDMHMW","created_at":"2026-07-05T11:17:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:JZFDMHMWU4L363ZKLI65NFD3UL","target":"record","payload":{"canonical_record":{"source":{"id":"0908.1126","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-08-07T21:26:02Z","cross_cats_sorted":[],"title_canon_sha256":"1bf9c4532ed2e2e3f4d3e5ba186a7848badfe608f24ee9ce8588dbe15514f0cf","abstract_canon_sha256":"679bc5ed1a2c07c6e82caac005bf0321cd97994a7ee474e0810e7528fd67fc54"},"schema_version":"1.0"},"canonical_sha256":"4e4a361d96a717bf6f2a5a3dd6947ba2cde2e6920e4fcf00234ce82781232614","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:17:28.630967Z","signature_b64":"+b7EbtdEZkELcOdj7DN2PRSNI2LaELOdIxO39crhkPHmWPdlOlYHVpAzsJ4gOx+qmOCfyHnGsSLNUTeJeWx+Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4e4a361d96a717bf6f2a5a3dd6947ba2cde2e6920e4fcf00234ce82781232614","last_reissued_at":"2026-07-05T11:17:28.630533Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:17:28.630533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0908.1126","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:17:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JVyTaRhGIfzEPwT3flRzrIlLceOZ3IVIuvwj1B84g3r3ZU8esJQYcVgnecBXCME9rCT63jJtzMiSkYo05ulNBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T08:23:49.822600Z"},"content_sha256":"5eebd149334cefd93048c3f418f491211565941ef28bbe23fc18b30a95df671b","schema_version":"1.0","event_id":"sha256:5eebd149334cefd93048c3f418f491211565941ef28bbe23fc18b30a95df671b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:JZFDMHMWU4L363ZKLI65NFD3UL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electrodynamics of correlated electron systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"N.P. Armitage","submitted_at":"2009-08-07T21:26:02Z","abstract_excerpt":"Physical and chemical systems can be characterized by their natural frequency and energy scales. It is hardly an exaggeration that most of what we know about such systems, from the acoustics of a violin to the energy levels of atoms, comes from their response to perturbations at these natural frequencies. It is of course the same situation in `correlated' electron materials. We can learn about the novel effects of strong electron-electron interactions and the properties of collective states of matter (superconductors, quantum magnets etc.) by characterizing their response to small amplitude pe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.1126","kind":"arxiv","version":4},"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/0908.1126/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":"2026-07-05T11:17:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ILX3eKdsFuaGoo/Jsi4Z98H4gbs44MDwyL39cIFpZg6JDAMc51egvzwWgUyROpCNTpX9/wlVHHD5NpnsKR5KBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T08:23:49.823886Z"},"content_sha256":"8c7c034f12add7c7c91c78c863c27a4925a5b512f853e6dab066fd179a2c9c32","schema_version":"1.0","event_id":"sha256:8c7c034f12add7c7c91c78c863c27a4925a5b512f853e6dab066fd179a2c9c32"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JZFDMHMWU4L363ZKLI65NFD3UL/bundle.json","state_url":"https://pith.science/pith/JZFDMHMWU4L363ZKLI65NFD3UL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JZFDMHMWU4L363ZKLI65NFD3UL/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":"2026-08-17T08:23:49Z","links":{"resolver":"https://pith.science/pith/JZFDMHMWU4L363ZKLI65NFD3UL","bundle":"https://pith.science/pith/JZFDMHMWU4L363ZKLI65NFD3UL/bundle.json","state":"https://pith.science/pith/JZFDMHMWU4L363ZKLI65NFD3UL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JZFDMHMWU4L363ZKLI65NFD3UL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:JZFDMHMWU4L363ZKLI65NFD3UL","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":"679bc5ed1a2c07c6e82caac005bf0321cd97994a7ee474e0810e7528fd67fc54","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-08-07T21:26:02Z","title_canon_sha256":"1bf9c4532ed2e2e3f4d3e5ba186a7848badfe608f24ee9ce8588dbe15514f0cf"},"schema_version":"1.0","source":{"id":"0908.1126","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.1126","created_at":"2026-07-05T11:17:28Z"},{"alias_kind":"arxiv_version","alias_value":"0908.1126v4","created_at":"2026-07-05T11:17:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.1126","created_at":"2026-07-05T11:17:28Z"},{"alias_kind":"pith_short_12","alias_value":"JZFDMHMWU4L3","created_at":"2026-07-05T11:17:28Z"},{"alias_kind":"pith_short_16","alias_value":"JZFDMHMWU4L363ZK","created_at":"2026-07-05T11:17:28Z"},{"alias_kind":"pith_short_8","alias_value":"JZFDMHMW","created_at":"2026-07-05T11:17:28Z"}],"graph_snapshots":[{"event_id":"sha256:8c7c034f12add7c7c91c78c863c27a4925a5b512f853e6dab066fd179a2c9c32","target":"graph","created_at":"2026-07-05T11:17:28Z","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/0908.1126/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Physical and chemical systems can be characterized by their natural frequency and energy scales. It is hardly an exaggeration that most of what we know about such systems, from the acoustics of a violin to the energy levels of atoms, comes from their response to perturbations at these natural frequencies. It is of course the same situation in `correlated' electron materials. We can learn about the novel effects of strong electron-electron interactions and the properties of collective states of matter (superconductors, quantum magnets etc.) by characterizing their response to small amplitude pe","authors_text":"N.P. Armitage","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-08-07T21:26:02Z","title":"Electrodynamics of correlated electron systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.1126","kind":"arxiv","version":4},"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":"sha256:5eebd149334cefd93048c3f418f491211565941ef28bbe23fc18b30a95df671b","target":"record","created_at":"2026-07-05T11:17:28Z","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":"679bc5ed1a2c07c6e82caac005bf0321cd97994a7ee474e0810e7528fd67fc54","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-08-07T21:26:02Z","title_canon_sha256":"1bf9c4532ed2e2e3f4d3e5ba186a7848badfe608f24ee9ce8588dbe15514f0cf"},"schema_version":"1.0","source":{"id":"0908.1126","kind":"arxiv","version":4}},"canonical_sha256":"4e4a361d96a717bf6f2a5a3dd6947ba2cde2e6920e4fcf00234ce82781232614","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4e4a361d96a717bf6f2a5a3dd6947ba2cde2e6920e4fcf00234ce82781232614","first_computed_at":"2026-07-05T11:17:28.630533Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:17:28.630533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+b7EbtdEZkELcOdj7DN2PRSNI2LaELOdIxO39crhkPHmWPdlOlYHVpAzsJ4gOx+qmOCfyHnGsSLNUTeJeWx+Bw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:17:28.630967Z","signed_message":"canonical_sha256_bytes"},"source_id":"0908.1126","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5eebd149334cefd93048c3f418f491211565941ef28bbe23fc18b30a95df671b","sha256:8c7c034f12add7c7c91c78c863c27a4925a5b512f853e6dab066fd179a2c9c32"],"state_sha256":"2c95cac17db4ec763e009ff18a28972b8fec773530f9719b03c9b3edb5047afb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UuyLzvBV21s75FqMf/a54wB+tblncE84V2nQO/2nmdUAoxj5JHTQ5Z8/t26jm7hpPF2iNrBWiwBofECJoFnVBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T08:23:49.829825Z","bundle_sha256":"ff21abc3069dad46fbc11bdadc2ad75ba352329469e9fc945c5614b431960006"}}