{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:ZPYB2XIMUCHX5OGBNFN7FX5YIZ","short_pith_number":"pith:ZPYB2XIM","canonical_record":{"source":{"id":"1601.02398","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2016-01-11T11:05:28Z","cross_cats_sorted":[],"title_canon_sha256":"68da7ad88c51ff059efedaf0f1e4cd24619796c9f5dcb7c3ad0bbe8db31ba2f6","abstract_canon_sha256":"207d63e10f6da4eae5ae679aba22e90171d57978e9693114aa6b74bcbd036ce8"},"schema_version":"1.0"},"canonical_sha256":"cbf01d5d0ca08f7eb8c1695bf2dfb8467b188cce95e9468590d582ebb06a9205","source":{"kind":"arxiv","id":"1601.02398","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.02398","created_at":"2026-05-18T01:10:24Z"},{"alias_kind":"arxiv_version","alias_value":"1601.02398v2","created_at":"2026-05-18T01:10:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.02398","created_at":"2026-05-18T01:10:24Z"},{"alias_kind":"pith_short_12","alias_value":"ZPYB2XIMUCHX","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZPYB2XIMUCHX5OGB","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZPYB2XIM","created_at":"2026-05-18T12:30:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:ZPYB2XIMUCHX5OGBNFN7FX5YIZ","target":"record","payload":{"canonical_record":{"source":{"id":"1601.02398","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2016-01-11T11:05:28Z","cross_cats_sorted":[],"title_canon_sha256":"68da7ad88c51ff059efedaf0f1e4cd24619796c9f5dcb7c3ad0bbe8db31ba2f6","abstract_canon_sha256":"207d63e10f6da4eae5ae679aba22e90171d57978e9693114aa6b74bcbd036ce8"},"schema_version":"1.0"},"canonical_sha256":"cbf01d5d0ca08f7eb8c1695bf2dfb8467b188cce95e9468590d582ebb06a9205","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:24.747407Z","signature_b64":"eLHdGQNNjVxuDcvXPejpILDsVUXir7tFPsEyee0hWl/FmPr9BOkvnTIipu5o8Cu8yLY3ya+Iov4kOQx2xPfMAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cbf01d5d0ca08f7eb8c1695bf2dfb8467b188cce95e9468590d582ebb06a9205","last_reissued_at":"2026-05-18T01:10:24.746884Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:24.746884Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.02398","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":"2026-05-18T01:10:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PmAVEyIijbl6kp/MsQ4cA3e0lKibsppTVBd0CKy6FQF/2Naku6KHPCJnMOoAwpNj3G/6NcKIv7aIEAaAP0kNAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T00:24:28.850264Z"},"content_sha256":"5226c39872453251dc2f7323a34ed4ec92d2f6846c96865bd5de1aa637d09bcc","schema_version":"1.0","event_id":"sha256:5226c39872453251dc2f7323a34ed4ec92d2f6846c96865bd5de1aa637d09bcc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:ZPYB2XIMUCHX5OGBNFN7FX5YIZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Correlated Electronic Properties of Some Graphene Nanoribbons: A DMRG Study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"S. Ramasesha, Sumit Mazumdar, Suryoday Prodhan, V. M. L. Durga Prasad Goli","submitted_at":"2016-01-11T11:05:28Z","abstract_excerpt":"The significant electron-electron interactions that characterize the {\\pi}-electrons of graphene nanoribbons (GNRs) necessitate going beyond one-electron tight-binding description. Existing theories of electron-electron interactions in GNRs take into account one electron-one hole interactions accurately but miss higher order effects. We report highly accurate density matrix renormalization group (DMRG) calculations of the ground state electronic structure, the relative energies of the lowest one-photon versus two-photon excitations and the charge gaps in three narrow graphene nanoribbons (GNRs"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.02398","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":""},"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":"2026-05-18T01:10:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+Xdpe3ASrv95WeXbvTCBzS33pkXFnKyD+D5yptarpBydgr6yPvkaCr4WsQ9Mq1xjMmeGYxpj8YA4LMK1tK2QDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T00:24:28.850972Z"},"content_sha256":"2337edd254dd31a44ff2f10ab2f8953e35055dd93123eaf85f3ec2baecf7ad69","schema_version":"1.0","event_id":"sha256:2337edd254dd31a44ff2f10ab2f8953e35055dd93123eaf85f3ec2baecf7ad69"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZPYB2XIMUCHX5OGBNFN7FX5YIZ/bundle.json","state_url":"https://pith.science/pith/ZPYB2XIMUCHX5OGBNFN7FX5YIZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZPYB2XIMUCHX5OGBNFN7FX5YIZ/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":"2026-06-11T00:24:28Z","links":{"resolver":"https://pith.science/pith/ZPYB2XIMUCHX5OGBNFN7FX5YIZ","bundle":"https://pith.science/pith/ZPYB2XIMUCHX5OGBNFN7FX5YIZ/bundle.json","state":"https://pith.science/pith/ZPYB2XIMUCHX5OGBNFN7FX5YIZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZPYB2XIMUCHX5OGBNFN7FX5YIZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZPYB2XIMUCHX5OGBNFN7FX5YIZ","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":"207d63e10f6da4eae5ae679aba22e90171d57978e9693114aa6b74bcbd036ce8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2016-01-11T11:05:28Z","title_canon_sha256":"68da7ad88c51ff059efedaf0f1e4cd24619796c9f5dcb7c3ad0bbe8db31ba2f6"},"schema_version":"1.0","source":{"id":"1601.02398","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.02398","created_at":"2026-05-18T01:10:24Z"},{"alias_kind":"arxiv_version","alias_value":"1601.02398v2","created_at":"2026-05-18T01:10:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.02398","created_at":"2026-05-18T01:10:24Z"},{"alias_kind":"pith_short_12","alias_value":"ZPYB2XIMUCHX","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZPYB2XIMUCHX5OGB","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZPYB2XIM","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:2337edd254dd31a44ff2f10ab2f8953e35055dd93123eaf85f3ec2baecf7ad69","target":"graph","created_at":"2026-05-18T01:10:24Z","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":"The significant electron-electron interactions that characterize the {\\pi}-electrons of graphene nanoribbons (GNRs) necessitate going beyond one-electron tight-binding description. Existing theories of electron-electron interactions in GNRs take into account one electron-one hole interactions accurately but miss higher order effects. We report highly accurate density matrix renormalization group (DMRG) calculations of the ground state electronic structure, the relative energies of the lowest one-photon versus two-photon excitations and the charge gaps in three narrow graphene nanoribbons (GNRs","authors_text":"S. Ramasesha, Sumit Mazumdar, Suryoday Prodhan, V. M. L. Durga Prasad Goli","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2016-01-11T11:05:28Z","title":"Correlated Electronic Properties of Some Graphene Nanoribbons: A DMRG Study"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.02398","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":"sha256:5226c39872453251dc2f7323a34ed4ec92d2f6846c96865bd5de1aa637d09bcc","target":"record","created_at":"2026-05-18T01:10:24Z","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":"207d63e10f6da4eae5ae679aba22e90171d57978e9693114aa6b74bcbd036ce8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2016-01-11T11:05:28Z","title_canon_sha256":"68da7ad88c51ff059efedaf0f1e4cd24619796c9f5dcb7c3ad0bbe8db31ba2f6"},"schema_version":"1.0","source":{"id":"1601.02398","kind":"arxiv","version":2}},"canonical_sha256":"cbf01d5d0ca08f7eb8c1695bf2dfb8467b188cce95e9468590d582ebb06a9205","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cbf01d5d0ca08f7eb8c1695bf2dfb8467b188cce95e9468590d582ebb06a9205","first_computed_at":"2026-05-18T01:10:24.746884Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:24.746884Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eLHdGQNNjVxuDcvXPejpILDsVUXir7tFPsEyee0hWl/FmPr9BOkvnTIipu5o8Cu8yLY3ya+Iov4kOQx2xPfMAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:24.747407Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.02398","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5226c39872453251dc2f7323a34ed4ec92d2f6846c96865bd5de1aa637d09bcc","sha256:2337edd254dd31a44ff2f10ab2f8953e35055dd93123eaf85f3ec2baecf7ad69"],"state_sha256":"718cb653cb084c2c7132f1e114d1e52b09b29a8353653f91dc5384a9bb2d1413"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qPTaiHmYy/4mopIqpVYNajp63qlfIgMj0qn+gqWH7o8EkfMfez4/3y6EGQamsAcWY/G8hySztZGIFswUR2wcCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T00:24:28.855754Z","bundle_sha256":"771f2f797d43b8a230e790e16ee98e9ba9231b7b2c887b21ed5d5d3222439702"}}