{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:HVHAUVQF52WA2JEQJGCACV4HPA","short_pith_number":"pith:HVHAUVQF","canonical_record":{"source":{"id":"1805.03153","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-05-08T16:44:52Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"da4894903f1e43f04b4da4ca4ed393e81b035c9dfa8f9086856bc429a8d66c4c","abstract_canon_sha256":"19a3f8073ec5135cca5e635e943089058a8eaff198cfaa62ac5d7fb42ca48395"},"schema_version":"1.0"},"canonical_sha256":"3d4e0a5605eeac0d249049840157877819ed42b3f639e0bf3a839a5d22e4ea8c","source":{"kind":"arxiv","id":"1805.03153","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.03153","created_at":"2026-05-17T23:39:48Z"},{"alias_kind":"arxiv_version","alias_value":"1805.03153v2","created_at":"2026-05-17T23:39:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.03153","created_at":"2026-05-17T23:39:48Z"},{"alias_kind":"pith_short_12","alias_value":"HVHAUVQF52WA","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HVHAUVQF52WA2JEQ","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HVHAUVQF","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:HVHAUVQF52WA2JEQJGCACV4HPA","target":"record","payload":{"canonical_record":{"source":{"id":"1805.03153","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-05-08T16:44:52Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"da4894903f1e43f04b4da4ca4ed393e81b035c9dfa8f9086856bc429a8d66c4c","abstract_canon_sha256":"19a3f8073ec5135cca5e635e943089058a8eaff198cfaa62ac5d7fb42ca48395"},"schema_version":"1.0"},"canonical_sha256":"3d4e0a5605eeac0d249049840157877819ed42b3f639e0bf3a839a5d22e4ea8c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:39:48.996816Z","signature_b64":"v/SKF+JoAgmV5XVYrlLKm6yoiiyQxLzeq+6jJ6DiubSPTDA2hr0Y0U/EBdvbxUxaVgn0JN2iEeq1gfCZ+rqwDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3d4e0a5605eeac0d249049840157877819ed42b3f639e0bf3a839a5d22e4ea8c","last_reissued_at":"2026-05-17T23:39:48.996284Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:39:48.996284Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.03153","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":"2026-05-17T23:39:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LoQbrED+JBvmV9ARZcSGxoskSpLVClurAmVsspqhBA4MnN5BviFMrKDvQqnIox0Dw4E/c7hurXqIZIN9KmUWAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:15:43.715640Z"},"content_sha256":"07f539d0a2dfbff378b4081cb5724ee70c9565badc362a36ab33240ec5a31257","schema_version":"1.0","event_id":"sha256:07f539d0a2dfbff378b4081cb5724ee70c9565badc362a36ab33240ec5a31257"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:HVHAUVQF52WA2JEQJGCACV4HPA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Real and imaginary energy gaps: a comparison between single excitation Superradiance and Superconductivity and robustness to disorder","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.supr-con","authors_text":"Fausto Borgonovi, Francesco Mattiotti, G. Luca Celardo, J. A. Mendez-Bermudez, Nahum C. Chavez","submitted_at":"2018-05-08T16:44:52Z","abstract_excerpt":"A comparison between the single particle spectrum of the discrete Bardeen-Cooper-Schrieffer (BCS) model, used for small superconducting grains, and the spectrum of a paradigmatic model of Single Excitation Superradiance (SES) is presented. They are both characterized by an equally spaced energy spectrum (Picket Fence) where all the levels are coupled between each other by a constant coupling which is real for the BCS model and purely imaginary for the SES model. While the former corresponds to the discrete BCS-model describing the coupling of Cooper pairs in momentum space and it induces a Sup"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.03153","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":"2026-05-17T23:39:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YdrMMXfRNDq2YLbzB8RN87kvC5Vb7npbaFJrpafZTj+4SQAMPJsBj0J+LZyaNjgbKdrN23Phdt84emR8yYjABw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:15:43.716051Z"},"content_sha256":"6a8c8a9faa20e04a6e7db9be89c8361c743faea4a57b4858e3666c264e629fc9","schema_version":"1.0","event_id":"sha256:6a8c8a9faa20e04a6e7db9be89c8361c743faea4a57b4858e3666c264e629fc9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HVHAUVQF52WA2JEQJGCACV4HPA/bundle.json","state_url":"https://pith.science/pith/HVHAUVQF52WA2JEQJGCACV4HPA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HVHAUVQF52WA2JEQJGCACV4HPA/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":"2026-05-27T22:15:43Z","links":{"resolver":"https://pith.science/pith/HVHAUVQF52WA2JEQJGCACV4HPA","bundle":"https://pith.science/pith/HVHAUVQF52WA2JEQJGCACV4HPA/bundle.json","state":"https://pith.science/pith/HVHAUVQF52WA2JEQJGCACV4HPA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HVHAUVQF52WA2JEQJGCACV4HPA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:HVHAUVQF52WA2JEQJGCACV4HPA","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":"19a3f8073ec5135cca5e635e943089058a8eaff198cfaa62ac5d7fb42ca48395","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-05-08T16:44:52Z","title_canon_sha256":"da4894903f1e43f04b4da4ca4ed393e81b035c9dfa8f9086856bc429a8d66c4c"},"schema_version":"1.0","source":{"id":"1805.03153","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.03153","created_at":"2026-05-17T23:39:48Z"},{"alias_kind":"arxiv_version","alias_value":"1805.03153v2","created_at":"2026-05-17T23:39:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.03153","created_at":"2026-05-17T23:39:48Z"},{"alias_kind":"pith_short_12","alias_value":"HVHAUVQF52WA","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HVHAUVQF52WA2JEQ","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HVHAUVQF","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:6a8c8a9faa20e04a6e7db9be89c8361c743faea4a57b4858e3666c264e629fc9","target":"graph","created_at":"2026-05-17T23:39:48Z","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 comparison between the single particle spectrum of the discrete Bardeen-Cooper-Schrieffer (BCS) model, used for small superconducting grains, and the spectrum of a paradigmatic model of Single Excitation Superradiance (SES) is presented. They are both characterized by an equally spaced energy spectrum (Picket Fence) where all the levels are coupled between each other by a constant coupling which is real for the BCS model and purely imaginary for the SES model. While the former corresponds to the discrete BCS-model describing the coupling of Cooper pairs in momentum space and it induces a Sup","authors_text":"Fausto Borgonovi, Francesco Mattiotti, G. Luca Celardo, J. A. Mendez-Bermudez, Nahum C. Chavez","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-05-08T16:44:52Z","title":"Real and imaginary energy gaps: a comparison between single excitation Superradiance and Superconductivity and robustness to disorder"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.03153","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":"sha256:07f539d0a2dfbff378b4081cb5724ee70c9565badc362a36ab33240ec5a31257","target":"record","created_at":"2026-05-17T23:39:48Z","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":"19a3f8073ec5135cca5e635e943089058a8eaff198cfaa62ac5d7fb42ca48395","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-05-08T16:44:52Z","title_canon_sha256":"da4894903f1e43f04b4da4ca4ed393e81b035c9dfa8f9086856bc429a8d66c4c"},"schema_version":"1.0","source":{"id":"1805.03153","kind":"arxiv","version":2}},"canonical_sha256":"3d4e0a5605eeac0d249049840157877819ed42b3f639e0bf3a839a5d22e4ea8c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3d4e0a5605eeac0d249049840157877819ed42b3f639e0bf3a839a5d22e4ea8c","first_computed_at":"2026-05-17T23:39:48.996284Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:39:48.996284Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"v/SKF+JoAgmV5XVYrlLKm6yoiiyQxLzeq+6jJ6DiubSPTDA2hr0Y0U/EBdvbxUxaVgn0JN2iEeq1gfCZ+rqwDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:39:48.996816Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.03153","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:07f539d0a2dfbff378b4081cb5724ee70c9565badc362a36ab33240ec5a31257","sha256:6a8c8a9faa20e04a6e7db9be89c8361c743faea4a57b4858e3666c264e629fc9"],"state_sha256":"20fb70f17d6a36dc1e3ff69c591f979b21ce7e76e6833cbafb0e3befd21788b6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"07Fl0LNsX6nLP41wFooQQgD2+qx0BB3GC8bUTZ9zMTtnrLyU1OTq8RkYlC1NSTenFNJMBa+UntTcV1czl014BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T22:15:43.718908Z","bundle_sha256":"a388f7d3e67a10eff1100ddd54e5d6932812b2e26dba97b02a7ae5c4555f690a"}}