{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:6LBUD2EL6NS63CD2WSE4RMQD5P","short_pith_number":"pith:6LBUD2EL","canonical_record":{"source":{"id":"2206.12686","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-06-25T16:11:53Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"220430bf2eda48b5bad87a4d5c02f6441f042e56d749499825738d02aa6d657a","abstract_canon_sha256":"7da09eb1e1b7bafa926675e342adac5b06251024e159b62f26919597d20b52a3"},"schema_version":"1.0"},"canonical_sha256":"f2c341e88bf365ed887ab489c8b203ebdd691b3fff3fe1ca1432a70645d77dcb","source":{"kind":"arxiv","id":"2206.12686","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2206.12686","created_at":"2026-07-05T05:18:04Z"},{"alias_kind":"arxiv_version","alias_value":"2206.12686v2","created_at":"2026-07-05T05:18:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2206.12686","created_at":"2026-07-05T05:18:04Z"},{"alias_kind":"pith_short_12","alias_value":"6LBUD2EL6NS6","created_at":"2026-07-05T05:18:04Z"},{"alias_kind":"pith_short_16","alias_value":"6LBUD2EL6NS63CD2","created_at":"2026-07-05T05:18:04Z"},{"alias_kind":"pith_short_8","alias_value":"6LBUD2EL","created_at":"2026-07-05T05:18:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:6LBUD2EL6NS63CD2WSE4RMQD5P","target":"record","payload":{"canonical_record":{"source":{"id":"2206.12686","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-06-25T16:11:53Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"220430bf2eda48b5bad87a4d5c02f6441f042e56d749499825738d02aa6d657a","abstract_canon_sha256":"7da09eb1e1b7bafa926675e342adac5b06251024e159b62f26919597d20b52a3"},"schema_version":"1.0"},"canonical_sha256":"f2c341e88bf365ed887ab489c8b203ebdd691b3fff3fe1ca1432a70645d77dcb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:18:04.848217Z","signature_b64":"oM2EccPyKTheKgLrgKHZGNepyXd3PMZmAn8pmoBy7Epvu93tu/pYpPxQblgxpcNyUWyXNd3sXnXCLa4NrRRqCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f2c341e88bf365ed887ab489c8b203ebdd691b3fff3fe1ca1432a70645d77dcb","last_reissued_at":"2026-07-05T05:18:04.847764Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:18:04.847764Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2206.12686","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":"2026-07-05T05:18:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W772IdU+SGRfEh3vxGAo46mWrq2v70mgHntXooUcZr01lDUUyDhSuoGAxa1yHTFmJ1DkgPVbXGttgxr6vq9JAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T01:46:22.150454Z"},"content_sha256":"487e18e37c12149b28f50f9d7aa5e5b61a958ef0e04399c6c6ff927f011bc4f5","schema_version":"1.0","event_id":"sha256:487e18e37c12149b28f50f9d7aa5e5b61a958ef0e04399c6c6ff927f011bc4f5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:6LBUD2EL6NS63CD2WSE4RMQD5P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Topological photonics by breaking the degeneracy of line node singularities in semimetal-like photonic crystals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"physics.optics","authors_text":"Fatemeh Davoodi, Nahid Talebi, Ralf K\\\"ohl, Steffen B\\\"orm","submitted_at":"2022-06-25T16:11:53Z","abstract_excerpt":"Degeneracy is an omnipresent phenomenon in various physical systems, which has its roots in the preservation of geometrical symmetry. In electronic and photonic crystal systems, very often this degeneracy can be broken by virtue of strong interactions between photonic modes of the same energy, where the level repulsion and the hybridization between modes causes the emergence of photonic bandgaps. However, most often this phenomenon does not lead to a complete and inverted bandgap formation over the entire Brillouin zone. Here, by systematically breaking the symmetry of a two-dimensional square"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2206.12686","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2206.12686/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":"2026-07-05T05:18:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vTeavpi5w1S3rqsVwqwLfEVCUi0ZvoxcZ1vKVta0SwhFwYq0y2ykGnVVqW2muzWu+YN910rTDJsYLSuwnFceDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T01:46:22.151025Z"},"content_sha256":"b4594e25a925bd9170196173f6b565d0787e7e85e3e406ef16a8e84e3fdf4b53","schema_version":"1.0","event_id":"sha256:b4594e25a925bd9170196173f6b565d0787e7e85e3e406ef16a8e84e3fdf4b53"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6LBUD2EL6NS63CD2WSE4RMQD5P/bundle.json","state_url":"https://pith.science/pith/6LBUD2EL6NS63CD2WSE4RMQD5P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6LBUD2EL6NS63CD2WSE4RMQD5P/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":"2026-08-11T01:46:22Z","links":{"resolver":"https://pith.science/pith/6LBUD2EL6NS63CD2WSE4RMQD5P","bundle":"https://pith.science/pith/6LBUD2EL6NS63CD2WSE4RMQD5P/bundle.json","state":"https://pith.science/pith/6LBUD2EL6NS63CD2WSE4RMQD5P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6LBUD2EL6NS63CD2WSE4RMQD5P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:6LBUD2EL6NS63CD2WSE4RMQD5P","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":"7da09eb1e1b7bafa926675e342adac5b06251024e159b62f26919597d20b52a3","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-06-25T16:11:53Z","title_canon_sha256":"220430bf2eda48b5bad87a4d5c02f6441f042e56d749499825738d02aa6d657a"},"schema_version":"1.0","source":{"id":"2206.12686","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2206.12686","created_at":"2026-07-05T05:18:04Z"},{"alias_kind":"arxiv_version","alias_value":"2206.12686v2","created_at":"2026-07-05T05:18:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2206.12686","created_at":"2026-07-05T05:18:04Z"},{"alias_kind":"pith_short_12","alias_value":"6LBUD2EL6NS6","created_at":"2026-07-05T05:18:04Z"},{"alias_kind":"pith_short_16","alias_value":"6LBUD2EL6NS63CD2","created_at":"2026-07-05T05:18:04Z"},{"alias_kind":"pith_short_8","alias_value":"6LBUD2EL","created_at":"2026-07-05T05:18:04Z"}],"graph_snapshots":[{"event_id":"sha256:b4594e25a925bd9170196173f6b565d0787e7e85e3e406ef16a8e84e3fdf4b53","target":"graph","created_at":"2026-07-05T05:18:04Z","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/2206.12686/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Degeneracy is an omnipresent phenomenon in various physical systems, which has its roots in the preservation of geometrical symmetry. In electronic and photonic crystal systems, very often this degeneracy can be broken by virtue of strong interactions between photonic modes of the same energy, where the level repulsion and the hybridization between modes causes the emergence of photonic bandgaps. However, most often this phenomenon does not lead to a complete and inverted bandgap formation over the entire Brillouin zone. Here, by systematically breaking the symmetry of a two-dimensional square","authors_text":"Fatemeh Davoodi, Nahid Talebi, Ralf K\\\"ohl, Steffen B\\\"orm","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-06-25T16:11:53Z","title":"Topological photonics by breaking the degeneracy of line node singularities in semimetal-like photonic crystals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2206.12686","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":"sha256:487e18e37c12149b28f50f9d7aa5e5b61a958ef0e04399c6c6ff927f011bc4f5","target":"record","created_at":"2026-07-05T05:18:04Z","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":"7da09eb1e1b7bafa926675e342adac5b06251024e159b62f26919597d20b52a3","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-06-25T16:11:53Z","title_canon_sha256":"220430bf2eda48b5bad87a4d5c02f6441f042e56d749499825738d02aa6d657a"},"schema_version":"1.0","source":{"id":"2206.12686","kind":"arxiv","version":2}},"canonical_sha256":"f2c341e88bf365ed887ab489c8b203ebdd691b3fff3fe1ca1432a70645d77dcb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2c341e88bf365ed887ab489c8b203ebdd691b3fff3fe1ca1432a70645d77dcb","first_computed_at":"2026-07-05T05:18:04.847764Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:18:04.847764Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oM2EccPyKTheKgLrgKHZGNepyXd3PMZmAn8pmoBy7Epvu93tu/pYpPxQblgxpcNyUWyXNd3sXnXCLa4NrRRqCw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:18:04.848217Z","signed_message":"canonical_sha256_bytes"},"source_id":"2206.12686","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:487e18e37c12149b28f50f9d7aa5e5b61a958ef0e04399c6c6ff927f011bc4f5","sha256:b4594e25a925bd9170196173f6b565d0787e7e85e3e406ef16a8e84e3fdf4b53"],"state_sha256":"92f1924a95090f52cb3b1b3cee4bbbdeefa7adc3d964594bd88a2c8e9d4fe27c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oLcwn3/9bulgBgMRHBQaq6BBFbReTYhQmptlwaXAdIuspuOyCprd/zv1BPDuSKkwZZEVsJ2WmShKB683pUn3Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T01:46:22.156941Z","bundle_sha256":"f4bd7ee9986b9af2c41214197a5b53e38de470a400e738430077fae95079a9e5"}}