{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:HGK3P5PY32MHQ4MI725IXDJSO3","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":"59120dafc421450704925ad7e69a53912a93a80ef5ed1312c62956baf650bbb3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-04-01T18:00:01Z","title_canon_sha256":"12ad2d895544a4074e4705997b88835ef337d7f439858c667891f06c0d801f7d"},"schema_version":"1.0","source":{"id":"2404.01374","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.01374","created_at":"2026-07-05T08:03:13Z"},{"alias_kind":"arxiv_version","alias_value":"2404.01374v1","created_at":"2026-07-05T08:03:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.01374","created_at":"2026-07-05T08:03:13Z"},{"alias_kind":"pith_short_12","alias_value":"HGK3P5PY32MH","created_at":"2026-07-05T08:03:13Z"},{"alias_kind":"pith_short_16","alias_value":"HGK3P5PY32MHQ4MI","created_at":"2026-07-05T08:03:13Z"},{"alias_kind":"pith_short_8","alias_value":"HGK3P5PY","created_at":"2026-07-05T08:03:13Z"}],"graph_snapshots":[{"event_id":"sha256:e81a47a4f03271e12fbcf9b9e654c52051459a23676910b78507ec879847f2a4","target":"graph","created_at":"2026-07-05T08:03:13Z","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/2404.01374/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"It has been shown, via specific examples and a pseudospectrum analysis, that the black hole quasinormal spectra are unstable. The implication of such a result for gravitational-wave physics and of our understanding of black holes is, still, unclear. The purpose of this work is twofold: (i) we show that some of the setups leading to instabilities are unphysical and triggered by exotic matter or extreme spacetimes; (ii) nevertheless, we also show simple examples of compelling physical scenarios leading to spectral instabilities. Our results highlight the importance of understanding the overtone ","authors_text":"Rodrigo Panosso Macedo, Shilpa Kastha, Vitor Cardoso","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-04-01T18:00:01Z","title":"On the physical significance of black hole quasinormal mode spectra instability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.01374","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":"sha256:67f9e915c2fec6b860d02e09248746c348ea958a03909c2a3516d965b6db269a","target":"record","created_at":"2026-07-05T08:03:13Z","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":"59120dafc421450704925ad7e69a53912a93a80ef5ed1312c62956baf650bbb3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-04-01T18:00:01Z","title_canon_sha256":"12ad2d895544a4074e4705997b88835ef337d7f439858c667891f06c0d801f7d"},"schema_version":"1.0","source":{"id":"2404.01374","kind":"arxiv","version":1}},"canonical_sha256":"3995b7f5f8de98787188feba8b8d3276fe2fe33e3a8b825ce7f4fc1f3e736942","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3995b7f5f8de98787188feba8b8d3276fe2fe33e3a8b825ce7f4fc1f3e736942","first_computed_at":"2026-07-05T08:03:13.366535Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:03:13.366535Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"douwNyAGW6bvR6qY0VvBYj4a2zwbek9uUmNlVPD5tKJMW+BOpkiO/27J5H/VNn0AsFGPesYwJjuD4+mXkqQcAw==","signature_status":"signed_v1","signed_at":"2026-07-05T08:03:13.366944Z","signed_message":"canonical_sha256_bytes"},"source_id":"2404.01374","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:67f9e915c2fec6b860d02e09248746c348ea958a03909c2a3516d965b6db269a","sha256:e81a47a4f03271e12fbcf9b9e654c52051459a23676910b78507ec879847f2a4"],"state_sha256":"84bf44cd9c6d5ee8911f762500e9f2eca23610f4b9614269bd3e93ffc301d42c"}