{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:CLAXIQV5SNCBGGQZC3TRDT4VA3","short_pith_number":"pith:CLAXIQV5","schema_version":"1.0","canonical_sha256":"12c17442bd9344131a1916e711cf9506d00e069f196e3d51406937a70454aaa1","source":{"kind":"arxiv","id":"2506.02148","version":2},"attestation_state":"computed","paper":{"title":"Scalar fields and 3D Flat Space Cosmologies","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Arjun Bagchi, Astha Kakkar, Saikat Mondal, Supratik Biswas","submitted_at":"2025-06-02T18:23:16Z","abstract_excerpt":"Flat Space Cosmologies (FSC) are time-dependent solutions in Einstein gravity in three-dimensional (3D) spacetimes with zero cosmological constant. These are orbifolds of 3D flat space that have a cosmological horizon and can be thought of as analogs of the Banados-Tietelboim-Zanelli (BTZ) black holes of AdS$_3$. We study scalar perturbations about these FSC solutions and explore the spectrum of quasi-normal modes (QNMs) crucially treating the cosmological horizon as a hard wall and extending to complex momenta. We connect this intrinsic analysis with the flatspace limit of the corresponding a"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2506.02148","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-th","submitted_at":"2025-06-02T18:23:16Z","cross_cats_sorted":[],"title_canon_sha256":"2aef93cbc4439b22b951a7324bba78cc8dbf893647fa0c194727895cfcdd02b5","abstract_canon_sha256":"ae55dc1858be52bdfeb30195b6bb7501e6f45de1d8cd2f10d8bfb11e376f56f7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:33:51.928668Z","signature_b64":"9BeOPeJ74kvhz7PAln/Mp4hjvbEO5efP/y3rcNUUvrTQGpkV/xKyGBF0B7dx5L9Iv3X06Ybk3hgQ/25SX+zxDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"12c17442bd9344131a1916e711cf9506d00e069f196e3d51406937a70454aaa1","last_reissued_at":"2026-07-05T11:33:51.928166Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:33:51.928166Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Scalar fields and 3D Flat Space Cosmologies","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Arjun Bagchi, Astha Kakkar, Saikat Mondal, Supratik Biswas","submitted_at":"2025-06-02T18:23:16Z","abstract_excerpt":"Flat Space Cosmologies (FSC) are time-dependent solutions in Einstein gravity in three-dimensional (3D) spacetimes with zero cosmological constant. These are orbifolds of 3D flat space that have a cosmological horizon and can be thought of as analogs of the Banados-Tietelboim-Zanelli (BTZ) black holes of AdS$_3$. We study scalar perturbations about these FSC solutions and explore the spectrum of quasi-normal modes (QNMs) crucially treating the cosmological horizon as a hard wall and extending to complex momenta. We connect this intrinsic analysis with the flatspace limit of the corresponding a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.02148","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/2506.02148/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2506.02148","created_at":"2026-07-05T11:33:51.928224+00:00"},{"alias_kind":"arxiv_version","alias_value":"2506.02148v2","created_at":"2026-07-05T11:33:51.928224+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.02148","created_at":"2026-07-05T11:33:51.928224+00:00"},{"alias_kind":"pith_short_12","alias_value":"CLAXIQV5SNCB","created_at":"2026-07-05T11:33:51.928224+00:00"},{"alias_kind":"pith_short_16","alias_value":"CLAXIQV5SNCBGGQZ","created_at":"2026-07-05T11:33:51.928224+00:00"},{"alias_kind":"pith_short_8","alias_value":"CLAXIQV5","created_at":"2026-07-05T11:33:51.928224+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":3,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.17360","citing_title":"Omni-DuplexEval: Evaluating Real-time Duplex Omni-modal Interaction","ref_index":42,"is_internal_anchor":false},{"citing_arxiv_id":"2605.17360","citing_title":"Omni-DuplexEval: Evaluating Real-time Duplex Omni-modal Interaction","ref_index":42,"is_internal_anchor":false},{"citing_arxiv_id":"2506.16164","citing_title":"The Carrollian Kaleidoscope","ref_index":229,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/CLAXIQV5SNCBGGQZC3TRDT4VA3","json":"https://pith.science/pith/CLAXIQV5SNCBGGQZC3TRDT4VA3.json","graph_json":"https://pith.science/api/pith-number/CLAXIQV5SNCBGGQZC3TRDT4VA3/graph.json","events_json":"https://pith.science/api/pith-number/CLAXIQV5SNCBGGQZC3TRDT4VA3/events.json","paper":"https://pith.science/paper/CLAXIQV5"},"agent_actions":{"view_html":"https://pith.science/pith/CLAXIQV5SNCBGGQZC3TRDT4VA3","download_json":"https://pith.science/pith/CLAXIQV5SNCBGGQZC3TRDT4VA3.json","view_paper":"https://pith.science/paper/CLAXIQV5","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2506.02148&json=true","fetch_graph":"https://pith.science/api/pith-number/CLAXIQV5SNCBGGQZC3TRDT4VA3/graph.json","fetch_events":"https://pith.science/api/pith-number/CLAXIQV5SNCBGGQZC3TRDT4VA3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CLAXIQV5SNCBGGQZC3TRDT4VA3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CLAXIQV5SNCBGGQZC3TRDT4VA3/action/storage_attestation","attest_author":"https://pith.science/pith/CLAXIQV5SNCBGGQZC3TRDT4VA3/action/author_attestation","sign_citation":"https://pith.science/pith/CLAXIQV5SNCBGGQZC3TRDT4VA3/action/citation_signature","submit_replication":"https://pith.science/pith/CLAXIQV5SNCBGGQZC3TRDT4VA3/action/replication_record"}},"created_at":"2026-07-05T11:33:51.928224+00:00","updated_at":"2026-07-05T11:33:51.928224+00:00"}