{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:IQTSQGAJZB5LB2TM4YHFPHAA2L","short_pith_number":"pith:IQTSQGAJ","schema_version":"1.0","canonical_sha256":"4427281809c87ab0ea6ce60e579c00d2f42a8b725b405e4dfebcbf18ca0d3287","source":{"kind":"arxiv","id":"1809.03489","version":1},"attestation_state":"computed","paper":{"title":"Superradiant Amplification of Acoustic Beams via Medium Rotation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.class-ph","authors_text":"Daniele Faccio, Ewan M. Wright","submitted_at":"2018-09-08T17:59:35Z","abstract_excerpt":"Superradiant gain is the process in which waves are amplified via their interaction with a rotating body, examples including evaporation of a spinning black hole and electromagnetic emission from a rotating metal sphere. In this paper we elucidate theoretically how superradiance may be realized in the field of acoustics, and predict the possibility of non-reciprocally amplifying or absorbing acoustic beams carrying orbital angular momentum by propagating them through an absorbing medium that is rotating. We discuss a possible geometry for realizing the superradiant amplification process using "},"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":"1809.03489","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2018-09-08T17:59:35Z","cross_cats_sorted":[],"title_canon_sha256":"e757d8974ffb3ddd162246873cacef698a2e591568c6f43b253219d2b31c0b58","abstract_canon_sha256":"a7c23a156d35402c700fa93dab9adc73240971b244d4f34f0c3e527163a103fa"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:50:34.093096Z","signature_b64":"KbM5PedvgUN+qTnKlL6ZlOMPNkyKJHg2wUeNzm1lIpF0eWRqYS6gk8FcjyHsla28UjgF8e+VTYMQu5D4beY8Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4427281809c87ab0ea6ce60e579c00d2f42a8b725b405e4dfebcbf18ca0d3287","last_reissued_at":"2026-07-04T23:50:34.092603Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:50:34.092603Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Superradiant Amplification of Acoustic Beams via Medium Rotation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.class-ph","authors_text":"Daniele Faccio, Ewan M. Wright","submitted_at":"2018-09-08T17:59:35Z","abstract_excerpt":"Superradiant gain is the process in which waves are amplified via their interaction with a rotating body, examples including evaporation of a spinning black hole and electromagnetic emission from a rotating metal sphere. In this paper we elucidate theoretically how superradiance may be realized in the field of acoustics, and predict the possibility of non-reciprocally amplifying or absorbing acoustic beams carrying orbital angular momentum by propagating them through an absorbing medium that is rotating. We discuss a possible geometry for realizing the superradiant amplification process using "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.03489","kind":"arxiv","version":1},"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/1809.03489/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":"1809.03489","created_at":"2026-07-04T23:50:34.092661+00:00"},{"alias_kind":"arxiv_version","alias_value":"1809.03489v1","created_at":"2026-07-04T23:50:34.092661+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.03489","created_at":"2026-07-04T23:50:34.092661+00:00"},{"alias_kind":"pith_short_12","alias_value":"IQTSQGAJZB5L","created_at":"2026-07-04T23:50:34.092661+00:00"},{"alias_kind":"pith_short_16","alias_value":"IQTSQGAJZB5LB2TM","created_at":"2026-07-04T23:50:34.092661+00:00"},{"alias_kind":"pith_short_8","alias_value":"IQTSQGAJ","created_at":"2026-07-04T23:50:34.092661+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/IQTSQGAJZB5LB2TM4YHFPHAA2L","json":"https://pith.science/pith/IQTSQGAJZB5LB2TM4YHFPHAA2L.json","graph_json":"https://pith.science/api/pith-number/IQTSQGAJZB5LB2TM4YHFPHAA2L/graph.json","events_json":"https://pith.science/api/pith-number/IQTSQGAJZB5LB2TM4YHFPHAA2L/events.json","paper":"https://pith.science/paper/IQTSQGAJ"},"agent_actions":{"view_html":"https://pith.science/pith/IQTSQGAJZB5LB2TM4YHFPHAA2L","download_json":"https://pith.science/pith/IQTSQGAJZB5LB2TM4YHFPHAA2L.json","view_paper":"https://pith.science/paper/IQTSQGAJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1809.03489&json=true","fetch_graph":"https://pith.science/api/pith-number/IQTSQGAJZB5LB2TM4YHFPHAA2L/graph.json","fetch_events":"https://pith.science/api/pith-number/IQTSQGAJZB5LB2TM4YHFPHAA2L/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/IQTSQGAJZB5LB2TM4YHFPHAA2L/action/timestamp_anchor","attest_storage":"https://pith.science/pith/IQTSQGAJZB5LB2TM4YHFPHAA2L/action/storage_attestation","attest_author":"https://pith.science/pith/IQTSQGAJZB5LB2TM4YHFPHAA2L/action/author_attestation","sign_citation":"https://pith.science/pith/IQTSQGAJZB5LB2TM4YHFPHAA2L/action/citation_signature","submit_replication":"https://pith.science/pith/IQTSQGAJZB5LB2TM4YHFPHAA2L/action/replication_record"}},"created_at":"2026-07-04T23:50:34.092661+00:00","updated_at":"2026-07-04T23:50:34.092661+00:00"}