{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:YB7AFE5PKEOZBPNBOKDQ76TTR3","short_pith_number":"pith:YB7AFE5P","schema_version":"1.0","canonical_sha256":"c07e0293af511d90bda172870ffa738edd28141e1b6536d3907727ee4b4a2054","source":{"kind":"arxiv","id":"0904.0141","version":2},"attestation_state":"computed","paper":{"title":"Semiclassical instability of dynamical warp drives","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Carlos Barcel\\'o, Stefano Finazzi, Stefano Liberati","submitted_at":"2009-04-01T13:06:12Z","abstract_excerpt":"Warp drives are very interesting configurations in General Relativity: At least theoretically, they provide a way to travel at superluminal speeds, albeit at the cost of requiring exotic matter to exist as solutions of Einstein's equations. However, even if one succeeded in providing the necessary exotic matter to build them, it would still be necessary to check whether they would survive to the switching on of quantum effects. Semiclassical corrections to warp-drive geometries have been analyzed only for eternal warp-drive bubbles traveling at fixed superluminal speeds. Here, we investigate t"},"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":"0904.0141","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-04-01T13:06:12Z","cross_cats_sorted":[],"title_canon_sha256":"7a36cd87fc4bde7e188e5c5e0499b80b4f693a0110f2a4170126e222c8c54e09","abstract_canon_sha256":"59a33225b10412dc2162d94091dbc56a9d95682e6dac73cf732d2ec4cce044d8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:00.011144Z","signature_b64":"PtpO17BwDwoB5iJqVAY8nkz5h6n1Wu4Fg6DVcggIvP5wW/cMpobLJ563ItrO3oQrUuuaevc7w1HOtCdPZNfdBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c07e0293af511d90bda172870ffa738edd28141e1b6536d3907727ee4b4a2054","last_reissued_at":"2026-05-18T02:35:00.010753Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:00.010753Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Semiclassical instability of dynamical warp drives","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Carlos Barcel\\'o, Stefano Finazzi, Stefano Liberati","submitted_at":"2009-04-01T13:06:12Z","abstract_excerpt":"Warp drives are very interesting configurations in General Relativity: At least theoretically, they provide a way to travel at superluminal speeds, albeit at the cost of requiring exotic matter to exist as solutions of Einstein's equations. However, even if one succeeded in providing the necessary exotic matter to build them, it would still be necessary to check whether they would survive to the switching on of quantum effects. Semiclassical corrections to warp-drive geometries have been analyzed only for eternal warp-drive bubbles traveling at fixed superluminal speeds. Here, we investigate t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0904.0141","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0904.0141","created_at":"2026-05-18T02:35:00.010808+00:00"},{"alias_kind":"arxiv_version","alias_value":"0904.0141v2","created_at":"2026-05-18T02:35:00.010808+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0904.0141","created_at":"2026-05-18T02:35:00.010808+00:00"},{"alias_kind":"pith_short_12","alias_value":"YB7AFE5PKEOZ","created_at":"2026-05-18T12:26:02.257875+00:00"},{"alias_kind":"pith_short_16","alias_value":"YB7AFE5PKEOZBPNB","created_at":"2026-05-18T12:26:02.257875+00:00"},{"alias_kind":"pith_short_8","alias_value":"YB7AFE5P","created_at":"2026-05-18T12:26:02.257875+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/YB7AFE5PKEOZBPNBOKDQ76TTR3","json":"https://pith.science/pith/YB7AFE5PKEOZBPNBOKDQ76TTR3.json","graph_json":"https://pith.science/api/pith-number/YB7AFE5PKEOZBPNBOKDQ76TTR3/graph.json","events_json":"https://pith.science/api/pith-number/YB7AFE5PKEOZBPNBOKDQ76TTR3/events.json","paper":"https://pith.science/paper/YB7AFE5P"},"agent_actions":{"view_html":"https://pith.science/pith/YB7AFE5PKEOZBPNBOKDQ76TTR3","download_json":"https://pith.science/pith/YB7AFE5PKEOZBPNBOKDQ76TTR3.json","view_paper":"https://pith.science/paper/YB7AFE5P","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0904.0141&json=true","fetch_graph":"https://pith.science/api/pith-number/YB7AFE5PKEOZBPNBOKDQ76TTR3/graph.json","fetch_events":"https://pith.science/api/pith-number/YB7AFE5PKEOZBPNBOKDQ76TTR3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YB7AFE5PKEOZBPNBOKDQ76TTR3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YB7AFE5PKEOZBPNBOKDQ76TTR3/action/storage_attestation","attest_author":"https://pith.science/pith/YB7AFE5PKEOZBPNBOKDQ76TTR3/action/author_attestation","sign_citation":"https://pith.science/pith/YB7AFE5PKEOZBPNBOKDQ76TTR3/action/citation_signature","submit_replication":"https://pith.science/pith/YB7AFE5PKEOZBPNBOKDQ76TTR3/action/replication_record"}},"created_at":"2026-05-18T02:35:00.010808+00:00","updated_at":"2026-05-18T02:35:00.010808+00:00"}