{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:5SUF6YVN7BMO5GR5AMXISYL74S","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":"5263e8baca45397dbe45968df30cec07064ec7154e4f6d3abb081f351463a17c","cross_cats_sorted":["astro-ph.HE","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-03-09T18:33:07Z","title_canon_sha256":"4e4c5262d54a57d042c37f9ba5a7a41993fb95166467fe0d3a542b2865d27d05"},"schema_version":"1.0","source":{"id":"2103.05610","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.05610","created_at":"2026-07-05T02:21:56Z"},{"alias_kind":"arxiv_version","alias_value":"2103.05610v1","created_at":"2026-07-05T02:21:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.05610","created_at":"2026-07-05T02:21:56Z"},{"alias_kind":"pith_short_12","alias_value":"5SUF6YVN7BMO","created_at":"2026-07-05T02:21:56Z"},{"alias_kind":"pith_short_16","alias_value":"5SUF6YVN7BMO5GR5","created_at":"2026-07-05T02:21:56Z"},{"alias_kind":"pith_short_8","alias_value":"5SUF6YVN","created_at":"2026-07-05T02:21:56Z"}],"graph_snapshots":[{"event_id":"sha256:8a4fed78a5e7cb987ac37e4279a3cdca0747d512896b0a883938cbfa20817da4","target":"graph","created_at":"2026-07-05T02:21:56Z","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/2103.05610/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"\"Warp drive\" spacetimes and wormhole geometries are useful as \"gedanken-experiments\" that force us to confront the foundations of general relativity, and among other issues, to precisely formulate the notion of \"superluminal\" travel and communication. Here we will consider the basic definition and properties of warp drive spacetimes. In particular, we will discuss the violation of the energy conditions associated with these spacetimes, as well as some other interesting properties such as the appearance of horizons for the superluminal case, and the possibility of using a warp drive to create c","authors_text":"Francisco S. N. Lobo, Miguel Alcubierre","cross_cats":["astro-ph.HE","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-03-09T18:33:07Z","title":"Warp drive basics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.05610","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":"sha256:54f2144b5bb4fac2aed5649a5ee2f95d35420327a878c5fa52ec4b811aeb1ddf","target":"record","created_at":"2026-07-05T02:21:56Z","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":"5263e8baca45397dbe45968df30cec07064ec7154e4f6d3abb081f351463a17c","cross_cats_sorted":["astro-ph.HE","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-03-09T18:33:07Z","title_canon_sha256":"4e4c5262d54a57d042c37f9ba5a7a41993fb95166467fe0d3a542b2865d27d05"},"schema_version":"1.0","source":{"id":"2103.05610","kind":"arxiv","version":1}},"canonical_sha256":"eca85f62adf858ee9a3d032e89617fe48e943abaf31ce7f8f97638a2df9f153c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eca85f62adf858ee9a3d032e89617fe48e943abaf31ce7f8f97638a2df9f153c","first_computed_at":"2026-07-05T02:21:56.485096Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:21:56.485096Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PQR4zqJepkUIejsmLaT5X/JrGJwIsh/xiQYg7+oo8k72dmvU7TugNCzDLehfHdDlAaunqBA1kTVa9FO1lZEiCg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:21:56.485618Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.05610","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:54f2144b5bb4fac2aed5649a5ee2f95d35420327a878c5fa52ec4b811aeb1ddf","sha256:8a4fed78a5e7cb987ac37e4279a3cdca0747d512896b0a883938cbfa20817da4"],"state_sha256":"dd50f502ede72bbf3dc15668a758355e23c8354d2e0700dadc6205e53d9b597d"}