{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:IVTCIDX3QKUHMIUTQU6D7NRH6N","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":"201f7a5e4ef5cbccf233159784e87252bf239b2d4c20c82397c9f738899fcd95","cross_cats_sorted":["quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2018-10-30T18:23:54Z","title_canon_sha256":"e880ca7f5d0b3e46f65e8f8b419ba8adc6d5f6dfbd603b33474722cb224e3441"},"schema_version":"1.0","source":{"id":"1811.00385","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.00385","created_at":"2026-05-17T23:56:22Z"},{"alias_kind":"arxiv_version","alias_value":"1811.00385v3","created_at":"2026-05-17T23:56:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.00385","created_at":"2026-05-17T23:56:22Z"},{"alias_kind":"pith_short_12","alias_value":"IVTCIDX3QKUH","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"IVTCIDX3QKUHMIUT","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"IVTCIDX3","created_at":"2026-05-18T12:32:31Z"}],"graph_snapshots":[{"event_id":"sha256:7dca6afa7929cdb9c4d500e6549546ebcc9cacb72ebb94997b7b7a661ee9bb77","target":"graph","created_at":"2026-05-17T23:56:22Z","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"},"paper":{"abstract_excerpt":"We find solutions of the Dirac equation in curved spacetime. In particular, we consider 1+1 dimensional sections of several exotic metrics: the Alcubierre metric, which describes a scenario that allows faster-than-light (FTL) velocity; the G\\\"odel metric, that describes a universe containing closed timelike curves (CTC); and the Kerr metric, which corresponds to the spacetime of a rotating black hole. Moreover, we also show that the techniques that we use in these cases can be extended to nonstatic metrics.","authors_text":"Carlos Sab\\'in, Javier Faba Garc\\'ia","cross_cats":["quant-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2018-10-30T18:23:54Z","title":"Dirac equation in exotic spacetimes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.00385","kind":"arxiv","version":3},"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":"sha256:066764f2d3cd3ee6ea3cc2805ca61d817e9ab744135988dac855167e6f693e80","target":"record","created_at":"2026-05-17T23:56:22Z","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":"201f7a5e4ef5cbccf233159784e87252bf239b2d4c20c82397c9f738899fcd95","cross_cats_sorted":["quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2018-10-30T18:23:54Z","title_canon_sha256":"e880ca7f5d0b3e46f65e8f8b419ba8adc6d5f6dfbd603b33474722cb224e3441"},"schema_version":"1.0","source":{"id":"1811.00385","kind":"arxiv","version":3}},"canonical_sha256":"4566240efb82a8762293853c3fb627f36995e1461a2ae50af814750dde91ea45","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4566240efb82a8762293853c3fb627f36995e1461a2ae50af814750dde91ea45","first_computed_at":"2026-05-17T23:56:22.970759Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:22.970759Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LFYO4HKAujoJAqYXIs7nclzCdRdtBZ4wCcpd6c0jexWtkNiSwwqncIh5gw3lQaQCffNrpGS0IIm6XvErAoAlDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:22.971301Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.00385","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:066764f2d3cd3ee6ea3cc2805ca61d817e9ab744135988dac855167e6f693e80","sha256:7dca6afa7929cdb9c4d500e6549546ebcc9cacb72ebb94997b7b7a661ee9bb77"],"state_sha256":"9ea29c9239c4a4907ed1b43be3f1a70911b6242cb99a6ed3766f5d386f357f9e"}