{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:6TPQPYV7LYU54KWBZLOH5O3XE2","short_pith_number":"pith:6TPQPYV7","schema_version":"1.0","canonical_sha256":"f4df07e2bf5e29de2ac1cadc7ebb7726a8634e4173dec2bcbbf71fb125dda099","source":{"kind":"arxiv","id":"2111.14016","version":3},"attestation_state":"computed","paper":{"title":"Feynman's i-epsilon prescription, almost real spacetimes, and acceptable complex spacetimes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Matt Visser (Victoria University of Wellington)","submitted_at":"2021-11-28T01:22:31Z","abstract_excerpt":"Feynman's i-epsilon prescription for quantum field theoretic propagators has a quite natural reinterpretation in terms of a slight complex deformation of the Minkowski spacetime metric. Though originally a strictly flat-space result, once reinterpreted in this way, these ideas can be naturally extended first to semi-classical curved-spacetime QFT on a fixed background geometry and then, (with more work), to fluctuating spacetime geometries. There are intimate connections with variants of the weak energy condition. We shall take the Lorentzian signature metric as primary, but note that allowing"},"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":"2111.14016","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-11-28T01:22:31Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"19865127a797e26e6f93c58f06281be9a84c7e3f02bf1eb0e4710bed81d3c00e","abstract_canon_sha256":"b152c95d421d6179ef3452b2a8530b842144a29e159dad0945d7f5470ee5b323"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:54:48.342357Z","signature_b64":"nd7Kt42RMDxZjdhcaNNcNiFTfG1XKoOYyglRGP3GIzSq//1ayLHZstl29vP4jEt64upuaRBBhM6dZGU+tUuZDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f4df07e2bf5e29de2ac1cadc7ebb7726a8634e4173dec2bcbbf71fb125dda099","last_reissued_at":"2026-07-05T04:54:48.341913Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:54:48.341913Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Feynman's i-epsilon prescription, almost real spacetimes, and acceptable complex spacetimes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Matt Visser (Victoria University of Wellington)","submitted_at":"2021-11-28T01:22:31Z","abstract_excerpt":"Feynman's i-epsilon prescription for quantum field theoretic propagators has a quite natural reinterpretation in terms of a slight complex deformation of the Minkowski spacetime metric. Though originally a strictly flat-space result, once reinterpreted in this way, these ideas can be naturally extended first to semi-classical curved-spacetime QFT on a fixed background geometry and then, (with more work), to fluctuating spacetime geometries. There are intimate connections with variants of the weak energy condition. We shall take the Lorentzian signature metric as primary, but note that allowing"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.14016","kind":"arxiv","version":3},"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/2111.14016/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":"2111.14016","created_at":"2026-07-05T04:54:48.341978+00:00"},{"alias_kind":"arxiv_version","alias_value":"2111.14016v3","created_at":"2026-07-05T04:54:48.341978+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.14016","created_at":"2026-07-05T04:54:48.341978+00:00"},{"alias_kind":"pith_short_12","alias_value":"6TPQPYV7LYU5","created_at":"2026-07-05T04:54:48.341978+00:00"},{"alias_kind":"pith_short_16","alias_value":"6TPQPYV7LYU54KWB","created_at":"2026-07-05T04:54:48.341978+00:00"},{"alias_kind":"pith_short_8","alias_value":"6TPQPYV7","created_at":"2026-07-05T04:54:48.341978+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2606.07243","citing_title":"Wick-connected theories and Lorentz violation","ref_index":21,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/6TPQPYV7LYU54KWBZLOH5O3XE2","json":"https://pith.science/pith/6TPQPYV7LYU54KWBZLOH5O3XE2.json","graph_json":"https://pith.science/api/pith-number/6TPQPYV7LYU54KWBZLOH5O3XE2/graph.json","events_json":"https://pith.science/api/pith-number/6TPQPYV7LYU54KWBZLOH5O3XE2/events.json","paper":"https://pith.science/paper/6TPQPYV7"},"agent_actions":{"view_html":"https://pith.science/pith/6TPQPYV7LYU54KWBZLOH5O3XE2","download_json":"https://pith.science/pith/6TPQPYV7LYU54KWBZLOH5O3XE2.json","view_paper":"https://pith.science/paper/6TPQPYV7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2111.14016&json=true","fetch_graph":"https://pith.science/api/pith-number/6TPQPYV7LYU54KWBZLOH5O3XE2/graph.json","fetch_events":"https://pith.science/api/pith-number/6TPQPYV7LYU54KWBZLOH5O3XE2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6TPQPYV7LYU54KWBZLOH5O3XE2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6TPQPYV7LYU54KWBZLOH5O3XE2/action/storage_attestation","attest_author":"https://pith.science/pith/6TPQPYV7LYU54KWBZLOH5O3XE2/action/author_attestation","sign_citation":"https://pith.science/pith/6TPQPYV7LYU54KWBZLOH5O3XE2/action/citation_signature","submit_replication":"https://pith.science/pith/6TPQPYV7LYU54KWBZLOH5O3XE2/action/replication_record"}},"created_at":"2026-07-05T04:54:48.341978+00:00","updated_at":"2026-07-05T04:54:48.341978+00:00"}