{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:YKAQXUTVM7WRG4M3JZGID3MDYV","short_pith_number":"pith:YKAQXUTV","canonical_record":{"source":{"id":"2008.08578","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-08-19T17:59:08Z","cross_cats_sorted":[],"title_canon_sha256":"9a320b63cba7d9eabd3e1508b24d98aa5805510d728e695aad351170ae223b72","abstract_canon_sha256":"167201137301fa62e9508dd53d411cc41b90cbcd8204668831598ebebe37ba67"},"schema_version":"1.0"},"canonical_sha256":"c2810bd27567ed13719b4e4c81ed83c5766a63475fbefa18e3c292554629ae3e","source":{"kind":"arxiv","id":"2008.08578","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.08578","created_at":"2026-07-05T01:47:03Z"},{"alias_kind":"arxiv_version","alias_value":"2008.08578v1","created_at":"2026-07-05T01:47:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.08578","created_at":"2026-07-05T01:47:03Z"},{"alias_kind":"pith_short_12","alias_value":"YKAQXUTVM7WR","created_at":"2026-07-05T01:47:03Z"},{"alias_kind":"pith_short_16","alias_value":"YKAQXUTVM7WRG4M3","created_at":"2026-07-05T01:47:03Z"},{"alias_kind":"pith_short_8","alias_value":"YKAQXUTV","created_at":"2026-07-05T01:47:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:YKAQXUTVM7WRG4M3JZGID3MDYV","target":"record","payload":{"canonical_record":{"source":{"id":"2008.08578","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-08-19T17:59:08Z","cross_cats_sorted":[],"title_canon_sha256":"9a320b63cba7d9eabd3e1508b24d98aa5805510d728e695aad351170ae223b72","abstract_canon_sha256":"167201137301fa62e9508dd53d411cc41b90cbcd8204668831598ebebe37ba67"},"schema_version":"1.0"},"canonical_sha256":"c2810bd27567ed13719b4e4c81ed83c5766a63475fbefa18e3c292554629ae3e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:47:03.066381Z","signature_b64":"IYMDOL7kD/KwUPbqqv7sVOx+o5URNZq21BAY6JFTH6+Kd75aA1mfKQz6/fqXFofqFpAakc9d70iUImSWtHMnDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c2810bd27567ed13719b4e4c81ed83c5766a63475fbefa18e3c292554629ae3e","last_reissued_at":"2026-07-05T01:47:03.065907Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:47:03.065907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2008.08578","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:47:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xgqp/chx3PFUk9cQm0KLnhk33/yXqcV8WrgHg65wAPlIku9OU/Ix+7jAnGfxJL/1l3hjNMhB4NYvr79l9wcRDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T23:18:31.736155Z"},"content_sha256":"39aa5456fa97c96f5d0f7398ff769377281209ce969158636394e77c092d34fc","schema_version":"1.0","event_id":"sha256:39aa5456fa97c96f5d0f7398ff769377281209ce969158636394e77c092d34fc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:YKAQXUTVM7WRG4M3JZGID3MDYV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Loop spin effects in intense background fields","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Anton Ilderton, Ben King, Suo Tang","submitted_at":"2020-08-19T17:59:08Z","abstract_excerpt":"Radiative and non-radiative electron spin flip probabilities are analysed in both plane wave and focussed laser backgrounds. We provide a simple and physically transparent description of spin dynamics in plane waves, and demonstrate that there exists a kinematic regime in which the usual leading order perturbative hierarchy of QED is reversed, and non-radiative loop effects dominate over radiative tree-level spin-flips. We show that while this loop-dominance becomes suppressed in focussed laser pulses due to a high sensitivity to field geometry, there is nevertheless a regime in which, in prin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.08578","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/2008.08578/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:47:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yzfRB1cEZ7L22x6ap83xQSKMYNqsZJ+FGjDh1HZvJBZN7hLv+gmsHjbAoIae+wfTRVOcH6agMO6wOHSIC/5zAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T23:18:31.737167Z"},"content_sha256":"317c8a1bb9d38aa576c4736938337436afbf1a6443470ce79bf108789f45d681","schema_version":"1.0","event_id":"sha256:317c8a1bb9d38aa576c4736938337436afbf1a6443470ce79bf108789f45d681"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YKAQXUTVM7WRG4M3JZGID3MDYV/bundle.json","state_url":"https://pith.science/pith/YKAQXUTVM7WRG4M3JZGID3MDYV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YKAQXUTVM7WRG4M3JZGID3MDYV/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-10T23:18:31Z","links":{"resolver":"https://pith.science/pith/YKAQXUTVM7WRG4M3JZGID3MDYV","bundle":"https://pith.science/pith/YKAQXUTVM7WRG4M3JZGID3MDYV/bundle.json","state":"https://pith.science/pith/YKAQXUTVM7WRG4M3JZGID3MDYV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YKAQXUTVM7WRG4M3JZGID3MDYV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:YKAQXUTVM7WRG4M3JZGID3MDYV","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":"167201137301fa62e9508dd53d411cc41b90cbcd8204668831598ebebe37ba67","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-08-19T17:59:08Z","title_canon_sha256":"9a320b63cba7d9eabd3e1508b24d98aa5805510d728e695aad351170ae223b72"},"schema_version":"1.0","source":{"id":"2008.08578","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.08578","created_at":"2026-07-05T01:47:03Z"},{"alias_kind":"arxiv_version","alias_value":"2008.08578v1","created_at":"2026-07-05T01:47:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.08578","created_at":"2026-07-05T01:47:03Z"},{"alias_kind":"pith_short_12","alias_value":"YKAQXUTVM7WR","created_at":"2026-07-05T01:47:03Z"},{"alias_kind":"pith_short_16","alias_value":"YKAQXUTVM7WRG4M3","created_at":"2026-07-05T01:47:03Z"},{"alias_kind":"pith_short_8","alias_value":"YKAQXUTV","created_at":"2026-07-05T01:47:03Z"}],"graph_snapshots":[{"event_id":"sha256:317c8a1bb9d38aa576c4736938337436afbf1a6443470ce79bf108789f45d681","target":"graph","created_at":"2026-07-05T01:47:03Z","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/2008.08578/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Radiative and non-radiative electron spin flip probabilities are analysed in both plane wave and focussed laser backgrounds. We provide a simple and physically transparent description of spin dynamics in plane waves, and demonstrate that there exists a kinematic regime in which the usual leading order perturbative hierarchy of QED is reversed, and non-radiative loop effects dominate over radiative tree-level spin-flips. We show that while this loop-dominance becomes suppressed in focussed laser pulses due to a high sensitivity to field geometry, there is nevertheless a regime in which, in prin","authors_text":"Anton Ilderton, Ben King, Suo Tang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-08-19T17:59:08Z","title":"Loop spin effects in intense background fields"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.08578","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":"sha256:39aa5456fa97c96f5d0f7398ff769377281209ce969158636394e77c092d34fc","target":"record","created_at":"2026-07-05T01:47:03Z","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":"167201137301fa62e9508dd53d411cc41b90cbcd8204668831598ebebe37ba67","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-08-19T17:59:08Z","title_canon_sha256":"9a320b63cba7d9eabd3e1508b24d98aa5805510d728e695aad351170ae223b72"},"schema_version":"1.0","source":{"id":"2008.08578","kind":"arxiv","version":1}},"canonical_sha256":"c2810bd27567ed13719b4e4c81ed83c5766a63475fbefa18e3c292554629ae3e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c2810bd27567ed13719b4e4c81ed83c5766a63475fbefa18e3c292554629ae3e","first_computed_at":"2026-07-05T01:47:03.065907Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:47:03.065907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IYMDOL7kD/KwUPbqqv7sVOx+o5URNZq21BAY6JFTH6+Kd75aA1mfKQz6/fqXFofqFpAakc9d70iUImSWtHMnDw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:47:03.066381Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.08578","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:39aa5456fa97c96f5d0f7398ff769377281209ce969158636394e77c092d34fc","sha256:317c8a1bb9d38aa576c4736938337436afbf1a6443470ce79bf108789f45d681"],"state_sha256":"982200d3cc195af54315f8e03d106ee523f02e1cabc45b7ca6a9aaf8cde04384"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1ylnfY+Vvogw6+MSoWHTmU6+nDT8JJESvwMLrXP/eUQzXBKikcsZYnwF7inZBUVz6Jcm2flOYCRDzgfPIO0mAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T23:18:31.743707Z","bundle_sha256":"df62942a30390706e409e2191784152428a6e7d46a5b4428e2ed071023bb94c9"}}