{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:J76VHJGYCIQHX75NHK5TWAH2YP","short_pith_number":"pith:J76VHJGY","canonical_record":{"source":{"id":"2103.06059","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2021-03-10T14:06:05Z","cross_cats_sorted":["hep-ex","hep-ph"],"title_canon_sha256":"80534c34796f8879fca8a4289449508e57f2bb91d0920a7b20d9b419357aa962","abstract_canon_sha256":"7e315de6c8721d405402529c9ba6d80ff09ce8b29508f3df45ab3d381c5c4b48"},"schema_version":"1.0"},"canonical_sha256":"4ffd53a4d812207bffad3abb3b00fac3f83e3a6939957c57086baf3029d1fbc0","source":{"kind":"arxiv","id":"2103.06059","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.06059","created_at":"2026-07-05T02:22:01Z"},{"alias_kind":"arxiv_version","alias_value":"2103.06059v1","created_at":"2026-07-05T02:22:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.06059","created_at":"2026-07-05T02:22:01Z"},{"alias_kind":"pith_short_12","alias_value":"J76VHJGYCIQH","created_at":"2026-07-05T02:22:01Z"},{"alias_kind":"pith_short_16","alias_value":"J76VHJGYCIQHX75N","created_at":"2026-07-05T02:22:01Z"},{"alias_kind":"pith_short_8","alias_value":"J76VHJGY","created_at":"2026-07-05T02:22:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:J76VHJGYCIQHX75NHK5TWAH2YP","target":"record","payload":{"canonical_record":{"source":{"id":"2103.06059","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2021-03-10T14:06:05Z","cross_cats_sorted":["hep-ex","hep-ph"],"title_canon_sha256":"80534c34796f8879fca8a4289449508e57f2bb91d0920a7b20d9b419357aa962","abstract_canon_sha256":"7e315de6c8721d405402529c9ba6d80ff09ce8b29508f3df45ab3d381c5c4b48"},"schema_version":"1.0"},"canonical_sha256":"4ffd53a4d812207bffad3abb3b00fac3f83e3a6939957c57086baf3029d1fbc0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:22:01.187239Z","signature_b64":"hSJNSO5ipbAAG3DLeC7C93b22jqrf5DHVo5aCuKci+Ze9yDv6U4c8cHSmYJsUF8NB9ocnYAnYGIYO372493oCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4ffd53a4d812207bffad3abb3b00fac3f83e3a6939957c57086baf3029d1fbc0","last_reissued_at":"2026-07-05T02:22:01.186881Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:22:01.186881Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2103.06059","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":"2026-07-05T02:22:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"irAUXYX6xM9zgfGk2b0gIvKseGdZZQHcbK5JKna/oQxCBDImg81NAWka3aDk4fim3s+CeaL91P/UNdq6mfbZBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T06:59:31.564847Z"},"content_sha256":"3a5e2eb62c9ff5269436b4f997b4baaceedd26fb9f5d056e97a9e8fd847f739a","schema_version":"1.0","event_id":"sha256:3a5e2eb62c9ff5269436b4f997b4baaceedd26fb9f5d056e97a9e8fd847f739a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:J76VHJGYCIQHX75NHK5TWAH2YP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photo-induced pair production and strong field QED on Gemini","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-ph"],"primary_cat":"physics.plasm-ph","authors_text":"A Di Piazza, B Dromey, CH Keitel, D Riley, EL Clark, GG Paulus, G Sarri, J Schreiber, K Krushelnick, M Borghesi, M Geissler, M Zepf, S Mangles, T Stoehlker, Z Najmudin","submitted_at":"2021-03-10T14:06:05Z","abstract_excerpt":"The extreme intensities obtainable with lasers such as Gemini allow non-linear QED phenomena to be investigated according to our calculations. Electron-positron pair production from a pure vacuum target, which has yet to be observed experimentally, is possibly the most iconic process. Beyond pair-production our campaign will allow the experimental investigation of currently unexplored extreme radiation regimes, like the quantum radiation dominated regime (where quantum and self-field effects become important) and non-linear Compton scattering. This is the first experiment in a multi-part campa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.06059","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/2103.06059/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":"2026-07-05T02:22:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ERdionB1C4Zj5mXm9mbjgbKNG9Yzm0WqMJamwfpuhnGmaDKkilLRNctvWq4sCduRoVVxxepZvig2jyBToBHCDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T06:59:31.565378Z"},"content_sha256":"1dac9a4934f2f5a03bc9b11da5ff9e31b3bba18b5797daa987a57ab020b113c9","schema_version":"1.0","event_id":"sha256:1dac9a4934f2f5a03bc9b11da5ff9e31b3bba18b5797daa987a57ab020b113c9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/J76VHJGYCIQHX75NHK5TWAH2YP/bundle.json","state_url":"https://pith.science/pith/J76VHJGYCIQHX75NHK5TWAH2YP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/J76VHJGYCIQHX75NHK5TWAH2YP/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":"2026-08-09T06:59:31Z","links":{"resolver":"https://pith.science/pith/J76VHJGYCIQHX75NHK5TWAH2YP","bundle":"https://pith.science/pith/J76VHJGYCIQHX75NHK5TWAH2YP/bundle.json","state":"https://pith.science/pith/J76VHJGYCIQHX75NHK5TWAH2YP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/J76VHJGYCIQHX75NHK5TWAH2YP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:J76VHJGYCIQHX75NHK5TWAH2YP","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":"7e315de6c8721d405402529c9ba6d80ff09ce8b29508f3df45ab3d381c5c4b48","cross_cats_sorted":["hep-ex","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2021-03-10T14:06:05Z","title_canon_sha256":"80534c34796f8879fca8a4289449508e57f2bb91d0920a7b20d9b419357aa962"},"schema_version":"1.0","source":{"id":"2103.06059","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.06059","created_at":"2026-07-05T02:22:01Z"},{"alias_kind":"arxiv_version","alias_value":"2103.06059v1","created_at":"2026-07-05T02:22:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.06059","created_at":"2026-07-05T02:22:01Z"},{"alias_kind":"pith_short_12","alias_value":"J76VHJGYCIQH","created_at":"2026-07-05T02:22:01Z"},{"alias_kind":"pith_short_16","alias_value":"J76VHJGYCIQHX75N","created_at":"2026-07-05T02:22:01Z"},{"alias_kind":"pith_short_8","alias_value":"J76VHJGY","created_at":"2026-07-05T02:22:01Z"}],"graph_snapshots":[{"event_id":"sha256:1dac9a4934f2f5a03bc9b11da5ff9e31b3bba18b5797daa987a57ab020b113c9","target":"graph","created_at":"2026-07-05T02:22:01Z","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/2103.06059/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The extreme intensities obtainable with lasers such as Gemini allow non-linear QED phenomena to be investigated according to our calculations. Electron-positron pair production from a pure vacuum target, which has yet to be observed experimentally, is possibly the most iconic process. Beyond pair-production our campaign will allow the experimental investigation of currently unexplored extreme radiation regimes, like the quantum radiation dominated regime (where quantum and self-field effects become important) and non-linear Compton scattering. This is the first experiment in a multi-part campa","authors_text":"A Di Piazza, B Dromey, CH Keitel, D Riley, EL Clark, GG Paulus, G Sarri, J Schreiber, K Krushelnick, M Borghesi, M Geissler, M Zepf, S Mangles, T Stoehlker, Z Najmudin","cross_cats":["hep-ex","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2021-03-10T14:06:05Z","title":"Photo-induced pair production and strong field QED on Gemini"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.06059","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":"sha256:3a5e2eb62c9ff5269436b4f997b4baaceedd26fb9f5d056e97a9e8fd847f739a","target":"record","created_at":"2026-07-05T02:22:01Z","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":"7e315de6c8721d405402529c9ba6d80ff09ce8b29508f3df45ab3d381c5c4b48","cross_cats_sorted":["hep-ex","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2021-03-10T14:06:05Z","title_canon_sha256":"80534c34796f8879fca8a4289449508e57f2bb91d0920a7b20d9b419357aa962"},"schema_version":"1.0","source":{"id":"2103.06059","kind":"arxiv","version":1}},"canonical_sha256":"4ffd53a4d812207bffad3abb3b00fac3f83e3a6939957c57086baf3029d1fbc0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4ffd53a4d812207bffad3abb3b00fac3f83e3a6939957c57086baf3029d1fbc0","first_computed_at":"2026-07-05T02:22:01.186881Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:22:01.186881Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hSJNSO5ipbAAG3DLeC7C93b22jqrf5DHVo5aCuKci+Ze9yDv6U4c8cHSmYJsUF8NB9ocnYAnYGIYO372493oCw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:22:01.187239Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.06059","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a5e2eb62c9ff5269436b4f997b4baaceedd26fb9f5d056e97a9e8fd847f739a","sha256:1dac9a4934f2f5a03bc9b11da5ff9e31b3bba18b5797daa987a57ab020b113c9"],"state_sha256":"6c1b37dbea78db5f605810fee7f0a2f3877cf8d5db025d7e4666392e8b7bd65f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v46JQ2gJgOb/oCv9VKsqcHMuIslrkDq4AMoFWj0Q2gLdZbq7Lk5eAW4GQQ8aA3NytZpiDr6n5WBrNrtk2MTmBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T06:59:31.569206Z","bundle_sha256":"e0523379be2c0836fde267dc24e3df22e7aa8301017176f26d878a7846c2acb8"}}