{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:AW4CY52JELFFVQZEUYXYXQKKYB","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":"7f0e8858130c966e8b5ccc42dda4537fa7c663411b0c1a63647055fff4ba04b4","cross_cats_sorted":["gr-qc","hep-ex","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2008-12-01T19:14:45Z","title_canon_sha256":"b056be35d315bbf57fc65b1ea990990a1942a89cfad0dd92af1cefd61a66eb47"},"schema_version":"1.0","source":{"id":"0812.0345","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.0345","created_at":"2026-07-04T15:47:22Z"},{"alias_kind":"arxiv_version","alias_value":"0812.0345v1","created_at":"2026-07-04T15:47:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.0345","created_at":"2026-07-04T15:47:22Z"},{"alias_kind":"pith_short_12","alias_value":"AW4CY52JELFF","created_at":"2026-07-04T15:47:22Z"},{"alias_kind":"pith_short_16","alias_value":"AW4CY52JELFFVQZE","created_at":"2026-07-04T15:47:22Z"},{"alias_kind":"pith_short_8","alias_value":"AW4CY52J","created_at":"2026-07-04T15:47:22Z"}],"graph_snapshots":[{"event_id":"sha256:70461f0fc0300587c8d60e53f1898a821ccb6789bb2c4b7f995c2df8010e4cd2","target":"graph","created_at":"2026-07-04T15:47:22Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0812.0345/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Low energy non linear QED effects in vacuum have been predicted since 1936 and have been subject of research for many decades. Two main schemes have been proposed for such a 'first' detection: measurements of ellipticity acquired by a linearly polarized beam of light passing through a magnetic field and direct light-light scattering. The study of the propagation of light through an external field can also be used to probe for new physics such as the existence of axion-like particles and millicharged particles. Their existence in nature would cause the index of refraction of vacuum to be differ","authors_text":"E. Calloni, G. Zavattini","cross_cats":["gr-qc","hep-ex","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2008-12-01T19:14:45Z","title":"Probing For New Physics and Detecting non linear vacuum QED effects using gravitational wave interferometer antennas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.0345","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:e3db20db66a20c11217e7f652a8b689c754dffde6990fb82ba4a08b0def54224","target":"record","created_at":"2026-07-04T15:47:22Z","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":"7f0e8858130c966e8b5ccc42dda4537fa7c663411b0c1a63647055fff4ba04b4","cross_cats_sorted":["gr-qc","hep-ex","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2008-12-01T19:14:45Z","title_canon_sha256":"b056be35d315bbf57fc65b1ea990990a1942a89cfad0dd92af1cefd61a66eb47"},"schema_version":"1.0","source":{"id":"0812.0345","kind":"arxiv","version":1}},"canonical_sha256":"05b82c774922ca5ac324a62f8bc14ac0645cb339e803189157d9eb507fd877f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"05b82c774922ca5ac324a62f8bc14ac0645cb339e803189157d9eb507fd877f5","first_computed_at":"2026-07-04T15:47:22.075275Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:47:22.075275Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wBUj61PKzWNXXJi5bjnU5z9PJCpkn6AIiOO64L9DLBXHzdeOQOmehszO7BN6AIPoT6f3kRhKQCTTCppRIihaBw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:47:22.075708Z","signed_message":"canonical_sha256_bytes"},"source_id":"0812.0345","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e3db20db66a20c11217e7f652a8b689c754dffde6990fb82ba4a08b0def54224","sha256:70461f0fc0300587c8d60e53f1898a821ccb6789bb2c4b7f995c2df8010e4cd2"],"state_sha256":"f9d3fb8979e37c90ea1ce1d44f6232c94117fb6fdb55e0c967bc8b7a228c0dd2"}