{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:EJUIRVJJGTH7HX2N6QWT6NLPPM","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":"d72dda42035c0d779587a46f321fd72e7b37b35cf0223925211bd988b227c050","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-12-15T14:07:13Z","title_canon_sha256":"77a888202a22185d2ffa7e54e3568719917c953a8a899ea19581ab5fb3bd6a06"},"schema_version":"1.0","source":{"id":"1512.04789","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.04789","created_at":"2026-05-18T01:21:03Z"},{"alias_kind":"arxiv_version","alias_value":"1512.04789v2","created_at":"2026-05-18T01:21:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.04789","created_at":"2026-05-18T01:21:03Z"},{"alias_kind":"pith_short_12","alias_value":"EJUIRVJJGTH7","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EJUIRVJJGTH7HX2N","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EJUIRVJJ","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:e8bc9f97ed19ba6ff4b8251d2fd2c4f9a79f763cde0782c27099fd88ef132705","target":"graph","created_at":"2026-05-18T01:21:03Z","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"},"paper":{"abstract_excerpt":"The orbital angular momentum (OAM) of light and matter waves is a parameter that is getting increasingly more attention over the past couple of years. Beams with a well defined OAM, the so-called vortex beams, are applied already in e.g. telecommunication, astrophysics, nanomanipulation and chiral measurements in optics and electron microscopy. Also the OAM of a wave induced by the interaction with a sample, shows great potential of interest. In all these experiments it is crucial to measure the exact (local) OAM content of the wave, whether it is an incoming vortex beam or an exit wave after ","authors_text":"Jo Verbeeck, Roeland Juchtmans","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-12-15T14:07:13Z","title":"Local orbital angular momentum revealed by spiral phase plate imaging in transmission electron microscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.04789","kind":"arxiv","version":2},"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:e02230a4b6cc214e75e7305277d1706b74d5ee936d0b6f0586ddee04b2be3568","target":"record","created_at":"2026-05-18T01:21:03Z","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":"d72dda42035c0d779587a46f321fd72e7b37b35cf0223925211bd988b227c050","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-12-15T14:07:13Z","title_canon_sha256":"77a888202a22185d2ffa7e54e3568719917c953a8a899ea19581ab5fb3bd6a06"},"schema_version":"1.0","source":{"id":"1512.04789","kind":"arxiv","version":2}},"canonical_sha256":"226888d52934cff3df4df42d3f356f7b3ce741370eadb15f01c30e114d9838a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"226888d52934cff3df4df42d3f356f7b3ce741370eadb15f01c30e114d9838a6","first_computed_at":"2026-05-18T01:21:03.941643Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:21:03.941643Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kZrdZCyKDoaiJCYEo4c90RyTfjbqEjx2WE0P3zXBLzvDXoxOsThpO0fSHup+PDUw/EV+fHVASicgHynpm/zuBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:21:03.942206Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.04789","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e02230a4b6cc214e75e7305277d1706b74d5ee936d0b6f0586ddee04b2be3568","sha256:e8bc9f97ed19ba6ff4b8251d2fd2c4f9a79f763cde0782c27099fd88ef132705"],"state_sha256":"e310aee33787bf495e3743588c2a96e90c7ae7f626c334aee5eac9b5d5771f0f"}