{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:K63OYA6EBBD3IUNDRDQ2K366LI","short_pith_number":"pith:K63OYA6E","canonical_record":{"source":{"id":"1208.4261","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-08-21T13:29:32Z","cross_cats_sorted":[],"title_canon_sha256":"f72cdfa0d4cc9ad62d3317d60297b2d99f4c85cf60627b1f29e5ab75d45d6fb5","abstract_canon_sha256":"2359e10915a8aab89e983801f7d11ba045a379b20ac47b1f3acf7eabed31bf18"},"schema_version":"1.0"},"canonical_sha256":"57b6ec03c40847b451a388e1a56fde5a3932382b58f5e2c7bbf449a893ffc2a8","source":{"kind":"arxiv","id":"1208.4261","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.4261","created_at":"2026-05-18T01:55:08Z"},{"alias_kind":"arxiv_version","alias_value":"1208.4261v1","created_at":"2026-05-18T01:55:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.4261","created_at":"2026-05-18T01:55:08Z"},{"alias_kind":"pith_short_12","alias_value":"K63OYA6EBBD3","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"K63OYA6EBBD3IUND","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"K63OYA6E","created_at":"2026-05-18T12:27:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:K63OYA6EBBD3IUNDRDQ2K366LI","target":"record","payload":{"canonical_record":{"source":{"id":"1208.4261","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-08-21T13:29:32Z","cross_cats_sorted":[],"title_canon_sha256":"f72cdfa0d4cc9ad62d3317d60297b2d99f4c85cf60627b1f29e5ab75d45d6fb5","abstract_canon_sha256":"2359e10915a8aab89e983801f7d11ba045a379b20ac47b1f3acf7eabed31bf18"},"schema_version":"1.0"},"canonical_sha256":"57b6ec03c40847b451a388e1a56fde5a3932382b58f5e2c7bbf449a893ffc2a8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:55:08.794662Z","signature_b64":"sZHarEinhjPh040/EhnkmmmhL0d2b+7x1u/PoCZ4ZLFCvP/JDgwUhM/KsUN45KySUaJMKEy9xdwHhNuslna6BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"57b6ec03c40847b451a388e1a56fde5a3932382b58f5e2c7bbf449a893ffc2a8","last_reissued_at":"2026-05-18T01:55:08.794181Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:55:08.794181Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.4261","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":"2026-05-18T01:55:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IjUXLR6aC0cnk4Lajie+yZFFYH19ELw4nfnpAolcDN502QtE16CkkaWdsI52HmJU8mzoBQTcfvTkz3yjRhFFBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T08:28:55.846647Z"},"content_sha256":"6019a5ddc1859c8ba767c730ad12ebf1920eba98f230b92ee0eab3b4e4877ed7","schema_version":"1.0","event_id":"sha256:6019a5ddc1859c8ba767c730ad12ebf1920eba98f230b92ee0eab3b4e4877ed7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:K63OYA6EBBD3IUNDRDQ2K366LI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Total Internal Reflection of Orbital Angular Momentum Beams","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Andrea Aiello, J. P. Woerdman, N. Hermosa, W. L\\\"offler","submitted_at":"2012-08-21T13:29:32Z","abstract_excerpt":"We investigate how beams with orbital angular momentum (OAM) behave under total internal reflection. This is studied in two complementary experiments: In the first experiment, we study geometric shifts of OAM beams upon total internal reflection (Goos-H\\\"anchen and Imbert-Fedorov shifts, for each the spatial and angular variant), and in the second experiment we determine changes in the OAM mode spectrum of a beam, again upon total internal reflection. As a result we find that in the first case, the shifts are independent of OAM and beam focussing, while in the second case, modifications in the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.4261","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":""},"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":"2026-05-18T01:55:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2+0rpEliONerDDTh/MIVGKGEyyWeJlmEa/LDTSKkyl9rMJVYIw/SXGwuNbp1xuIeWyh+KNhgi0TTgDQbLbhZDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T08:28:55.846987Z"},"content_sha256":"9d19903f84238b6523ae1c5b63b3dccd8ce4d25ff5a1414f4ffa17aec3af3936","schema_version":"1.0","event_id":"sha256:9d19903f84238b6523ae1c5b63b3dccd8ce4d25ff5a1414f4ffa17aec3af3936"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K63OYA6EBBD3IUNDRDQ2K366LI/bundle.json","state_url":"https://pith.science/pith/K63OYA6EBBD3IUNDRDQ2K366LI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K63OYA6EBBD3IUNDRDQ2K366LI/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":"2026-06-05T08:28:55Z","links":{"resolver":"https://pith.science/pith/K63OYA6EBBD3IUNDRDQ2K366LI","bundle":"https://pith.science/pith/K63OYA6EBBD3IUNDRDQ2K366LI/bundle.json","state":"https://pith.science/pith/K63OYA6EBBD3IUNDRDQ2K366LI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K63OYA6EBBD3IUNDRDQ2K366LI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:K63OYA6EBBD3IUNDRDQ2K366LI","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":"2359e10915a8aab89e983801f7d11ba045a379b20ac47b1f3acf7eabed31bf18","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-08-21T13:29:32Z","title_canon_sha256":"f72cdfa0d4cc9ad62d3317d60297b2d99f4c85cf60627b1f29e5ab75d45d6fb5"},"schema_version":"1.0","source":{"id":"1208.4261","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.4261","created_at":"2026-05-18T01:55:08Z"},{"alias_kind":"arxiv_version","alias_value":"1208.4261v1","created_at":"2026-05-18T01:55:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.4261","created_at":"2026-05-18T01:55:08Z"},{"alias_kind":"pith_short_12","alias_value":"K63OYA6EBBD3","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"K63OYA6EBBD3IUND","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"K63OYA6E","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:9d19903f84238b6523ae1c5b63b3dccd8ce4d25ff5a1414f4ffa17aec3af3936","target":"graph","created_at":"2026-05-18T01:55:08Z","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":"We investigate how beams with orbital angular momentum (OAM) behave under total internal reflection. This is studied in two complementary experiments: In the first experiment, we study geometric shifts of OAM beams upon total internal reflection (Goos-H\\\"anchen and Imbert-Fedorov shifts, for each the spatial and angular variant), and in the second experiment we determine changes in the OAM mode spectrum of a beam, again upon total internal reflection. As a result we find that in the first case, the shifts are independent of OAM and beam focussing, while in the second case, modifications in the","authors_text":"Andrea Aiello, J. P. Woerdman, N. Hermosa, W. L\\\"offler","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-08-21T13:29:32Z","title":"Total Internal Reflection of Orbital Angular Momentum Beams"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.4261","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":"sha256:6019a5ddc1859c8ba767c730ad12ebf1920eba98f230b92ee0eab3b4e4877ed7","target":"record","created_at":"2026-05-18T01:55:08Z","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":"2359e10915a8aab89e983801f7d11ba045a379b20ac47b1f3acf7eabed31bf18","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-08-21T13:29:32Z","title_canon_sha256":"f72cdfa0d4cc9ad62d3317d60297b2d99f4c85cf60627b1f29e5ab75d45d6fb5"},"schema_version":"1.0","source":{"id":"1208.4261","kind":"arxiv","version":1}},"canonical_sha256":"57b6ec03c40847b451a388e1a56fde5a3932382b58f5e2c7bbf449a893ffc2a8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"57b6ec03c40847b451a388e1a56fde5a3932382b58f5e2c7bbf449a893ffc2a8","first_computed_at":"2026-05-18T01:55:08.794181Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:08.794181Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sZHarEinhjPh040/EhnkmmmhL0d2b+7x1u/PoCZ4ZLFCvP/JDgwUhM/KsUN45KySUaJMKEy9xdwHhNuslna6BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:08.794662Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.4261","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6019a5ddc1859c8ba767c730ad12ebf1920eba98f230b92ee0eab3b4e4877ed7","sha256:9d19903f84238b6523ae1c5b63b3dccd8ce4d25ff5a1414f4ffa17aec3af3936"],"state_sha256":"b538a3944d384e6057a9c75ba01086d2e7b9879908d9cb1b1b6e105433da51dc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XJhIvl8X7l2CQZaZ5kuWChNUHE8PheNYRvFTr6b7/ekNOgwwqtk6vNV/EI22BqUVKuMyO/aoMcm4XSgChbjUAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T08:28:55.848998Z","bundle_sha256":"6ec1ff0246266312918363320aae7a24cb7a724e79f0de7b32a3e932fdffb5c0"}}