{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:2LBQ2Z6DAS2TOYTQPHYJCVKGBW","short_pith_number":"pith:2LBQ2Z6D","canonical_record":{"source":{"id":"1307.6304","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-07-24T06:26:11Z","cross_cats_sorted":[],"title_canon_sha256":"1aaed0ae06a37112e8fadf5947f8bb52cf0e46575e0654dc0c4a6a423b5104cc","abstract_canon_sha256":"e4f5e5abb2632227dffba15d99ba2ccfbfc79678232e278c34f6e4ab0d35bd46"},"schema_version":"1.0"},"canonical_sha256":"d2c30d67c304b537627079f09155460da474e1770e0f8f59c22c3238b3f1e151","source":{"kind":"arxiv","id":"1307.6304","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.6304","created_at":"2026-05-18T01:48:40Z"},{"alias_kind":"arxiv_version","alias_value":"1307.6304v1","created_at":"2026-05-18T01:48:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.6304","created_at":"2026-05-18T01:48:40Z"},{"alias_kind":"pith_short_12","alias_value":"2LBQ2Z6DAS2T","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"2LBQ2Z6DAS2TOYTQ","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"2LBQ2Z6D","created_at":"2026-05-18T12:27:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:2LBQ2Z6DAS2TOYTQPHYJCVKGBW","target":"record","payload":{"canonical_record":{"source":{"id":"1307.6304","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-07-24T06:26:11Z","cross_cats_sorted":[],"title_canon_sha256":"1aaed0ae06a37112e8fadf5947f8bb52cf0e46575e0654dc0c4a6a423b5104cc","abstract_canon_sha256":"e4f5e5abb2632227dffba15d99ba2ccfbfc79678232e278c34f6e4ab0d35bd46"},"schema_version":"1.0"},"canonical_sha256":"d2c30d67c304b537627079f09155460da474e1770e0f8f59c22c3238b3f1e151","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:40.799882Z","signature_b64":"kf0utPznfXHVFj1GlrFE/eYQTaWKkpcDv44JBAVPlHfPmNLI/zCIrIhvCVET35gweI1fBQvTYtnV0+gWk3/+AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2c30d67c304b537627079f09155460da474e1770e0f8f59c22c3238b3f1e151","last_reissued_at":"2026-05-18T01:48:40.799362Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:40.799362Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.6304","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":"2026-05-18T01:48:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yyANRXrtMde+hiUdt4ZjohrZnvdqd9mgN7XUUD09tlRLY37TiZoYhhA106c29nVZtqduuqV/3QVDeDqQtXhlBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T15:10:00.657773Z"},"content_sha256":"038771f9e5164940c040b3fcc76bdb18b71d85f7622f8323030e1228a36f4015","schema_version":"1.0","event_id":"sha256:038771f9e5164940c040b3fcc76bdb18b71d85f7622f8323030e1228a36f4015"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:2LBQ2Z6DAS2TOYTQPHYJCVKGBW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measuring the orbital angular momentum of electron vortex beams using a forked grating","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Kazuma Hirakawa, Koh Saitoh, Masaya Uchida, Nobuo Tanaka, Yuya Hasegawa","submitted_at":"2013-07-24T06:26:11Z","abstract_excerpt":"The present study experimentally examines how an electron vortex beam with orbital angular momentum (OAM) undergoes diffraction through a forked grating. The nth-order diffracted electron vortex beam after passing through a forked grating with a Burgers vector of 1 shows an OAM transfer of nh. Hence, the diffraction patterns become mirror asymmetric owing to the size difference between the electron beams. Such a forked grating, when used in combination with a pinhole located at the diffraction plane, could act as an analyzer to measure the OAM of input electrons."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.6304","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":"2026-05-18T01:48:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FPh9SRwAT1GWosyBH+fWAZtDcaThsHNcZGoxaezUIx2lEgU3HZGu2AOujhbgXmlhtqP1wIuGBxTz66JkFBWqCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T15:10:00.658173Z"},"content_sha256":"802d6fdeb59a4f02bddb16b41729a88d382604516dd9ef62349d1c264a72ba19","schema_version":"1.0","event_id":"sha256:802d6fdeb59a4f02bddb16b41729a88d382604516dd9ef62349d1c264a72ba19"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2LBQ2Z6DAS2TOYTQPHYJCVKGBW/bundle.json","state_url":"https://pith.science/pith/2LBQ2Z6DAS2TOYTQPHYJCVKGBW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2LBQ2Z6DAS2TOYTQPHYJCVKGBW/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":"2026-06-03T15:10:00Z","links":{"resolver":"https://pith.science/pith/2LBQ2Z6DAS2TOYTQPHYJCVKGBW","bundle":"https://pith.science/pith/2LBQ2Z6DAS2TOYTQPHYJCVKGBW/bundle.json","state":"https://pith.science/pith/2LBQ2Z6DAS2TOYTQPHYJCVKGBW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2LBQ2Z6DAS2TOYTQPHYJCVKGBW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:2LBQ2Z6DAS2TOYTQPHYJCVKGBW","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":"e4f5e5abb2632227dffba15d99ba2ccfbfc79678232e278c34f6e4ab0d35bd46","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-07-24T06:26:11Z","title_canon_sha256":"1aaed0ae06a37112e8fadf5947f8bb52cf0e46575e0654dc0c4a6a423b5104cc"},"schema_version":"1.0","source":{"id":"1307.6304","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.6304","created_at":"2026-05-18T01:48:40Z"},{"alias_kind":"arxiv_version","alias_value":"1307.6304v1","created_at":"2026-05-18T01:48:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.6304","created_at":"2026-05-18T01:48:40Z"},{"alias_kind":"pith_short_12","alias_value":"2LBQ2Z6DAS2T","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"2LBQ2Z6DAS2TOYTQ","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"2LBQ2Z6D","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:802d6fdeb59a4f02bddb16b41729a88d382604516dd9ef62349d1c264a72ba19","target":"graph","created_at":"2026-05-18T01:48:40Z","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 present study experimentally examines how an electron vortex beam with orbital angular momentum (OAM) undergoes diffraction through a forked grating. The nth-order diffracted electron vortex beam after passing through a forked grating with a Burgers vector of 1 shows an OAM transfer of nh. Hence, the diffraction patterns become mirror asymmetric owing to the size difference between the electron beams. Such a forked grating, when used in combination with a pinhole located at the diffraction plane, could act as an analyzer to measure the OAM of input electrons.","authors_text":"Kazuma Hirakawa, Koh Saitoh, Masaya Uchida, Nobuo Tanaka, Yuya Hasegawa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-07-24T06:26:11Z","title":"Measuring the orbital angular momentum of electron vortex beams using a forked grating"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.6304","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":"sha256:038771f9e5164940c040b3fcc76bdb18b71d85f7622f8323030e1228a36f4015","target":"record","created_at":"2026-05-18T01:48:40Z","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":"e4f5e5abb2632227dffba15d99ba2ccfbfc79678232e278c34f6e4ab0d35bd46","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-07-24T06:26:11Z","title_canon_sha256":"1aaed0ae06a37112e8fadf5947f8bb52cf0e46575e0654dc0c4a6a423b5104cc"},"schema_version":"1.0","source":{"id":"1307.6304","kind":"arxiv","version":1}},"canonical_sha256":"d2c30d67c304b537627079f09155460da474e1770e0f8f59c22c3238b3f1e151","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d2c30d67c304b537627079f09155460da474e1770e0f8f59c22c3238b3f1e151","first_computed_at":"2026-05-18T01:48:40.799362Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:40.799362Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kf0utPznfXHVFj1GlrFE/eYQTaWKkpcDv44JBAVPlHfPmNLI/zCIrIhvCVET35gweI1fBQvTYtnV0+gWk3/+AA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:40.799882Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.6304","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:038771f9e5164940c040b3fcc76bdb18b71d85f7622f8323030e1228a36f4015","sha256:802d6fdeb59a4f02bddb16b41729a88d382604516dd9ef62349d1c264a72ba19"],"state_sha256":"5fcd418d7f06e05c2e204dfa4c982aa1846c5a502039bafb5853979e2a188855"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"frKrmY8y7FRSKO3JHKOB4GA0B4FyEvDbIcCVG58bUA++1U6VA4Agv9xN4zVmOxh5omW17B1mLNqcD3WQ8seTCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T15:10:00.660418Z","bundle_sha256":"b597cace937c13711437557e27d82095cc524ddee8d59600c0e2b0a91db0f866"}}