{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:WHVPEDMT37W57KNGGOXQ2FO32I","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":"6815a6772b863097340ec8c77c26f4e52ac8814d64743577e09115709b939aae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-12-01T16:24:37Z","title_canon_sha256":"d5bba0b0c44e46e867238ea6995cef975637178be4c30af02fed9323b4c4a3de"},"schema_version":"1.0","source":{"id":"1612.00335","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.00335","created_at":"2026-05-18T00:32:21Z"},{"alias_kind":"arxiv_version","alias_value":"1612.00335v3","created_at":"2026-05-18T00:32:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.00335","created_at":"2026-05-18T00:32:21Z"},{"alias_kind":"pith_short_12","alias_value":"WHVPEDMT37W5","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"WHVPEDMT37W57KNG","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"WHVPEDMT","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:a7b9b45d654119f48c66febfd62f0c348e712ef52c481e3c56aa758730223464","target":"graph","created_at":"2026-05-18T00:32:21Z","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 existing methods for measuring the orbital-angular-momentum (OAM) spectrum suffer from issues such as poor efficiency, strict interferometric stability requirements, and too much loss. Furthermore, most techniques inevitably discard part of the field and measure only a post-selected portion of the true spectrum. Here, we propose and demonstrate an interferometric technique for measuring the true OAM spectrum of optical fields in a single-shot manner. Our technique directly encodes the OAM-spectrum information in the azimuthal intensity profile of the output interferogram. In the absence of","authors_text":"Anand K. Jha, Girish Kulkarni, Omar S. Magana-Loaiza, Rishabh Sahu, Robert. W. Boyd","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-12-01T16:24:37Z","title":"Single-shot measurement of the orbital-angular-momentum spectrum of light"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.00335","kind":"arxiv","version":3},"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":"sha256:4c95b062db925c22d73685e0c566f65b9865e20d6e5dc4b553cf240fd1c0b7ab","target":"record","created_at":"2026-05-18T00:32:21Z","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":"6815a6772b863097340ec8c77c26f4e52ac8814d64743577e09115709b939aae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-12-01T16:24:37Z","title_canon_sha256":"d5bba0b0c44e46e867238ea6995cef975637178be4c30af02fed9323b4c4a3de"},"schema_version":"1.0","source":{"id":"1612.00335","kind":"arxiv","version":3}},"canonical_sha256":"b1eaf20d93dfeddfa9a633af0d15dbd23ade97f74eb923af1b4d396762f3b5c5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b1eaf20d93dfeddfa9a633af0d15dbd23ade97f74eb923af1b4d396762f3b5c5","first_computed_at":"2026-05-18T00:32:21.025458Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:21.025458Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2iWibzF8Nq6jVw2e4c5a8Y1+eTQPz7pyf+TwLP7HyXuADy0jiEQAutSKFtNpkxa+xzPdyhA5qCyHUE9CivlvAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:21.025971Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.00335","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4c95b062db925c22d73685e0c566f65b9865e20d6e5dc4b553cf240fd1c0b7ab","sha256:a7b9b45d654119f48c66febfd62f0c348e712ef52c481e3c56aa758730223464"],"state_sha256":"ee6ad9894fc621d4109bb137edbb6cd08ed2e9e3a5253784961adbbf0ed49fd7"}