{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:UGB3LMQLBPRVECLALLMO3RY5R3","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":"d07567953ff6239498bc6b295da87d44f955b0ce466c93e3d97c143449ae6d2f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-07-12T23:12:15Z","title_canon_sha256":"bc03201ba8b336b8647dfa4ea1247ea2f58d558a6c1e15153b3f2c8c124bd12c"},"schema_version":"1.0","source":{"id":"1707.03931","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.03931","created_at":"2026-05-18T00:31:35Z"},{"alias_kind":"arxiv_version","alias_value":"1707.03931v1","created_at":"2026-05-18T00:31:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.03931","created_at":"2026-05-18T00:31:35Z"},{"alias_kind":"pith_short_12","alias_value":"UGB3LMQLBPRV","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"UGB3LMQLBPRVECLA","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"UGB3LMQL","created_at":"2026-05-18T12:31:46Z"}],"graph_snapshots":[{"event_id":"sha256:e0a66dd1c50ab9d0cf12ecc9c0b10e7de544e28d90798ae007e9bdbd564c9cb1","target":"graph","created_at":"2026-05-18T00:31:35Z","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":"Diffraction-free optical beams propagate freely without change in shape and scale. Monochromatic beams that avoid diffractive spreading require two-dimensional transverse profiles, and there are no corresponding solutions for profiles restricted to one transverse dimension. Here, we demonstrate that the temporal degree of freedom can be exploited to efficiently synthesize one-dimensional pulsed optical sheets that propagate self-similarly in free space. By introducing programmable conical (hyperbolic, parabolic, or elliptical) spectral correlations between the beam's spatio-temporal degrees of","authors_text":"Ayman F. Abouraddy, H. Esat Kondakci","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-07-12T23:12:15Z","title":"Diffraction-free space-time beams"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.03931","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":"sha256:28503f3b3e2992b005d4b4fe655d939d45d0b5f62921708c77362419de57a665","target":"record","created_at":"2026-05-18T00:31:35Z","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":"d07567953ff6239498bc6b295da87d44f955b0ce466c93e3d97c143449ae6d2f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-07-12T23:12:15Z","title_canon_sha256":"bc03201ba8b336b8647dfa4ea1247ea2f58d558a6c1e15153b3f2c8c124bd12c"},"schema_version":"1.0","source":{"id":"1707.03931","kind":"arxiv","version":1}},"canonical_sha256":"a183b5b20b0be35209605ad8edc71d8ec0fd4713764efce91dd19eed59f57216","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a183b5b20b0be35209605ad8edc71d8ec0fd4713764efce91dd19eed59f57216","first_computed_at":"2026-05-18T00:31:35.779282Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:31:35.779282Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vpeOVTexElUZKxEDeMMpDzLwH0FYPO3yeSo1BLmGsCzZ8vaDCKNiT6jJ5IpFgh0FbCnMGP6e7A6rNujH10apAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:31:35.779872Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.03931","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:28503f3b3e2992b005d4b4fe655d939d45d0b5f62921708c77362419de57a665","sha256:e0a66dd1c50ab9d0cf12ecc9c0b10e7de544e28d90798ae007e9bdbd564c9cb1"],"state_sha256":"20cdcad33150b05a8600375245a876ead18c4a06f3e5c438b48360ffc8105def"}