{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:H4CNZXBWQNO5Z7V4DUI3SU3SFG","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":"b38a410f7c6a9f0151ce47e5530dc072aa2057b90b45828228b97e172a90f2ca","cross_cats_sorted":[],"license":"","primary_cat":"physics.optics","submitted_at":"2003-11-14T20:37:05Z","title_canon_sha256":"63c885169895ab2f3c4491ce9893522bba6e593b13a7bc3069fe9b4f428bd954"},"schema_version":"1.0","source":{"id":"physics/0311070","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0311070","created_at":"2026-05-18T04:17:54Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0311070v1","created_at":"2026-05-18T04:17:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0311070","created_at":"2026-05-18T04:17:54Z"},{"alias_kind":"pith_short_12","alias_value":"H4CNZXBWQNO5","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"H4CNZXBWQNO5Z7V4","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"H4CNZXBW","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:aaca793401fb1eac73964f153bb703ebd683f4bd35e3b7cbed5f05f5d4eb22e8","target":"graph","created_at":"2026-05-18T04:17:54Z","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 study theoretically and experimentally the modulational instability of broad optical beams in photorefractive nonlinear media. We demonstrate the impact of the anisotropy of the nonlinearity on the growth rate of periodic perturbations. Our findings are confirmed by experimental measurements in a strontium barium niobate photorefractive crystal.","authors_text":"Glen McCarthy, M. Saffman, Wieslaw Kr\\'olikowski","cross_cats":[],"headline":"","license":"","primary_cat":"physics.optics","submitted_at":"2003-11-14T20:37:05Z","title":"Two dimensional modulational instability in photorefractive media"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0311070","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:f0cb2a3ec626c5aa9486517c381bbc0493f6fded1735125644f2579fc122034e","target":"record","created_at":"2026-05-18T04:17:54Z","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":"b38a410f7c6a9f0151ce47e5530dc072aa2057b90b45828228b97e172a90f2ca","cross_cats_sorted":[],"license":"","primary_cat":"physics.optics","submitted_at":"2003-11-14T20:37:05Z","title_canon_sha256":"63c885169895ab2f3c4491ce9893522bba6e593b13a7bc3069fe9b4f428bd954"},"schema_version":"1.0","source":{"id":"physics/0311070","kind":"arxiv","version":1}},"canonical_sha256":"3f04dcdc36835ddcfebc1d11b95372299e85366d3441aa8ff703830e208ae5e8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3f04dcdc36835ddcfebc1d11b95372299e85366d3441aa8ff703830e208ae5e8","first_computed_at":"2026-05-18T04:17:54.266117Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:17:54.266117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0/pQ38rhJcSK/0JPk179ry28nak4Qta3qbZq0/pGdj46jO12HGEd2zx1ZdKnk6m1MB/tUdFn8MFp6c30NbddCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:17:54.266716Z","signed_message":"canonical_sha256_bytes"},"source_id":"physics/0311070","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f0cb2a3ec626c5aa9486517c381bbc0493f6fded1735125644f2579fc122034e","sha256:aaca793401fb1eac73964f153bb703ebd683f4bd35e3b7cbed5f05f5d4eb22e8"],"state_sha256":"4058f4927defe77566b52969901fb9a15cfc9b67a10ac0ff9cd51c747ff24079"}