{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:R34L42QFZ7L5YC6Y2BW6TRIYBM","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":"c669d38d1e0e0153c374db83b93c4f5919b8784f6a9374ceed201d935a007d10","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-01-24T16:50:11Z","title_canon_sha256":"0cdad81c21c50cd4ccd510e9417e67bb76bd4af3506ce29ff060044023e0e462"},"schema_version":"1.0","source":{"id":"1801.08069","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.08069","created_at":"2026-05-18T00:16:44Z"},{"alias_kind":"arxiv_version","alias_value":"1801.08069v1","created_at":"2026-05-18T00:16:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.08069","created_at":"2026-05-18T00:16:44Z"},{"alias_kind":"pith_short_12","alias_value":"R34L42QFZ7L5","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"R34L42QFZ7L5YC6Y","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"R34L42QF","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:56b9542c850e48e28c02e111cf164b0827ef520ffcc21d5e347f6b7ead942e97","target":"graph","created_at":"2026-05-18T00:16:44Z","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":"Backward stimulated Raman scattering in gases provides a promising route to compression and amplification of a Stokes seed-pulse by counter-propagating against a pump-pulse, as has been already demonstrated in various platforms, mainly in free-space. However, the dynamics governing this process when seeded by noise has not yet been investigated in a fully controllable collinear environment. Here we report the first unambiguous observation of efficient noise-seeded backward stimulated Raman scattering in a hydrogen-filled hollow-core photonic crystal fiber. At high gas pressures, when the backw","authors_text":"David Novoa, Manoj K. Mridha, Philip St. J. Russell","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-01-24T16:50:11Z","title":"Dominance of backward stimulated Raman scattering in gas-filled hollow-core photonic crystal fibers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.08069","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:eb514ac9e049b0fd369cf47fb8f2dc8cb289a6744a5b317680331f3194c768b6","target":"record","created_at":"2026-05-18T00:16:44Z","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":"c669d38d1e0e0153c374db83b93c4f5919b8784f6a9374ceed201d935a007d10","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-01-24T16:50:11Z","title_canon_sha256":"0cdad81c21c50cd4ccd510e9417e67bb76bd4af3506ce29ff060044023e0e462"},"schema_version":"1.0","source":{"id":"1801.08069","kind":"arxiv","version":1}},"canonical_sha256":"8ef8be6a05cfd7dc0bd8d06de9c5180b3bc617f16c7a9e6f4a061a8e28b34530","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ef8be6a05cfd7dc0bd8d06de9c5180b3bc617f16c7a9e6f4a061a8e28b34530","first_computed_at":"2026-05-18T00:16:44.304815Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:16:44.304815Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nbSvl+zKLqiQ6/1Y+djTBP/o6jVQ38I58fW/sN9bI/ppvACB8xQv/E1nvviXSwqHcEBgIWBfC9cCRRORZyW2Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:16:44.305271Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.08069","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb514ac9e049b0fd369cf47fb8f2dc8cb289a6744a5b317680331f3194c768b6","sha256:56b9542c850e48e28c02e111cf164b0827ef520ffcc21d5e347f6b7ead942e97"],"state_sha256":"5e243a6482e09185aace41974b2a98c435c05c6cdd3455a277b73c0d1c538df3"}