{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:E4PM7S5XZKGFLAJSKB5XWRZO6N","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":"5f1934916eb5480fd4ba1fa14ed5f10b8b11f62353492e825fcf51ce41f7ea00","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-01-11T11:51:42Z","title_canon_sha256":"6e7b056f968f186c7e935ba18a66f655ba13aa90bc9615af796c537f3eae23d1"},"schema_version":"1.0","source":{"id":"1801.03727","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.03727","created_at":"2026-05-17T23:49:33Z"},{"alias_kind":"arxiv_version","alias_value":"1801.03727v2","created_at":"2026-05-17T23:49:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.03727","created_at":"2026-05-17T23:49:33Z"},{"alias_kind":"pith_short_12","alias_value":"E4PM7S5XZKGF","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"E4PM7S5XZKGFLAJS","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"E4PM7S5X","created_at":"2026-05-18T12:32:19Z"}],"graph_snapshots":[{"event_id":"sha256:5812cd1e6ef4a7f5fe9270f862ac518b8f57181ceabc79614e5d354071842086","target":"graph","created_at":"2026-05-17T23:49:33Z","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 report on quantum frequency conversion of memory-compatible narrow-bandwidth photons at 606 nm to the telecom C-band at 1552$\\,$nm. The 200$\\,$ns long photons, compatible with Praseodymium-based solid-state quantum memories are frequency converted using a single-step difference frequency generation process in a periodically poled Lithium Niobate waveguide. We characterize the noise processes involved in the conversion and by applying strong spectral filtering of the noise, we demonstrate high signal-to-noise ratio conversion at the single photon level (SNR$\\,>\\,$100 for a mean input photon ","authors_text":"Andreas Lenhard, Dario Lago-Rivera, Georg Heinze, Hugues de Riedmatten, Nicolas Maring","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-01-11T11:51:42Z","title":"Quantum frequency conversion of memory-compatible single photons from 606 nm to the telecom C-band"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03727","kind":"arxiv","version":2},"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":"sha256:169ec02c376e74de9c3417b8295fbca7c6eb1c25249c7848733b3b70afadbc24","target":"record","created_at":"2026-05-17T23:49:33Z","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":"5f1934916eb5480fd4ba1fa14ed5f10b8b11f62353492e825fcf51ce41f7ea00","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-01-11T11:51:42Z","title_canon_sha256":"6e7b056f968f186c7e935ba18a66f655ba13aa90bc9615af796c537f3eae23d1"},"schema_version":"1.0","source":{"id":"1801.03727","kind":"arxiv","version":2}},"canonical_sha256":"271ecfcbb7ca8c558132507b7b472ef36125c33f203eca24c0e2923e29e66581","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"271ecfcbb7ca8c558132507b7b472ef36125c33f203eca24c0e2923e29e66581","first_computed_at":"2026-05-17T23:49:33.711289Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:33.711289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YYJ9l+1GU2idtRVnIM2j+Lwz2tDywREJr4bdv21tJ8IsyMTzfdjYYVTQ2s9qHOSg3b5m//Lpo5lLMaUIihEMCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:33.711905Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.03727","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:169ec02c376e74de9c3417b8295fbca7c6eb1c25249c7848733b3b70afadbc24","sha256:5812cd1e6ef4a7f5fe9270f862ac518b8f57181ceabc79614e5d354071842086"],"state_sha256":"c67466384f2ede8c1c78e20e516ab0b3d6a779f2710286ac9c2435e19d2a534e"}