{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:JOODGHTEPIPBAV6PS2VP37TRFP","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":"fcce1031ed4e57e19b2556512d71104a7b9afdfe65863de1b902f6bdd7f07feb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-11T10:21:17Z","title_canon_sha256":"66297295096271630d5b1d4cc7902ed18159c523642e9decd6df368db00ca0d4"},"schema_version":"1.0","source":{"id":"1407.3094","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.3094","created_at":"2026-05-18T02:41:18Z"},{"alias_kind":"arxiv_version","alias_value":"1407.3094v2","created_at":"2026-05-18T02:41:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.3094","created_at":"2026-05-18T02:41:18Z"},{"alias_kind":"pith_short_12","alias_value":"JOODGHTEPIPB","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"JOODGHTEPIPBAV6P","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"JOODGHTE","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:82fb805bd58b4a4650942bf3bb0c5d6073db840d2a57319470c0a2861d5ec723","target":"graph","created_at":"2026-05-18T02:41:18Z","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 an experiment that demonstrates the frequency up-conversion of telecommunication wavelength single-photon-level pulses to be resonant with a $\\mathrm{Pr}^{3+}$:$\\mathrm{Y}_2\\mathrm{Si}\\mathrm{O}_5$ crystal. We convert the telecom photons at $1570\\,\\mathrm{nm}$ to $606\\,\\mathrm{nm}$ using a periodically-poled potassium titanyl phosphate nonlinear waveguide. The maximum device efficiency (which includes all optical loss) is inferred to be $\\eta_{\\mathrm{dev}}^{\\mathrm{max}} = 22 \\pm 1\\,%$ (internal efficiency $\\eta_{\\mathrm{int}} = 75\\pm8\\,%$) with a signal to noise ratio exceeding ","authors_text":"Hugues de Riedmatten, Joachim Cohen, Kutlu Kutluer, Margherita Mazzera, Matteo Cristiani, Nicolas Maring, Patrick M. Ledingham","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-11T10:21:17Z","title":"Storage of up-converted telecom photons in a doped crystal"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.3094","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":"sha256:2f498c7d858951693e6be00b0b96a81202f0bed5f8251c61b81052d7c2f25ea9","target":"record","created_at":"2026-05-18T02:41:18Z","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":"fcce1031ed4e57e19b2556512d71104a7b9afdfe65863de1b902f6bdd7f07feb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-11T10:21:17Z","title_canon_sha256":"66297295096271630d5b1d4cc7902ed18159c523642e9decd6df368db00ca0d4"},"schema_version":"1.0","source":{"id":"1407.3094","kind":"arxiv","version":2}},"canonical_sha256":"4b9c331e647a1e1057cf96aafdfe712bd6053712f5d5ec904f4d742305479e25","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4b9c331e647a1e1057cf96aafdfe712bd6053712f5d5ec904f4d742305479e25","first_computed_at":"2026-05-18T02:41:18.452521Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:41:18.452521Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uFZTyKtodhTUs7yIDHRPEb1Vw56lq3oS7RdvM+I0FY6CDmoGVp3CM9QX0ppeIMlvEEGTLts6XQZGtXi1kaGIDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:41:18.452973Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.3094","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2f498c7d858951693e6be00b0b96a81202f0bed5f8251c61b81052d7c2f25ea9","sha256:82fb805bd58b4a4650942bf3bb0c5d6073db840d2a57319470c0a2861d5ec723"],"state_sha256":"22f2b94cd2ba5f1a1e2ca9cfafef720218abf3e63d463dd81266d76e2d0e8427"}