{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:6JCFMIXPCFTDESMWPAXMCDYBDK","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":"4fb807b0cad7af0793e7473306af83e70bccf16bdf5761c6d86ce1fdd6774253","cross_cats_sorted":["physics.optics","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2020-07-14T13:43:19Z","title_canon_sha256":"e9201784e3b2d407cc295688922cccbe7c4081d022d74688634de23da4e65439"},"schema_version":"1.0","source":{"id":"2007.07756","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.07756","created_at":"2026-07-05T01:33:41Z"},{"alias_kind":"arxiv_version","alias_value":"2007.07756v2","created_at":"2026-07-05T01:33:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.07756","created_at":"2026-07-05T01:33:41Z"},{"alias_kind":"pith_short_12","alias_value":"6JCFMIXPCFTD","created_at":"2026-07-05T01:33:41Z"},{"alias_kind":"pith_short_16","alias_value":"6JCFMIXPCFTDESMW","created_at":"2026-07-05T01:33:41Z"},{"alias_kind":"pith_short_8","alias_value":"6JCFMIXP","created_at":"2026-07-05T01:33:41Z"}],"graph_snapshots":[{"event_id":"sha256:bf09f62555231f543116cb1ad583565848b62b1f46a500a2285d1cf177aa2652","target":"graph","created_at":"2026-07-05T01:33:41Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2007.07756/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A compact setup for two-way single-photon-level frequency conversion between 852 nm and 1560 nm has been implemented with the same periodically-poled magnesium-oxide-doped lithium niobate (PPMgO:LN) bulk crystals for connecting cesium D2 line (852 nm) to telecom C-band. By single-pass mixing a strong continuous-wave pump laser at 1878 nm and the single-photon-level periodical signal pulses in a 50-mm-long PPMgO:LN bulk crystal, the conversion efficiency of ~1.7% ( ~1.9%) for 852-nm to 1560-nm down-conversion (1560-nm to 852-nm up-conversion) have been achieved. We analyzed noise photons induce","authors_text":"Jun He, Junmin Wang, Kong Zhang","cross_cats":["physics.optics","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2020-07-14T13:43:19Z","title":"Two-way single-photon-level frequency conversion between 852nm and 1560nm for connecting cesium D2 line with the telecom C-band"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.07756","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":"sha256:7a6b0da0c5a4cd5733553782cfcd36245ecd6356fb137ab46b30489ff83b7427","target":"record","created_at":"2026-07-05T01:33:41Z","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":"4fb807b0cad7af0793e7473306af83e70bccf16bdf5761c6d86ce1fdd6774253","cross_cats_sorted":["physics.optics","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2020-07-14T13:43:19Z","title_canon_sha256":"e9201784e3b2d407cc295688922cccbe7c4081d022d74688634de23da4e65439"},"schema_version":"1.0","source":{"id":"2007.07756","kind":"arxiv","version":2}},"canonical_sha256":"f2445622ef1166324996782ec10f011ab0cd1eaf23320d2060f4be364a8cee44","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2445622ef1166324996782ec10f011ab0cd1eaf23320d2060f4be364a8cee44","first_computed_at":"2026-07-05T01:33:41.256958Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:33:41.256958Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cMaE8dk82KxGRzZJKDXSoJqqAJBIfk20pPmD6Iz30SwxdeZhdGHeO6dfFlN3nuXLWAzXTuRR6o6PyEGJgIHlDA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:33:41.257371Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.07756","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7a6b0da0c5a4cd5733553782cfcd36245ecd6356fb137ab46b30489ff83b7427","sha256:bf09f62555231f543116cb1ad583565848b62b1f46a500a2285d1cf177aa2652"],"state_sha256":"158763770f1802345ef6ae66da6b045dcfb83c1a3b619d273ada36f6fee026b5"}