{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:6ABPFRKR6CLYQSR6LTRQF3YGFM","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":"0c9b527dc69fa64ff895296aea20c3de4dc389e79d818537ad49be4ce75ae6ec","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2007-10-17T07:55:08Z","title_canon_sha256":"050804969c90a72bdfee4d23dbf6d750e235ec1ff08e028bbbcbb067d83ec2fa"},"schema_version":"1.0","source":{"id":"0710.3231","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0710.3231","created_at":"2026-05-18T04:19:23Z"},{"alias_kind":"arxiv_version","alias_value":"0710.3231v1","created_at":"2026-05-18T04:19:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0710.3231","created_at":"2026-05-18T04:19:23Z"},{"alias_kind":"pith_short_12","alias_value":"6ABPFRKR6CLY","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"6ABPFRKR6CLYQSR6","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"6ABPFRKR","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:39d39438ac644361058b0c0f84d28bd2732b0b1cd7ba107b030b6b6d97985a57","target":"graph","created_at":"2026-05-18T04:19:23Z","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":"A thulium-doped crystal is experimentally shown to be an excellent candidate for broadband quantum storage in a solid-state medium. For the first time, nuclear spin coherence is optically excited, detected and characterized in such a crystal. The lifetime of the spin coherence -- the potential storage entity -- is measured by means of Raman echo to be about 300 $\\mu$s over a wide range of ground state splittings. This flexibility, attractive for broadband operation, and well fitted to existing quantum sources, results from the simple hyperfine structure, contrasting with Pr- and Eu- doped crys","authors_text":"Anne Louchet (LAC), Fabien Bretenaker (LAC), Fabienne Goldfarb (LAC), Ivan Lorger\\'e (LAC), Jean-Louis Le Gou\\\"et (LAC), Olivier Guillot-No\\\"el (CMCP - Paris VI), Philippe Goldner (CMCP - Paris VI), Thierry Chaneli\\`ere (LAC), Yann Le Du (LAC)","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"2007-10-17T07:55:08Z","title":"Optical Excitation of Nuclear Spin Coherence in Tm3+:YAG"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0710.3231","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:eb8cde22c5b9755675f0f8697d3a899abb79a9d14b6d915cf4dce6c94fefbc67","target":"record","created_at":"2026-05-18T04:19:23Z","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":"0c9b527dc69fa64ff895296aea20c3de4dc389e79d818537ad49be4ce75ae6ec","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2007-10-17T07:55:08Z","title_canon_sha256":"050804969c90a72bdfee4d23dbf6d750e235ec1ff08e028bbbcbb067d83ec2fa"},"schema_version":"1.0","source":{"id":"0710.3231","kind":"arxiv","version":1}},"canonical_sha256":"f002f2c551f097884a3e5ce302ef062b1c7f2684f7de0475bc79a243291071c3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f002f2c551f097884a3e5ce302ef062b1c7f2684f7de0475bc79a243291071c3","first_computed_at":"2026-05-18T04:19:23.566665Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:19:23.566665Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GmmNpgHEE0/Egl1fyYHar0+5RK52SemkVkzfioFDu0aRe3BL+dENu5oitEJZMAKn9haVkk1QpQvc1BeF7J1iDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:19:23.567029Z","signed_message":"canonical_sha256_bytes"},"source_id":"0710.3231","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb8cde22c5b9755675f0f8697d3a899abb79a9d14b6d915cf4dce6c94fefbc67","sha256:39d39438ac644361058b0c0f84d28bd2732b0b1cd7ba107b030b6b6d97985a57"],"state_sha256":"2506d41dfc49d34c6476d240561bfc6bf8bbd3f62d07ee1c05fe0288edd03e42"}