{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:HEWYD3VJDKRG2TA72CMZ6FKHWC","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":"9c55d234088f8845a99db0503f3a617914e9307110d00cf814878e69db294ee2","cross_cats_sorted":["cond-mat.mtrl-sci","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-05-07T11:59:03Z","title_canon_sha256":"731aa3a261beb0c095fe7a04541e5ec0949c44675d1370b90db8b86540e34fa3"},"schema_version":"1.0","source":{"id":"1505.01673","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.01673","created_at":"2026-05-18T01:34:34Z"},{"alias_kind":"arxiv_version","alias_value":"1505.01673v2","created_at":"2026-05-18T01:34:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.01673","created_at":"2026-05-18T01:34:34Z"},{"alias_kind":"pith_short_12","alias_value":"HEWYD3VJDKRG","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"HEWYD3VJDKRG2TA7","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"HEWYD3VJ","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:b4db7786238cf8cc4158c0f4917c2208463ce3df453827d7badf274b313b55d0","target":"graph","created_at":"2026-05-18T01:34:34Z","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":"All-optical addressing and control of single solid-state based qubits allows for scalable architectures of quantum devices such as quantum networks and quantum simulators. So far, all-optical addressing of qubits was demonstrated only for color centers in diamond and quantum dots. Here, we demonstrate generation of coherent dark state of a single rare earth ion in a solid, namely a cerium ion in yttrium aluminum garnet (YAG). The dark state was formed under the condition of coherent population trapping. Furthermore, high-resolution spectroscopic studies of native and implanted single Ce ions h","authors_text":"Andreas D. Wieck, Bruno Villa, J\\\"org Wrachtrup, Kangwei Xia, Nadezhda Kukharchyk, Petr Siyushev, Rolf Reuter, Roman Kolesov, Sen Yang, Thomas Kornher, Ya Wang","cross_cats":["cond-mat.mtrl-sci","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-05-07T11:59:03Z","title":"All-optical preparation of coherent dark states of a single rare earth ion spin in a crystal"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.01673","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:af4d36fd95fa448602363980ca0fab079b6b6c7f22c36a67af67e5ca443fedda","target":"record","created_at":"2026-05-18T01:34:34Z","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":"9c55d234088f8845a99db0503f3a617914e9307110d00cf814878e69db294ee2","cross_cats_sorted":["cond-mat.mtrl-sci","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-05-07T11:59:03Z","title_canon_sha256":"731aa3a261beb0c095fe7a04541e5ec0949c44675d1370b90db8b86540e34fa3"},"schema_version":"1.0","source":{"id":"1505.01673","kind":"arxiv","version":2}},"canonical_sha256":"392d81eea91aa26d4c1fd0999f1547b08792fbd8251742b06619eba4f99870c8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"392d81eea91aa26d4c1fd0999f1547b08792fbd8251742b06619eba4f99870c8","first_computed_at":"2026-05-18T01:34:34.705812Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:34:34.705812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XlH505UFVbexfLnc82tHGbdyGSK9cxt3Hwhe/WwuEBOhRlV8b4V1IGXUspBtFmH3qRBehlE2vmQrkvwtXTmPDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:34:34.706358Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.01673","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:af4d36fd95fa448602363980ca0fab079b6b6c7f22c36a67af67e5ca443fedda","sha256:b4db7786238cf8cc4158c0f4917c2208463ce3df453827d7badf274b313b55d0"],"state_sha256":"4f0d1de156e74eade53ceafa8c00c02842d62a2a8acd360c7c647ef9d1332b1e"}