{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:K4VGKODWGLWK22FDPWNQSIFODY","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":"aa0f9d3b59e193c666ec7ec1431ca5c85dba6e590fbc44bbd4b27a4a4dc02874","cross_cats_sorted":["physics.atom-ph","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-09-04T20:44:20Z","title_canon_sha256":"23b9eaa0dda4b28a2fe8e2873160a1c8668d6cab78b709ed6d9ea9b2fa7d4d83"},"schema_version":"1.0","source":{"id":"1409.1602","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.1602","created_at":"2026-05-18T02:02:08Z"},{"alias_kind":"arxiv_version","alias_value":"1409.1602v2","created_at":"2026-05-18T02:02:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.1602","created_at":"2026-05-18T02:02:08Z"},{"alias_kind":"pith_short_12","alias_value":"K4VGKODWGLWK","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"K4VGKODWGLWK22FD","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"K4VGKODW","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:04a76b11b6a28f72987959f76411b961ee2d441700d22449af1627f2c938b439","target":"graph","created_at":"2026-05-18T02:02:08Z","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 central aim of quantum information processing is the efficient entanglement of multiple stationary quantum memories via photons. Among solid-state systems, the nitrogen-vacancy (NV) centre in diamond has emerged as an excellent optically addressable memory with second-scale electron spin coherence times. Recently, quantum entanglement and teleportation have been shown between two NV-memories, but scaling to larger networks requires more efficient spin-photon interfaces such as optical resonators. Here, we demonstrate such NV-nanocavity systems with optical quality factors approaching 10,000 ","authors_text":"Daniel J. Twitchen, Dirk Englund, Edward H. Chen, Igal Bayn, Jacob Mower, Jordan Goldstein, Luozhou Li, Matthew E. Trusheim, Matthew L. Markham, Michael Walsh, Ming Lu, Mircea Cotlet, Ophir Gaathon, Tim Schr\\\"oder","cross_cats":["physics.atom-ph","physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-09-04T20:44:20Z","title":"Coherent spin control of a nanocavity-enhanced qubit in diamond"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.1602","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:d03369c6fba5a3f5d3f6e052c8fcb193b521437640dd67de0780d59966e0dc05","target":"record","created_at":"2026-05-18T02:02:08Z","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":"aa0f9d3b59e193c666ec7ec1431ca5c85dba6e590fbc44bbd4b27a4a4dc02874","cross_cats_sorted":["physics.atom-ph","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-09-04T20:44:20Z","title_canon_sha256":"23b9eaa0dda4b28a2fe8e2873160a1c8668d6cab78b709ed6d9ea9b2fa7d4d83"},"schema_version":"1.0","source":{"id":"1409.1602","kind":"arxiv","version":2}},"canonical_sha256":"572a65387632ecad68a37d9b0920ae1e36d2cb2300f485c80b5ffdb9246a4500","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"572a65387632ecad68a37d9b0920ae1e36d2cb2300f485c80b5ffdb9246a4500","first_computed_at":"2026-05-18T02:02:08.281757Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:08.281757Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7sWQDYvLycydLj1l3j3AawdwTtkaqXG30QZVDulAJmAMoYHNDyJ1Fvmz0YXrl6j+Z7jBd4/n1iw1Ac/Qp/xUAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:08.282543Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.1602","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d03369c6fba5a3f5d3f6e052c8fcb193b521437640dd67de0780d59966e0dc05","sha256:04a76b11b6a28f72987959f76411b961ee2d441700d22449af1627f2c938b439"],"state_sha256":"6d1efb13441e7c5bc2539ace2f3526e9aee3864e1feb9ef52a5a93c7c9c02414"}