{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:TB7CZ3DN2RHZSWHGIGQLCHIS22","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":"91a6390f0410ef8f4ccee0eefc930d52364288191c3a31aa4031c9608954c08d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-08-21T18:43:27Z","title_canon_sha256":"be13dbe626c5293636f34b591d94753f13ad0b7bd8fee634a18abacfc991ce79"},"schema_version":"1.0","source":{"id":"1508.05362","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.05362","created_at":"2026-05-18T01:17:12Z"},{"alias_kind":"arxiv_version","alias_value":"1508.05362v1","created_at":"2026-05-18T01:17:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.05362","created_at":"2026-05-18T01:17:12Z"},{"alias_kind":"pith_short_12","alias_value":"TB7CZ3DN2RHZ","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TB7CZ3DN2RHZSWHG","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TB7CZ3DN","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:ce48f15a8cfa736daa4e61b1bd894a745766b644c172ba7671d8f52a84de771b","target":"graph","created_at":"2026-05-18T01:17:12Z","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":"Spectral diffusion arising from $^{29}$Si nuclear spin flip-flops, known to be a primary source of electron spin decoherence in silicon, is also predicted to limit the coherence times of neutral donor nuclear spins in silicon. Here, the impact of this mechanism on $^{31}$P nuclear spin coherence is measured as a function of $^{29}$Si concentration using X-band pulsed electron nuclear double resonance (ENDOR). The $^{31}$P nuclear spin echo decays show that decoherence is controlled by $^{29}$Si flip-flops resulting in both fast (exponential) and slow (non-exponential) spectral diffusion proces","authors_text":"Alexei M. Tyryshkin, Eisuke Abe, Evan S. Petersen, John J. L. Morton, Kohei M. Itoh, Mike L. W. Thewalt, Shinichi Tojo, Stephen A. Lyon","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-08-21T18:43:27Z","title":"Nuclear spin decoherence of neutral $^{31}$P donors in silicon: Effect of environmental $^{29}$Si nuclei"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.05362","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:d03087102f4ed46366c28947b8789633fff1244f66fc7e1012bd437b204c19c8","target":"record","created_at":"2026-05-18T01:17:12Z","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":"91a6390f0410ef8f4ccee0eefc930d52364288191c3a31aa4031c9608954c08d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-08-21T18:43:27Z","title_canon_sha256":"be13dbe626c5293636f34b591d94753f13ad0b7bd8fee634a18abacfc991ce79"},"schema_version":"1.0","source":{"id":"1508.05362","kind":"arxiv","version":1}},"canonical_sha256":"987e2cec6dd44f9958e641a0b11d12d6b3f3cd43ddd237664c3152ad86672b1b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"987e2cec6dd44f9958e641a0b11d12d6b3f3cd43ddd237664c3152ad86672b1b","first_computed_at":"2026-05-18T01:17:12.737995Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:17:12.737995Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rIozeyehYRzwwKBjdnLDnybR8WcSDXV1WeInr9gnRN3BqjofAIdTjZ0sjMieP4cIUOpezWIzRqJqORkiA1cVCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:17:12.738676Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.05362","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d03087102f4ed46366c28947b8789633fff1244f66fc7e1012bd437b204c19c8","sha256:ce48f15a8cfa736daa4e61b1bd894a745766b644c172ba7671d8f52a84de771b"],"state_sha256":"15bad5ba700848aabbfef4f287eadb7257de825516b72c0d253e5aa66425f56f"}