{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:JUJKSBFYJR5HZEORG3KOCYXH3S","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":"8ddfe22fe5bb9fa0ad8aa559ceb57748cc34ec428889d143fc65ef28ba01d023","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-26T23:30:25Z","title_canon_sha256":"50bfe15a6d352689735131ca678add375ca0b3ac33124151615b4cb3498822da"},"schema_version":"1.0","source":{"id":"1109.5739","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.5739","created_at":"2026-05-18T04:11:20Z"},{"alias_kind":"arxiv_version","alias_value":"1109.5739v3","created_at":"2026-05-18T04:11:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.5739","created_at":"2026-05-18T04:11:20Z"},{"alias_kind":"pith_short_12","alias_value":"JUJKSBFYJR5H","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"JUJKSBFYJR5HZEOR","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"JUJKSBFY","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:9b383462def9986412223a92b5c8c67babc7eb0f26c649ed8f2cf7197ba8dcbb","target":"graph","created_at":"2026-05-18T04:11:20Z","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":"Using collective atom phase control a population inversion-free photon echo scheme has been studied for quantum memory applications. For the inversion-free photon echoes a double rephasing method is combined with optical locking, where the optical locking coherently controls each atom phase excited by weak data pulses. As a result, intensity flattened, normally ordered, storage time-extended, and noise-free photon echoes are obtained.","authors_text":"B. S. Ham","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-26T23:30:25Z","title":"Collective atom phase-controlled noise-free photon echoes using double rephasing and optical locking"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.5739","kind":"arxiv","version":3},"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":"sha256:91d9e18a94841f054a9436fbbdd2a5fe62712df4401ea10f8ccfab1166d55de1","target":"record","created_at":"2026-05-18T04:11:20Z","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":"8ddfe22fe5bb9fa0ad8aa559ceb57748cc34ec428889d143fc65ef28ba01d023","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-26T23:30:25Z","title_canon_sha256":"50bfe15a6d352689735131ca678add375ca0b3ac33124151615b4cb3498822da"},"schema_version":"1.0","source":{"id":"1109.5739","kind":"arxiv","version":3}},"canonical_sha256":"4d12a904b84c7a7c91d136d4e162e7dc880141f34a3ea908766043be61d442c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4d12a904b84c7a7c91d136d4e162e7dc880141f34a3ea908766043be61d442c9","first_computed_at":"2026-05-18T04:11:20.044544Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:11:20.044544Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LgEC7aC30S2tiurWI81R36M6Hn0tz7Oat+1j6MJzkPIfU7yDz272PDXK4lTEO5iA8XrAHAvZQvLfQ3YSbr7bDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:11:20.045004Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.5739","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:91d9e18a94841f054a9436fbbdd2a5fe62712df4401ea10f8ccfab1166d55de1","sha256:9b383462def9986412223a92b5c8c67babc7eb0f26c649ed8f2cf7197ba8dcbb"],"state_sha256":"5c30541679d6a03d2e8b7009ec9a6345b38237e7ee76ac6ac066ed9fad9eca36"}