{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:J2VOZ6GB2NDP7ILSAXACJA2A6F","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":"f34d26b2c4381608603307334428618150424cd0ca28df763bbe4ebda693b194","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-04-12T13:22:42Z","title_canon_sha256":"d2d1034e33492d0164b70268905dd2fdfdda79b4521c8272589401e0f56f68a8"},"schema_version":"1.0","source":{"id":"1304.3632","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.3632","created_at":"2026-05-18T02:51:15Z"},{"alias_kind":"arxiv_version","alias_value":"1304.3632v1","created_at":"2026-05-18T02:51:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.3632","created_at":"2026-05-18T02:51:15Z"},{"alias_kind":"pith_short_12","alias_value":"J2VOZ6GB2NDP","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"J2VOZ6GB2NDP7ILS","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"J2VOZ6GB","created_at":"2026-05-18T12:27:49Z"}],"graph_snapshots":[{"event_id":"sha256:925803269479365b810d82c0d1868351b3dbadcaa8a04d073b3119e863b50153","target":"graph","created_at":"2026-05-18T02:51:15Z","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":"Quantum systems in mixed states can be unentangled and yet still correlated in a way that is not possible for classical systems. These correlations can be quantified by the quantum discord and might provide a resource for certain mixed-state quantum information processing tasks. Here we report on the generation of discordant states of two trapped atomic ions via Markovian decoherence processes. While entanglement is strictly non-increasing under such operations, discord can be generated in various forms. Firstly we show that, starting from two classically correlated qubits, it is possible to g","authors_text":"B. P. Lanyon, C. F. Roos, C. Hempel, M. Gessner, P. Jurcevic, R. Blatt, V. Vedral","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-04-12T13:22:42Z","title":"Generation of quantum discord between ionic qubits via noisy processes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.3632","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":"sha256:6d3e5e9578bf060eb96192aaaeaa91daa1e6e688dd5367e6cf181ee8caeda983","target":"record","created_at":"2026-05-18T02:51:15Z","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":"f34d26b2c4381608603307334428618150424cd0ca28df763bbe4ebda693b194","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-04-12T13:22:42Z","title_canon_sha256":"d2d1034e33492d0164b70268905dd2fdfdda79b4521c8272589401e0f56f68a8"},"schema_version":"1.0","source":{"id":"1304.3632","kind":"arxiv","version":1}},"canonical_sha256":"4eaaecf8c1d346ffa17205c0248340f1737de81e4e34f7918a064b3b312a923b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4eaaecf8c1d346ffa17205c0248340f1737de81e4e34f7918a064b3b312a923b","first_computed_at":"2026-05-18T02:51:15.145969Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:51:15.145969Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rKO2LqokCLduRLU/pVPuKaC8Rb0mkH+IUYLUsyNErnhF9e/40ffLSJDPit12LsaU9zEqxL+M/2HAl4prf3NABQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:51:15.146474Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.3632","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6d3e5e9578bf060eb96192aaaeaa91daa1e6e688dd5367e6cf181ee8caeda983","sha256:925803269479365b810d82c0d1868351b3dbadcaa8a04d073b3119e863b50153"],"state_sha256":"8dcab08ff28199cba1cc654f755016d8f6e1b8112b74f51c3850e0f0130f2fd3"}