{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:VIOPWTX22XAWNNPHEKKJZXO7NY","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":"a0033bb0d5e8093504cb1607d8db7efe8237032f771fe56a11c31daec1903984","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-09-23T13:05:34Z","title_canon_sha256":"e33623a125f5d70e0f145733024e3c785d40d6db4c7483f168d544d06087bbb2"},"schema_version":"1.0","source":{"id":"1409.6521","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.6521","created_at":"2026-05-18T01:30:35Z"},{"alias_kind":"arxiv_version","alias_value":"1409.6521v2","created_at":"2026-05-18T01:30:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.6521","created_at":"2026-05-18T01:30:35Z"},{"alias_kind":"pith_short_12","alias_value":"VIOPWTX22XAW","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"VIOPWTX22XAWNNPH","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"VIOPWTX2","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:c6bd6055e24efdfd14da10cb40a51e2113429de0e8385dabdd6e4b6d39c432b1","target":"graph","created_at":"2026-05-18T01:30:35Z","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":"The quantum state of the emitted light from the cascade recombination of a biexciton in a quantum dot is theoretically investigated including exciton fine structure splitting (FSS) and electron-nuclear spin hyperfine interactions. In an ideal situation, the emitted photons are entangled in polarization making the biexciton recombination process a candidate source of entangled photons necessary for the growing field of quantum communication and computation. The coherence of the exciton states in real quantum dots is affected by a finite FSS and the hyperfine interactions via the effective magne","authors_text":"Erik Welander, Guido Burkard, Julia Hildmann","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-09-23T13:05:34Z","title":"Influence of Hyperfine Interaction on the Entanglement of Photons Generated by Biexciton Recombination"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.6521","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":"sha256:5bc58801f5668785ddabaa1de417e736122769229439d1a1ad8716ae8eb7235f","target":"record","created_at":"2026-05-18T01:30:35Z","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":"a0033bb0d5e8093504cb1607d8db7efe8237032f771fe56a11c31daec1903984","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-09-23T13:05:34Z","title_canon_sha256":"e33623a125f5d70e0f145733024e3c785d40d6db4c7483f168d544d06087bbb2"},"schema_version":"1.0","source":{"id":"1409.6521","kind":"arxiv","version":2}},"canonical_sha256":"aa1cfb4efad5c166b5e722949cdddf6e05726bc43ac9ad2cdea861a024d7c12a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aa1cfb4efad5c166b5e722949cdddf6e05726bc43ac9ad2cdea861a024d7c12a","first_computed_at":"2026-05-18T01:30:35.222635Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:30:35.222635Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DO9CGOo1jF1/cfMSxt8/B433fEE4wE8nwXL02THU1FzDiX93iB2nxwlkAta5wTNDUVCnbW3PpgNwARObNhCjAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:30:35.223345Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.6521","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bc58801f5668785ddabaa1de417e736122769229439d1a1ad8716ae8eb7235f","sha256:c6bd6055e24efdfd14da10cb40a51e2113429de0e8385dabdd6e4b6d39c432b1"],"state_sha256":"689c90c905d7ce3d5fc94f7faa6edb7c15e75e7820065c9159f47b8c39c1d4e9"}