{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:OJCPZLOYHUBNQOZHDVEK5CIC4P","short_pith_number":"pith:OJCPZLOY","schema_version":"1.0","canonical_sha256":"7244fcadd83d02d83b271d48ae8902e3da6b7d426ad2bd4bbae9d14902526965","source":{"kind":"arxiv","id":"1810.12949","version":3},"attestation_state":"computed","paper":{"title":"A measure of quantum correlations that lies approximately between entanglement and discord","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Aaron Szasz","submitted_at":"2018-10-30T18:19:06Z","abstract_excerpt":"When a quantum system is divided into two local subsystems, measurements on the two subsystems can exhibit correlations beyond those possible in a classical joint probability distribution; these are partially explained by entanglement, and more generally by a wider class of measures such as the quantum discord. In this work, I introduce a simple thought experiment defining a new measure of quantum correlations, which I call the accord, and write the result as a minimax optimization over unitary matrices. I find the exact result for pure states as a simple function of the Schmidt coefficients a"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1810.12949","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-10-30T18:19:06Z","cross_cats_sorted":[],"title_canon_sha256":"88672a6925b90fc625294cdbc9be164300956094069fde77a191f86074570500","abstract_canon_sha256":"e5c18a16831153e4303143a03e35ba58687101f280b5b3b66d5bbfb098125f44"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:23.517914Z","signature_b64":"EvVNDUehiVVLLYKsc3RVJKhItaL/wBiwD2uQ3mkZBQteqCGVfSmDg2wCUAHCcBZepiNlfpVUFH0EwEE3Aw0SAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7244fcadd83d02d83b271d48ae8902e3da6b7d426ad2bd4bbae9d14902526965","last_reissued_at":"2026-05-17T23:43:23.517277Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:23.517277Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A measure of quantum correlations that lies approximately between entanglement and discord","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Aaron Szasz","submitted_at":"2018-10-30T18:19:06Z","abstract_excerpt":"When a quantum system is divided into two local subsystems, measurements on the two subsystems can exhibit correlations beyond those possible in a classical joint probability distribution; these are partially explained by entanglement, and more generally by a wider class of measures such as the quantum discord. In this work, I introduce a simple thought experiment defining a new measure of quantum correlations, which I call the accord, and write the result as a minimax optimization over unitary matrices. I find the exact result for pure states as a simple function of the Schmidt coefficients a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.12949","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1810.12949","created_at":"2026-05-17T23:43:23.517368+00:00"},{"alias_kind":"arxiv_version","alias_value":"1810.12949v3","created_at":"2026-05-17T23:43:23.517368+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.12949","created_at":"2026-05-17T23:43:23.517368+00:00"},{"alias_kind":"pith_short_12","alias_value":"OJCPZLOYHUBN","created_at":"2026-05-18T12:32:43.782077+00:00"},{"alias_kind":"pith_short_16","alias_value":"OJCPZLOYHUBNQOZH","created_at":"2026-05-18T12:32:43.782077+00:00"},{"alias_kind":"pith_short_8","alias_value":"OJCPZLOY","created_at":"2026-05-18T12:32:43.782077+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/OJCPZLOYHUBNQOZHDVEK5CIC4P","json":"https://pith.science/pith/OJCPZLOYHUBNQOZHDVEK5CIC4P.json","graph_json":"https://pith.science/api/pith-number/OJCPZLOYHUBNQOZHDVEK5CIC4P/graph.json","events_json":"https://pith.science/api/pith-number/OJCPZLOYHUBNQOZHDVEK5CIC4P/events.json","paper":"https://pith.science/paper/OJCPZLOY"},"agent_actions":{"view_html":"https://pith.science/pith/OJCPZLOYHUBNQOZHDVEK5CIC4P","download_json":"https://pith.science/pith/OJCPZLOYHUBNQOZHDVEK5CIC4P.json","view_paper":"https://pith.science/paper/OJCPZLOY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1810.12949&json=true","fetch_graph":"https://pith.science/api/pith-number/OJCPZLOYHUBNQOZHDVEK5CIC4P/graph.json","fetch_events":"https://pith.science/api/pith-number/OJCPZLOYHUBNQOZHDVEK5CIC4P/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/OJCPZLOYHUBNQOZHDVEK5CIC4P/action/timestamp_anchor","attest_storage":"https://pith.science/pith/OJCPZLOYHUBNQOZHDVEK5CIC4P/action/storage_attestation","attest_author":"https://pith.science/pith/OJCPZLOYHUBNQOZHDVEK5CIC4P/action/author_attestation","sign_citation":"https://pith.science/pith/OJCPZLOYHUBNQOZHDVEK5CIC4P/action/citation_signature","submit_replication":"https://pith.science/pith/OJCPZLOYHUBNQOZHDVEK5CIC4P/action/replication_record"}},"created_at":"2026-05-17T23:43:23.517368+00:00","updated_at":"2026-05-17T23:43:23.517368+00:00"}