{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:63UGOVMFZ7DYLII5NPAYUPR42I","short_pith_number":"pith:63UGOVMF","schema_version":"1.0","canonical_sha256":"f6e8675585cfc785a11d6bc18a3e3cd23e83f7ec024fa2c13cfa16716c79febd","source":{"kind":"arxiv","id":"1407.5507","version":3},"attestation_state":"computed","paper":{"title":"Nonzero Classical Discord","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Barry C. Sanders, Marcos C. de Oliveira, Vlad Gheorghiu","submitted_at":"2014-07-21T14:22:43Z","abstract_excerpt":"Quantum discord is the quantitative difference between two alternative expressions for bipartite mutual information, given respectively in terms of two distinct definitions for the conditional entropy. By constructing a stochastic model of shared states, classical discord can be similarly defined, quantifying the presence of some stochasticity in the measurement process. Therefore, discord can generally be understood as a quantification of the system's state disturbance due to local measurements, be it quantum or classical. We establish an operational meaning of classical discord in the contex"},"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":"1407.5507","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-21T14:22:43Z","cross_cats_sorted":[],"title_canon_sha256":"aca4ae6556eb35c9557f58806a05b8c3cb4dde7e71348bb70f9d202e42e55e7c","abstract_canon_sha256":"3beceb7fa503ab018c8ff23b4c859ee612841c10bb96ed88ac6ad58b6db52944"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:36:35.968782Z","signature_b64":"PlIAXWyWcKYMHn9TwwsZSlfzIMQ406XYSbQXvB0vknNzvCVPgHi9X3SOcimektVAbZzehSOLY7HcD3qzq9UUBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6e8675585cfc785a11d6bc18a3e3cd23e83f7ec024fa2c13cfa16716c79febd","last_reissued_at":"2026-05-18T01:36:35.968356Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:36:35.968356Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Nonzero Classical Discord","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Barry C. Sanders, Marcos C. de Oliveira, Vlad Gheorghiu","submitted_at":"2014-07-21T14:22:43Z","abstract_excerpt":"Quantum discord is the quantitative difference between two alternative expressions for bipartite mutual information, given respectively in terms of two distinct definitions for the conditional entropy. By constructing a stochastic model of shared states, classical discord can be similarly defined, quantifying the presence of some stochasticity in the measurement process. Therefore, discord can generally be understood as a quantification of the system's state disturbance due to local measurements, be it quantum or classical. We establish an operational meaning of classical discord in the contex"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.5507","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":"1407.5507","created_at":"2026-05-18T01:36:35.968423+00:00"},{"alias_kind":"arxiv_version","alias_value":"1407.5507v3","created_at":"2026-05-18T01:36:35.968423+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.5507","created_at":"2026-05-18T01:36:35.968423+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/63UGOVMFZ7DYLII5NPAYUPR42I","json":"https://pith.science/pith/63UGOVMFZ7DYLII5NPAYUPR42I.json","graph_json":"https://pith.science/api/pith-number/63UGOVMFZ7DYLII5NPAYUPR42I/graph.json","events_json":"https://pith.science/api/pith-number/63UGOVMFZ7DYLII5NPAYUPR42I/events.json","paper":"https://pith.science/paper/63UGOVMF"},"agent_actions":{"view_html":"https://pith.science/pith/63UGOVMFZ7DYLII5NPAYUPR42I","download_json":"https://pith.science/pith/63UGOVMFZ7DYLII5NPAYUPR42I.json","view_paper":"https://pith.science/paper/63UGOVMF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1407.5507&json=true","fetch_graph":"https://pith.science/api/pith-number/63UGOVMFZ7DYLII5NPAYUPR42I/graph.json","fetch_events":"https://pith.science/api/pith-number/63UGOVMFZ7DYLII5NPAYUPR42I/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/63UGOVMFZ7DYLII5NPAYUPR42I/action/timestamp_anchor","attest_storage":"https://pith.science/pith/63UGOVMFZ7DYLII5NPAYUPR42I/action/storage_attestation","attest_author":"https://pith.science/pith/63UGOVMFZ7DYLII5NPAYUPR42I/action/author_attestation","sign_citation":"https://pith.science/pith/63UGOVMFZ7DYLII5NPAYUPR42I/action/citation_signature","submit_replication":"https://pith.science/pith/63UGOVMFZ7DYLII5NPAYUPR42I/action/replication_record"}},"created_at":"2026-05-18T01:36:35.968423+00:00","updated_at":"2026-05-18T01:36:35.968423+00:00"}