{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:A47XYI6YJRUDHRSO365FH5TLQE","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":"0cfedc4f845160b7a2ef6311b69b0352b6004504d1a301243fb41c9e88752bc3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-02-27T16:01:53Z","title_canon_sha256":"51b098e30b72901cb7749340385612d9114e0dfa1986f54d05ee2effe06ab737"},"schema_version":"1.0","source":{"id":"2002.12216","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.12216","created_at":"2026-07-05T04:01:54Z"},{"alias_kind":"arxiv_version","alias_value":"2002.12216v3","created_at":"2026-07-05T04:01:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.12216","created_at":"2026-07-05T04:01:54Z"},{"alias_kind":"pith_short_12","alias_value":"A47XYI6YJRUD","created_at":"2026-07-05T04:01:54Z"},{"alias_kind":"pith_short_16","alias_value":"A47XYI6YJRUDHRSO","created_at":"2026-07-05T04:01:54Z"},{"alias_kind":"pith_short_8","alias_value":"A47XYI6Y","created_at":"2026-07-05T04:01:54Z"}],"graph_snapshots":[{"event_id":"sha256:4b9e5344f406fabc0f5598fab4a56a4170392a8f3d10cf0d460c84f270f57d74","target":"graph","created_at":"2026-07-05T04:01:54Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2002.12216/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Violation of a noncontextuality inequality or the phenomenon referred to `quantum contextuality' is a fundamental feature of quantum theory. In this article, we derive a novel family of noncontextuality inequalities along with their sum-of-squares decompositions in the simplest (odd-cycle) sequential-measurement scenario capable to demonstrate Kochen-Specker contextuality. The sum-of-squares decompositions allow us to obtain the maximal quantum violation of these inequalities and a set of algebraic relations necessarily satisfied by any state and measurements achieving it. With their help, we ","authors_text":"Debashis Saha, Rafael Santos, Remigiusz Augusiak","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-02-27T16:01:53Z","title":"Sum-of-squares decompositions for a family of noncontextuality inequalities and self-testing of quantum devices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.12216","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":"sha256:978b7cc519193be141bd3d860b17c25a6455cb9dfbd5b41edbdedcdc0e195790","target":"record","created_at":"2026-07-05T04:01:54Z","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":"0cfedc4f845160b7a2ef6311b69b0352b6004504d1a301243fb41c9e88752bc3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-02-27T16:01:53Z","title_canon_sha256":"51b098e30b72901cb7749340385612d9114e0dfa1986f54d05ee2effe06ab737"},"schema_version":"1.0","source":{"id":"2002.12216","kind":"arxiv","version":3}},"canonical_sha256":"073f7c23d84c6833c64edfba53f66b81026692589612234c99d37cfda17b43a2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"073f7c23d84c6833c64edfba53f66b81026692589612234c99d37cfda17b43a2","first_computed_at":"2026-07-05T04:01:54.337947Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:01:54.337947Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6+lZI9bGL4PFdVCwzry+4mNeT8J004irWnZd3nbn+PQ8OFLp6l5em5WOypZk5yiKrnMi0qrmw+EG5cM0kNa5Dw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:01:54.338356Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.12216","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:978b7cc519193be141bd3d860b17c25a6455cb9dfbd5b41edbdedcdc0e195790","sha256:4b9e5344f406fabc0f5598fab4a56a4170392a8f3d10cf0d460c84f270f57d74"],"state_sha256":"b49853a506f5da097eca4338140a3b15c8015b2fae5435bb3568c4b92588290d"}