{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:YOGVMLU7P4WCZI727PYXWQI7CP","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":"d1284b1f08ca501b8d9fc14d8b914b9f12ea366979cbf2e815a45f548de79947","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-01-12T16:42:25Z","title_canon_sha256":"83eab43569bcf3377e73eca05c87081b6ce79f6f73891f234ff1bdb47a439e80"},"schema_version":"1.0","source":{"id":"1701.03399","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.03399","created_at":"2026-05-18T00:45:14Z"},{"alias_kind":"arxiv_version","alias_value":"1701.03399v1","created_at":"2026-05-18T00:45:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.03399","created_at":"2026-05-18T00:45:14Z"},{"alias_kind":"pith_short_12","alias_value":"YOGVMLU7P4WC","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"YOGVMLU7P4WCZI72","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"YOGVMLU7","created_at":"2026-05-18T12:31:56Z"}],"graph_snapshots":[{"event_id":"sha256:fd3b8c09c00d9ecc347db791a0e1052c9dff11b4840d738c29989adeb7259f7e","target":"graph","created_at":"2026-05-18T00:45:14Z","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":"We analyze entanglement and nonlocal properties of the convex set of symmetric $N$-qubits states which are diagonal in the Dicke basis. First, we demonstrate that within this set, positivity of partial transposition (PPT) is necessary and sufficient for separability --- which has also been reported recently in https://doi.org/10.1103/PhysRevA.94.060101 {Phys. Rev. A \\textbf{94}, 060101(R) (2016)}. Further, we show which states among the entangled DS are nonlocal under two-body Bell inequalities. The diagonal symmetric convex set contains a simple and extended family of states that violate the ","authors_text":"Anna Sanpera, Ruben Quesada, Swapan Rana","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-01-12T16:42:25Z","title":"Entanglement and Nonlocality in Diagonal Symmetric States of $N$-qubits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.03399","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":"sha256:1cf861b7e2ac5e3e1c113aba9c4fb0571001b02b891ae9c9ece7ada8f738be9e","target":"record","created_at":"2026-05-18T00:45:14Z","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":"d1284b1f08ca501b8d9fc14d8b914b9f12ea366979cbf2e815a45f548de79947","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-01-12T16:42:25Z","title_canon_sha256":"83eab43569bcf3377e73eca05c87081b6ce79f6f73891f234ff1bdb47a439e80"},"schema_version":"1.0","source":{"id":"1701.03399","kind":"arxiv","version":1}},"canonical_sha256":"c38d562e9f7f2c2ca3fafbf17b411f13f54df5e955b54e2e8cc7c9ee6ef1c9b2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c38d562e9f7f2c2ca3fafbf17b411f13f54df5e955b54e2e8cc7c9ee6ef1c9b2","first_computed_at":"2026-05-18T00:45:14.301804Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:45:14.301804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bm3i8kPTN8ZCBXVDEpG5/FO5sjCTLMAhCCwCLSWh5Y9hUrJVk45pw8dyivh8OF0uSxxD6lLzgR94rvEk9F+aAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:45:14.302280Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.03399","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1cf861b7e2ac5e3e1c113aba9c4fb0571001b02b891ae9c9ece7ada8f738be9e","sha256:fd3b8c09c00d9ecc347db791a0e1052c9dff11b4840d738c29989adeb7259f7e"],"state_sha256":"6c78fbd67cb63b7eb4e448bb4845ae7ae8cf62c214dabc1a1d8f5a46f4f64ab1"}