{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:YOGVMLU7P4WCZI727PYXWQI7CP","short_pith_number":"pith:YOGVMLU7","schema_version":"1.0","canonical_sha256":"c38d562e9f7f2c2ca3fafbf17b411f13f54df5e955b54e2e8cc7c9ee6ef1c9b2","source":{"kind":"arxiv","id":"1701.03399","version":1},"attestation_state":"computed","paper":{"title":"Entanglement and Nonlocality in Diagonal Symmetric States of $N$-qubits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Anna Sanpera, Ruben Quesada, Swapan Rana","submitted_at":"2017-01-12T16:42:25Z","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 "},"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":"1701.03399","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-01-12T16:42:25Z","cross_cats_sorted":[],"title_canon_sha256":"83eab43569bcf3377e73eca05c87081b6ce79f6f73891f234ff1bdb47a439e80","abstract_canon_sha256":"d1284b1f08ca501b8d9fc14d8b914b9f12ea366979cbf2e815a45f548de79947"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:45:14.302280Z","signature_b64":"bm3i8kPTN8ZCBXVDEpG5/FO5sjCTLMAhCCwCLSWh5Y9hUrJVk45pw8dyivh8OF0uSxxD6lLzgR94rvEk9F+aAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c38d562e9f7f2c2ca3fafbf17b411f13f54df5e955b54e2e8cc7c9ee6ef1c9b2","last_reissued_at":"2026-05-18T00:45:14.301804Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:45:14.301804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Entanglement and Nonlocality in Diagonal Symmetric States of $N$-qubits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Anna Sanpera, Ruben Quesada, Swapan Rana","submitted_at":"2017-01-12T16:42:25Z","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 "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.03399","kind":"arxiv","version":1},"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":"1701.03399","created_at":"2026-05-18T00:45:14.301870+00:00"},{"alias_kind":"arxiv_version","alias_value":"1701.03399v1","created_at":"2026-05-18T00:45:14.301870+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.03399","created_at":"2026-05-18T00:45:14.301870+00:00"},{"alias_kind":"pith_short_12","alias_value":"YOGVMLU7P4WC","created_at":"2026-05-18T12:31:56.362134+00:00"},{"alias_kind":"pith_short_16","alias_value":"YOGVMLU7P4WCZI72","created_at":"2026-05-18T12:31:56.362134+00:00"},{"alias_kind":"pith_short_8","alias_value":"YOGVMLU7","created_at":"2026-05-18T12:31:56.362134+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/YOGVMLU7P4WCZI727PYXWQI7CP","json":"https://pith.science/pith/YOGVMLU7P4WCZI727PYXWQI7CP.json","graph_json":"https://pith.science/api/pith-number/YOGVMLU7P4WCZI727PYXWQI7CP/graph.json","events_json":"https://pith.science/api/pith-number/YOGVMLU7P4WCZI727PYXWQI7CP/events.json","paper":"https://pith.science/paper/YOGVMLU7"},"agent_actions":{"view_html":"https://pith.science/pith/YOGVMLU7P4WCZI727PYXWQI7CP","download_json":"https://pith.science/pith/YOGVMLU7P4WCZI727PYXWQI7CP.json","view_paper":"https://pith.science/paper/YOGVMLU7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1701.03399&json=true","fetch_graph":"https://pith.science/api/pith-number/YOGVMLU7P4WCZI727PYXWQI7CP/graph.json","fetch_events":"https://pith.science/api/pith-number/YOGVMLU7P4WCZI727PYXWQI7CP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YOGVMLU7P4WCZI727PYXWQI7CP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YOGVMLU7P4WCZI727PYXWQI7CP/action/storage_attestation","attest_author":"https://pith.science/pith/YOGVMLU7P4WCZI727PYXWQI7CP/action/author_attestation","sign_citation":"https://pith.science/pith/YOGVMLU7P4WCZI727PYXWQI7CP/action/citation_signature","submit_replication":"https://pith.science/pith/YOGVMLU7P4WCZI727PYXWQI7CP/action/replication_record"}},"created_at":"2026-05-18T00:45:14.301870+00:00","updated_at":"2026-05-18T00:45:14.301870+00:00"}