{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:OY3Z46Q4STNDGWELRBEJVXAQXP","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":"081deced68a11c6cdb41a84a1fe11ade6c5d94766c6f0cb3696237e89552f2c5","cross_cats_sorted":["math-ph","math.MP","math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-04-30T07:28:09Z","title_canon_sha256":"bd0a7bc46a6f81c26537807bf9a0eb1294ed1c72a09c4c866327ad0ed10a9522"},"schema_version":"1.0","source":{"id":"2404.19308","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.19308","created_at":"2026-07-05T08:13:41Z"},{"alias_kind":"arxiv_version","alias_value":"2404.19308v1","created_at":"2026-07-05T08:13:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.19308","created_at":"2026-07-05T08:13:41Z"},{"alias_kind":"pith_short_12","alias_value":"OY3Z46Q4STND","created_at":"2026-07-05T08:13:41Z"},{"alias_kind":"pith_short_16","alias_value":"OY3Z46Q4STNDGWEL","created_at":"2026-07-05T08:13:41Z"},{"alias_kind":"pith_short_8","alias_value":"OY3Z46Q4","created_at":"2026-07-05T08:13:41Z"}],"graph_snapshots":[{"event_id":"sha256:9254935f48c9d932c4e14b8ca5cd4d0ebdcdcada4a68d76d5927c922f351eb54","target":"graph","created_at":"2026-07-05T08:13:41Z","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/2404.19308/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Although quantum entanglement is an important resource, its characterization is quite challenging. The partial transposition is a common method to detect bipartite entanglement. In this paper, the authors study the partial-transpose(PT)-moments of two-qubit states,and completely describe the whole region, composed of the second and third PT-moments, for all two-qubit states. Furthermore, they determine the accurate region corresponding to all entangled two-qubit states. The states corresponding to those boundary points of the whole region, and to the border lines between separable and entangle","authors_text":"Hua Xiang, Lin Chen, Lin Zhang, Ming-Jing Zhao, Yi Shen","cross_cats":["math-ph","math.MP","math.OC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-04-30T07:28:09Z","title":"A characterization of entangled two-qubit states via partial-transpose-moments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.19308","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":"sha256:4c5ac5cb1036fd83c509f5ebeba4fee1830272fb7e1849c2784f144405ab40a7","target":"record","created_at":"2026-07-05T08:13:41Z","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":"081deced68a11c6cdb41a84a1fe11ade6c5d94766c6f0cb3696237e89552f2c5","cross_cats_sorted":["math-ph","math.MP","math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-04-30T07:28:09Z","title_canon_sha256":"bd0a7bc46a6f81c26537807bf9a0eb1294ed1c72a09c4c866327ad0ed10a9522"},"schema_version":"1.0","source":{"id":"2404.19308","kind":"arxiv","version":1}},"canonical_sha256":"76379e7a1c94da33588b88489adc10bbed7af07799c209666ce865bbb2da30a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"76379e7a1c94da33588b88489adc10bbed7af07799c209666ce865bbb2da30a6","first_computed_at":"2026-07-05T08:13:41.223994Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:13:41.223994Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b5PXMl1gaeJok1ex0zdAWpAbtRUL9xhhsFTkVYgUQ79HXZHnatZQHx6MYY6LYikv3ZPQduELWv1aXvlZHydVDg==","signature_status":"signed_v1","signed_at":"2026-07-05T08:13:41.224457Z","signed_message":"canonical_sha256_bytes"},"source_id":"2404.19308","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4c5ac5cb1036fd83c509f5ebeba4fee1830272fb7e1849c2784f144405ab40a7","sha256:9254935f48c9d932c4e14b8ca5cd4d0ebdcdcada4a68d76d5927c922f351eb54"],"state_sha256":"c8858c2541b34e13361dc319365e5da0c251f4ccf246020b208c89baf4043d07"}