{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:MFU2PNJQQPLSGQMZ47TFVZE6SQ","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":"40c376bd068e9b2662c2b9ef3655d68a7347e0d436e1a37f760ce9a93d77d6bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-11-20T14:48:49Z","title_canon_sha256":"ddbb1783eba96549aee4dc0174d26d292ae365039150302481aa6f3eb063ec07"},"schema_version":"1.0","source":{"id":"1511.06621","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.06621","created_at":"2026-05-18T01:18:25Z"},{"alias_kind":"arxiv_version","alias_value":"1511.06621v2","created_at":"2026-05-18T01:18:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.06621","created_at":"2026-05-18T01:18:25Z"},{"alias_kind":"pith_short_12","alias_value":"MFU2PNJQQPLS","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MFU2PNJQQPLSGQMZ","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MFU2PNJQ","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:9c56578dab8f6b6be7a36f8a8a280418e41d1c77bb9fec6873e854ab1e908b2d","target":"graph","created_at":"2026-05-18T01:18:25Z","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":"Currently available separability criteria for continuous-variable states are generally based on the covariance matrix of quadrature operators. The well-known separability criterion of Duan et al. [Phys. Rev. Lett. 84, 2722 (2000)] and Simon [Phys. Rev. Lett. 84, 2726 (2000)] , for example, gives a necessary and sufficient condition for a two-mode Gaussian state to be separable, but leaves many entangled non-Gaussian states undetected. Here, we introduce an improvement of this criterion that enables a stronger entanglement detection. The improved condition is based on the knowledge of an additi","authors_text":"Aikaterini Mandilara, Anaelle Hertz, Evgueni Karpov, Nicolas J. Cerf","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-11-20T14:48:49Z","title":"Detection of non-Gaussian entangled states with an improved continuous-variable separability criterion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.06621","kind":"arxiv","version":2},"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:bc9d29dc2922331aad6f337ed9a7d8158c45ddef64ac3acf9e9ef837c22c0986","target":"record","created_at":"2026-05-18T01:18:25Z","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":"40c376bd068e9b2662c2b9ef3655d68a7347e0d436e1a37f760ce9a93d77d6bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-11-20T14:48:49Z","title_canon_sha256":"ddbb1783eba96549aee4dc0174d26d292ae365039150302481aa6f3eb063ec07"},"schema_version":"1.0","source":{"id":"1511.06621","kind":"arxiv","version":2}},"canonical_sha256":"6169a7b53083d7234199e7e65ae49e9407425e550e5fa812d7d341c07d7f53f4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6169a7b53083d7234199e7e65ae49e9407425e550e5fa812d7d341c07d7f53f4","first_computed_at":"2026-05-18T01:18:25.131134Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:25.131134Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gWSgwhXq0EGyrnOjSwOuX8hDPUsjtNYbI5sbLeux1hAl4DQpgJvGNxvRjISjVO4QfcHTBuHC2LrqE0f5qxTSCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:25.131694Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.06621","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bc9d29dc2922331aad6f337ed9a7d8158c45ddef64ac3acf9e9ef837c22c0986","sha256:9c56578dab8f6b6be7a36f8a8a280418e41d1c77bb9fec6873e854ab1e908b2d"],"state_sha256":"02511c59e513d65ba04a31e6f6a0409f486c785f6667a45680713108af864a51"}