{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:JG4AKDJRSF6RFXAUYP6EIXBW6J","short_pith_number":"pith:JG4AKDJR","canonical_record":{"source":{"id":"1510.08030","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-27T19:03:14Z","cross_cats_sorted":[],"title_canon_sha256":"796a9a0ecd0fe91a02e2341f909caea19121faff6f643097931c0824a0804206","abstract_canon_sha256":"84a38239e7e34283924e38790e50507b451fada5f7525cba848ea7ce1603aad4"},"schema_version":"1.0"},"canonical_sha256":"49b8050d31917d12dc14c3fc445c36f26ee2529fd9e42de18a8f2839532a0728","source":{"kind":"arxiv","id":"1510.08030","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.08030","created_at":"2026-05-18T01:19:29Z"},{"alias_kind":"arxiv_version","alias_value":"1510.08030v3","created_at":"2026-05-18T01:19:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.08030","created_at":"2026-05-18T01:19:29Z"},{"alias_kind":"pith_short_12","alias_value":"JG4AKDJRSF6R","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JG4AKDJRSF6RFXAU","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JG4AKDJR","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:JG4AKDJRSF6RFXAUYP6EIXBW6J","target":"record","payload":{"canonical_record":{"source":{"id":"1510.08030","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-27T19:03:14Z","cross_cats_sorted":[],"title_canon_sha256":"796a9a0ecd0fe91a02e2341f909caea19121faff6f643097931c0824a0804206","abstract_canon_sha256":"84a38239e7e34283924e38790e50507b451fada5f7525cba848ea7ce1603aad4"},"schema_version":"1.0"},"canonical_sha256":"49b8050d31917d12dc14c3fc445c36f26ee2529fd9e42de18a8f2839532a0728","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:29.069737Z","signature_b64":"VmxDaHZ7PVpbt+4bZWfvjUjoxjyvyXvXlq0DOO8HRKg9Cyyk/ubQxq80YffZ3NXAa+4xi6XnWianw7mpwAAhAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"49b8050d31917d12dc14c3fc445c36f26ee2529fd9e42de18a8f2839532a0728","last_reissued_at":"2026-05-18T01:19:29.069157Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:29.069157Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.08030","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:19:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KLzC0kQxrt4/otpeTqfsK3+aM+gBi8bu8XxDxQpcrrYgPKJOFeZtKgdH3Wa4B7URppON+XcfLPhI3d/s/EZBCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:54:51.541773Z"},"content_sha256":"529f48ee1097905f23698c737e43eecf92615e7fc0941a7d66d7ede222dd304b","schema_version":"1.0","event_id":"sha256:529f48ee1097905f23698c737e43eecf92615e7fc0941a7d66d7ede222dd304b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:JG4AKDJRSF6RFXAUYP6EIXBW6J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantification of Einstein-Podolski-Rosen steering for two-qubit states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"A. C. S. Costa, R. M. Angelo","submitted_at":"2015-10-27T19:03:14Z","abstract_excerpt":"In the last few years, several criteria to identify Eistein-Podolski-Rosen steering have been proposed and experimentally implemented. On the operational side, however, the evaluation of the steerability degree of a given state has shown to be a difficult task and only a few results are known. In this work, we propose a measure of steering that is based on the maximal violation of well established steering inequalities. Applying this approach to two-qubit states, we managed to derive simple closed formulas for steering in the two- and three-measurement scenarios. Among the options investigated"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.08030","kind":"arxiv","version":3},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:19:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f0gIZ0jV436Zecwssysi2YyOwQ1yzj/i8WyEJe5kgF70aB5nUMQmHTuN/ktW7JUqPuntIqhB2qYDa5rJfQR2Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:54:51.542424Z"},"content_sha256":"05099b1df61fe9624ad0b7ed123705bccfc9a3ac0d4b9813e374e9ed295782d8","schema_version":"1.0","event_id":"sha256:05099b1df61fe9624ad0b7ed123705bccfc9a3ac0d4b9813e374e9ed295782d8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JG4AKDJRSF6RFXAUYP6EIXBW6J/bundle.json","state_url":"https://pith.science/pith/JG4AKDJRSF6RFXAUYP6EIXBW6J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JG4AKDJRSF6RFXAUYP6EIXBW6J/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-03T07:54:51Z","links":{"resolver":"https://pith.science/pith/JG4AKDJRSF6RFXAUYP6EIXBW6J","bundle":"https://pith.science/pith/JG4AKDJRSF6RFXAUYP6EIXBW6J/bundle.json","state":"https://pith.science/pith/JG4AKDJRSF6RFXAUYP6EIXBW6J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JG4AKDJRSF6RFXAUYP6EIXBW6J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:JG4AKDJRSF6RFXAUYP6EIXBW6J","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":"84a38239e7e34283924e38790e50507b451fada5f7525cba848ea7ce1603aad4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-27T19:03:14Z","title_canon_sha256":"796a9a0ecd0fe91a02e2341f909caea19121faff6f643097931c0824a0804206"},"schema_version":"1.0","source":{"id":"1510.08030","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.08030","created_at":"2026-05-18T01:19:29Z"},{"alias_kind":"arxiv_version","alias_value":"1510.08030v3","created_at":"2026-05-18T01:19:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.08030","created_at":"2026-05-18T01:19:29Z"},{"alias_kind":"pith_short_12","alias_value":"JG4AKDJRSF6R","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JG4AKDJRSF6RFXAU","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JG4AKDJR","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:05099b1df61fe9624ad0b7ed123705bccfc9a3ac0d4b9813e374e9ed295782d8","target":"graph","created_at":"2026-05-18T01:19:29Z","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":"In the last few years, several criteria to identify Eistein-Podolski-Rosen steering have been proposed and experimentally implemented. On the operational side, however, the evaluation of the steerability degree of a given state has shown to be a difficult task and only a few results are known. In this work, we propose a measure of steering that is based on the maximal violation of well established steering inequalities. Applying this approach to two-qubit states, we managed to derive simple closed formulas for steering in the two- and three-measurement scenarios. Among the options investigated","authors_text":"A. C. S. Costa, R. M. Angelo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-27T19:03:14Z","title":"Quantification of Einstein-Podolski-Rosen steering for two-qubit states"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.08030","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":"sha256:529f48ee1097905f23698c737e43eecf92615e7fc0941a7d66d7ede222dd304b","target":"record","created_at":"2026-05-18T01:19:29Z","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":"84a38239e7e34283924e38790e50507b451fada5f7525cba848ea7ce1603aad4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-27T19:03:14Z","title_canon_sha256":"796a9a0ecd0fe91a02e2341f909caea19121faff6f643097931c0824a0804206"},"schema_version":"1.0","source":{"id":"1510.08030","kind":"arxiv","version":3}},"canonical_sha256":"49b8050d31917d12dc14c3fc445c36f26ee2529fd9e42de18a8f2839532a0728","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"49b8050d31917d12dc14c3fc445c36f26ee2529fd9e42de18a8f2839532a0728","first_computed_at":"2026-05-18T01:19:29.069157Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:29.069157Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VmxDaHZ7PVpbt+4bZWfvjUjoxjyvyXvXlq0DOO8HRKg9Cyyk/ubQxq80YffZ3NXAa+4xi6XnWianw7mpwAAhAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:29.069737Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.08030","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:529f48ee1097905f23698c737e43eecf92615e7fc0941a7d66d7ede222dd304b","sha256:05099b1df61fe9624ad0b7ed123705bccfc9a3ac0d4b9813e374e9ed295782d8"],"state_sha256":"22618ff9edd5977494204a00937e91110495ee567b95fcf17b244c75cc0eb286"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lE+RGi3cHKyL7dlnuhz/Z3HZS3jZMXs0ZY6ACgUHCdahpheBDaNHYfOBj4/32+S9AQXvRLoQEdbbUCOFnjkwCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T07:54:51.545388Z","bundle_sha256":"ef8dd6d8b24bab73082bc22ff42639c53525780eab64e4d6feae9749ca000c51"}}