{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:XCQKHBHIODD37AJBSONYEXM4HC","short_pith_number":"pith:XCQKHBHI","canonical_record":{"source":{"id":"1701.00606","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-01-03T09:04:37Z","cross_cats_sorted":[],"title_canon_sha256":"134ff5d8f87bba0051aa26e3a8f3f4340c1fe0b584b6704e07c0163c1c516172","abstract_canon_sha256":"460b92dfcb2310c3cd8b5fa972bca95e3c5afc48be3da0ae27961d48a465ee9a"},"schema_version":"1.0"},"canonical_sha256":"b8a0a384e870c7bf8121939b825d9c38af05b3929500d4336a9fdb7ece8cc19f","source":{"kind":"arxiv","id":"1701.00606","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.00606","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"arxiv_version","alias_value":"1701.00606v2","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.00606","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"pith_short_12","alias_value":"XCQKHBHIODD3","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"XCQKHBHIODD37AJB","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"XCQKHBHI","created_at":"2026-05-18T12:31:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:XCQKHBHIODD37AJBSONYEXM4HC","target":"record","payload":{"canonical_record":{"source":{"id":"1701.00606","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-01-03T09:04:37Z","cross_cats_sorted":[],"title_canon_sha256":"134ff5d8f87bba0051aa26e3a8f3f4340c1fe0b584b6704e07c0163c1c516172","abstract_canon_sha256":"460b92dfcb2310c3cd8b5fa972bca95e3c5afc48be3da0ae27961d48a465ee9a"},"schema_version":"1.0"},"canonical_sha256":"b8a0a384e870c7bf8121939b825d9c38af05b3929500d4336a9fdb7ece8cc19f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:42:02.198717Z","signature_b64":"QIp7bKRsWGImtXc2+cH43/HuL70mIs7eZAgm4Lr9u785r63I/Q5vOgZ7XQbqSwK+yB11ZNDuYMuqAHAbUWj9CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b8a0a384e870c7bf8121939b825d9c38af05b3929500d4336a9fdb7ece8cc19f","last_reissued_at":"2026-05-18T00:42:02.198185Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:42:02.198185Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1701.00606","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:42:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hBfH+q1ru1JjeX3Z/mVLuskVDVqaW8NZRveD/WT4Vvc4PqJBs0EM5t523v2VO7B1XSr5qdQZ+bI/Zpj/KwAZCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T23:35:02.820484Z"},"content_sha256":"8722962f77c583841ebd6607b9bb238314ea567ef2bfc8554ff0f43e4c333b61","schema_version":"1.0","event_id":"sha256:8722962f77c583841ebd6607b9bb238314ea567ef2bfc8554ff0f43e4c333b61"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:XCQKHBHIODD37AJBSONYEXM4HC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Witnessing nonclassical correlations via a single-shot experiment on an ensemble of spins using NMR","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Amandeep Singh, Arvind, Kavita Dorai","submitted_at":"2017-01-03T09:04:37Z","abstract_excerpt":"A bipartite quantum system in a mixed state can exhibit nonclassical correlations, which can go beyond quantum entanglement. While quantum discord is the standard measure of quantifying such general quantum correlations, the nonclassicality can be determined by simpler means via the measurement of witness operators. We experimentally construct a positive map to witness nonclassicality of two qubits in an NMR system. The map can be decomposed so that a single run of an experiment on an ensemble of spins suffices to detect the nonclassicality in the state, if present. We let the state evolve in "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.00606","kind":"arxiv","version":2},"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":"2026-05-18T00:42:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qpEl0VjLrdqOVbG/WPd/O/YChY9RhAo15eU4UH2rYHkj7dvWcuuj0pMgfmz8dpyQbofzsFgawUgu6eAyzhv2DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T23:35:02.820825Z"},"content_sha256":"3f6c0ce04cd7674439c7fa5f088d4292069d4a461dd47b447de2b5c51a93c14e","schema_version":"1.0","event_id":"sha256:3f6c0ce04cd7674439c7fa5f088d4292069d4a461dd47b447de2b5c51a93c14e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XCQKHBHIODD37AJBSONYEXM4HC/bundle.json","state_url":"https://pith.science/pith/XCQKHBHIODD37AJBSONYEXM4HC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XCQKHBHIODD37AJBSONYEXM4HC/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":"2026-06-08T23:35:02Z","links":{"resolver":"https://pith.science/pith/XCQKHBHIODD37AJBSONYEXM4HC","bundle":"https://pith.science/pith/XCQKHBHIODD37AJBSONYEXM4HC/bundle.json","state":"https://pith.science/pith/XCQKHBHIODD37AJBSONYEXM4HC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XCQKHBHIODD37AJBSONYEXM4HC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:XCQKHBHIODD37AJBSONYEXM4HC","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":"460b92dfcb2310c3cd8b5fa972bca95e3c5afc48be3da0ae27961d48a465ee9a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-01-03T09:04:37Z","title_canon_sha256":"134ff5d8f87bba0051aa26e3a8f3f4340c1fe0b584b6704e07c0163c1c516172"},"schema_version":"1.0","source":{"id":"1701.00606","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.00606","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"arxiv_version","alias_value":"1701.00606v2","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.00606","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"pith_short_12","alias_value":"XCQKHBHIODD3","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"XCQKHBHIODD37AJB","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"XCQKHBHI","created_at":"2026-05-18T12:31:53Z"}],"graph_snapshots":[{"event_id":"sha256:3f6c0ce04cd7674439c7fa5f088d4292069d4a461dd47b447de2b5c51a93c14e","target":"graph","created_at":"2026-05-18T00:42:02Z","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":"A bipartite quantum system in a mixed state can exhibit nonclassical correlations, which can go beyond quantum entanglement. While quantum discord is the standard measure of quantifying such general quantum correlations, the nonclassicality can be determined by simpler means via the measurement of witness operators. We experimentally construct a positive map to witness nonclassicality of two qubits in an NMR system. The map can be decomposed so that a single run of an experiment on an ensemble of spins suffices to detect the nonclassicality in the state, if present. We let the state evolve in ","authors_text":"Amandeep Singh, Arvind, Kavita Dorai","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-01-03T09:04:37Z","title":"Witnessing nonclassical correlations via a single-shot experiment on an ensemble of spins using NMR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.00606","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":"sha256:8722962f77c583841ebd6607b9bb238314ea567ef2bfc8554ff0f43e4c333b61","target":"record","created_at":"2026-05-18T00:42:02Z","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":"460b92dfcb2310c3cd8b5fa972bca95e3c5afc48be3da0ae27961d48a465ee9a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-01-03T09:04:37Z","title_canon_sha256":"134ff5d8f87bba0051aa26e3a8f3f4340c1fe0b584b6704e07c0163c1c516172"},"schema_version":"1.0","source":{"id":"1701.00606","kind":"arxiv","version":2}},"canonical_sha256":"b8a0a384e870c7bf8121939b825d9c38af05b3929500d4336a9fdb7ece8cc19f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b8a0a384e870c7bf8121939b825d9c38af05b3929500d4336a9fdb7ece8cc19f","first_computed_at":"2026-05-18T00:42:02.198185Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:42:02.198185Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QIp7bKRsWGImtXc2+cH43/HuL70mIs7eZAgm4Lr9u785r63I/Q5vOgZ7XQbqSwK+yB11ZNDuYMuqAHAbUWj9CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:42:02.198717Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.00606","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8722962f77c583841ebd6607b9bb238314ea567ef2bfc8554ff0f43e4c333b61","sha256:3f6c0ce04cd7674439c7fa5f088d4292069d4a461dd47b447de2b5c51a93c14e"],"state_sha256":"99366fb05afc5c90b6e13d6a33185b7ffcca6952d79a81117058beed2a989fe0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fTpI4sGTlR74b/1hwLcecSYjrHgV9wtFwMATXeQxSCFxi+IhbeCq7vExlYMmrugkoZP4qZJaIy4jqCqjrI2LAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T23:35:02.822718Z","bundle_sha256":"d33989b62c69f17db658b63c19fbebf419caef01231d54b9bc93fc4f0170f7f9"}}