{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:QZRWIFEO4BSHVE2GDODDGMSEWV","short_pith_number":"pith:QZRWIFEO","canonical_record":{"source":{"id":"quant-ph/0605250","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2006-05-31T02:41:11Z","cross_cats_sorted":[],"title_canon_sha256":"fc1841055966c1d8c6a2073ef94cd39c61b36db8ab7a91af6f2be93e7d4882eb","abstract_canon_sha256":"43f4d0b845c0ecf4be74b3a4a9f3349001c6d093ef3429e4d426dba963720b48"},"schema_version":"1.0"},"canonical_sha256":"866364148ee0647a93461b86333244b57d8aa1f091b560abffb8f98277e65bc3","source":{"kind":"arxiv","id":"quant-ph/0605250","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0605250","created_at":"2026-05-18T01:37:56Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0605250v3","created_at":"2026-05-18T01:37:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0605250","created_at":"2026-05-18T01:37:56Z"},{"alias_kind":"pith_short_12","alias_value":"QZRWIFEO4BSH","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"QZRWIFEO4BSHVE2G","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"QZRWIFEO","created_at":"2026-05-18T12:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:QZRWIFEO4BSHVE2GDODDGMSEWV","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/0605250","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2006-05-31T02:41:11Z","cross_cats_sorted":[],"title_canon_sha256":"fc1841055966c1d8c6a2073ef94cd39c61b36db8ab7a91af6f2be93e7d4882eb","abstract_canon_sha256":"43f4d0b845c0ecf4be74b3a4a9f3349001c6d093ef3429e4d426dba963720b48"},"schema_version":"1.0"},"canonical_sha256":"866364148ee0647a93461b86333244b57d8aa1f091b560abffb8f98277e65bc3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:56.544143Z","signature_b64":"Fbh2zPfyUoUsqUfvUI12/95UZRN2qdCqGsKAq4Wsr86Xi5mtUn8XBfJebLUsPWLzbjyIvVbcr7Uf8+wrMG/sCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"866364148ee0647a93461b86333244b57d8aa1f091b560abffb8f98277e65bc3","last_reissued_at":"2026-05-18T01:37:56.543466Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:56.543466Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/0605250","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":"2026-05-18T01:37:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/HY5Qhg664M7zOwZEJ/yV93hESd9yJBMUEwWrFJqMX9ehIii3bMQ8RCBy5BC/K9wlt/aqdelxIJLbARN7kYHDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T00:01:08.170028Z"},"content_sha256":"21d792ac508983f1bd1ccddf2bf7da16d2ef28605dd36e3bde8ca6fe41c3e771","schema_version":"1.0","event_id":"sha256:21d792ac508983f1bd1ccddf2bf7da16d2ef28605dd36e3bde8ca6fe41c3e771"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:QZRWIFEO4BSHVE2GDODDGMSEWV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An observable entanglement measure for unknown mixed quantum states","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Andreas Buchleitner, Florian Mintert","submitted_at":"2006-05-31T02:41:11Z","abstract_excerpt":"We show how an unknown mixed quantum state's entanglement can be quantified by a suitable, local parity measurement on its two-fold copy."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0605250","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":"2026-05-18T01:37:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XQ88GR9jEmIo3XGRV+RyiSrOACF47VlnGya1IpevyoOMJqmhtqBAu558oP1Bo76npmu7ySgj4p22UqqB6pGDBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T00:01:08.170386Z"},"content_sha256":"722cfc9d55fb4dd763be9725a74812bf35f297cee469aac1cec99e9ca347efd0","schema_version":"1.0","event_id":"sha256:722cfc9d55fb4dd763be9725a74812bf35f297cee469aac1cec99e9ca347efd0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QZRWIFEO4BSHVE2GDODDGMSEWV/bundle.json","state_url":"https://pith.science/pith/QZRWIFEO4BSHVE2GDODDGMSEWV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QZRWIFEO4BSHVE2GDODDGMSEWV/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":"2026-05-28T00:01:08Z","links":{"resolver":"https://pith.science/pith/QZRWIFEO4BSHVE2GDODDGMSEWV","bundle":"https://pith.science/pith/QZRWIFEO4BSHVE2GDODDGMSEWV/bundle.json","state":"https://pith.science/pith/QZRWIFEO4BSHVE2GDODDGMSEWV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QZRWIFEO4BSHVE2GDODDGMSEWV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:QZRWIFEO4BSHVE2GDODDGMSEWV","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":"43f4d0b845c0ecf4be74b3a4a9f3349001c6d093ef3429e4d426dba963720b48","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2006-05-31T02:41:11Z","title_canon_sha256":"fc1841055966c1d8c6a2073ef94cd39c61b36db8ab7a91af6f2be93e7d4882eb"},"schema_version":"1.0","source":{"id":"quant-ph/0605250","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0605250","created_at":"2026-05-18T01:37:56Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0605250v3","created_at":"2026-05-18T01:37:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0605250","created_at":"2026-05-18T01:37:56Z"},{"alias_kind":"pith_short_12","alias_value":"QZRWIFEO4BSH","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"QZRWIFEO4BSHVE2G","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"QZRWIFEO","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:722cfc9d55fb4dd763be9725a74812bf35f297cee469aac1cec99e9ca347efd0","target":"graph","created_at":"2026-05-18T01:37:56Z","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":"We show how an unknown mixed quantum state's entanglement can be quantified by a suitable, local parity measurement on its two-fold copy.","authors_text":"Andreas Buchleitner, Florian Mintert","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"2006-05-31T02:41:11Z","title":"An observable entanglement measure for unknown mixed quantum states"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0605250","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":"sha256:21d792ac508983f1bd1ccddf2bf7da16d2ef28605dd36e3bde8ca6fe41c3e771","target":"record","created_at":"2026-05-18T01:37:56Z","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":"43f4d0b845c0ecf4be74b3a4a9f3349001c6d093ef3429e4d426dba963720b48","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2006-05-31T02:41:11Z","title_canon_sha256":"fc1841055966c1d8c6a2073ef94cd39c61b36db8ab7a91af6f2be93e7d4882eb"},"schema_version":"1.0","source":{"id":"quant-ph/0605250","kind":"arxiv","version":3}},"canonical_sha256":"866364148ee0647a93461b86333244b57d8aa1f091b560abffb8f98277e65bc3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"866364148ee0647a93461b86333244b57d8aa1f091b560abffb8f98277e65bc3","first_computed_at":"2026-05-18T01:37:56.543466Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:56.543466Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Fbh2zPfyUoUsqUfvUI12/95UZRN2qdCqGsKAq4Wsr86Xi5mtUn8XBfJebLUsPWLzbjyIvVbcr7Uf8+wrMG/sCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:56.544143Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/0605250","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:21d792ac508983f1bd1ccddf2bf7da16d2ef28605dd36e3bde8ca6fe41c3e771","sha256:722cfc9d55fb4dd763be9725a74812bf35f297cee469aac1cec99e9ca347efd0"],"state_sha256":"b9110cafe0203039b3a6ea2fb139b3e7c27b811cffcd7b60cd00e52c55559e2f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rzW86k3WvzbTy5qTsuYlrGayrF55bqHvvGQuEU3HEc1fN+vct77ksRTzzA29ntXe5/HIV//RHWwNa5zd5qd9Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T00:01:08.172369Z","bundle_sha256":"73b22e13ae74c464c445c8e6bf602674a2001d2c5d4911156ac2ce2823e26703"}}