{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:Z4IJ7IV5INBGEERGCEZ6H6Q7YI","short_pith_number":"pith:Z4IJ7IV5","canonical_record":{"source":{"id":"quant-ph/0607167","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2006-07-25T16:56:40Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"0b2dd80fab1647235412545284be202bde5569ed6bbe65cc8d6e62d0f6f63674","abstract_canon_sha256":"d8629d1cc8c6a3ebb57e32e4bf60ef5dad2a4eb499625109d8dce5b8cb1e595a"},"schema_version":"1.0"},"canonical_sha256":"cf109fa2bd43426212261133e3fa1fc23893994da71cc5da3bb55b87cf266382","source":{"kind":"arxiv","id":"quant-ph/0607167","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0607167","created_at":"2026-05-18T03:14:50Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0607167v4","created_at":"2026-05-18T03:14:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0607167","created_at":"2026-05-18T03:14:50Z"},{"alias_kind":"pith_short_12","alias_value":"Z4IJ7IV5INBG","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"Z4IJ7IV5INBGEERG","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"Z4IJ7IV5","created_at":"2026-05-18T12:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:Z4IJ7IV5INBGEERGCEZ6H6Q7YI","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/0607167","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2006-07-25T16:56:40Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"0b2dd80fab1647235412545284be202bde5569ed6bbe65cc8d6e62d0f6f63674","abstract_canon_sha256":"d8629d1cc8c6a3ebb57e32e4bf60ef5dad2a4eb499625109d8dce5b8cb1e595a"},"schema_version":"1.0"},"canonical_sha256":"cf109fa2bd43426212261133e3fa1fc23893994da71cc5da3bb55b87cf266382","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:14:50.588643Z","signature_b64":"4FAv8YIaT95f74vdpBJUx2FojIs9hjbdD+nk34dRpyaB4cxhwuIHbmHjLUKFINifui3CgSpcWwqLcT7z6+I/CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cf109fa2bd43426212261133e3fa1fc23893994da71cc5da3bb55b87cf266382","last_reissued_at":"2026-05-18T03:14:50.587784Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:14:50.587784Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/0607167","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:14:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6Nz7sTPQwWxdjMvKcGvmorGclHgvm/Fm40o+8ZdvAQ+bvJBzVokv0ER0l2ZM7CEHuzYgTYv6wvIZrFccU1BECA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T09:57:43.205072Z"},"content_sha256":"426e297172489939b853f4d05d4ec854863a8d1656d558ba161821d7698b6217","schema_version":"1.0","event_id":"sha256:426e297172489939b853f4d05d4ec854863a8d1656d558ba161821d7698b6217"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:Z4IJ7IV5INBGEERGCEZ6H6Q7YI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantitative entanglement witnesses","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"quant-ph","authors_text":"Fernando G.S.L. Brandao, Jens Eisert, Koenraad M.R. Audenaert","submitted_at":"2006-07-25T16:56:40Z","abstract_excerpt":"Entanglement witnesses provide tools to detect entanglement in experimental situations without the need of having full tomographic knowledge about the state. If one estimates in an experiment an expectation value smaller than zero, one can directly infer that the state has been entangled, or specifically multi-partite entangled, in the first place. In this article, we emphasize that all these tests - based on the very same data - give rise to quantitative estimates in terms of entanglement measures: \"If a test is strongly violated, one can also infer that the state was quantitatively very much"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0607167","kind":"arxiv","version":4},"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":"2026-05-18T03:14:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2LBEQ5418EyXkOKntXWsgkTpQigbbcLqBGApwZ8mItzVV3+EzBql/EYdGQ/k5BkkYxt1QGIuDu/exnQvU/m/AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T09:57:43.205466Z"},"content_sha256":"0b55b22036fc48e0a1b2cae92d55b83d08e4274aa48c2049f9b347ec9632dc61","schema_version":"1.0","event_id":"sha256:0b55b22036fc48e0a1b2cae92d55b83d08e4274aa48c2049f9b347ec9632dc61"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z4IJ7IV5INBGEERGCEZ6H6Q7YI/bundle.json","state_url":"https://pith.science/pith/Z4IJ7IV5INBGEERGCEZ6H6Q7YI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z4IJ7IV5INBGEERGCEZ6H6Q7YI/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":"2026-05-24T09:57:43Z","links":{"resolver":"https://pith.science/pith/Z4IJ7IV5INBGEERGCEZ6H6Q7YI","bundle":"https://pith.science/pith/Z4IJ7IV5INBGEERGCEZ6H6Q7YI/bundle.json","state":"https://pith.science/pith/Z4IJ7IV5INBGEERGCEZ6H6Q7YI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z4IJ7IV5INBGEERGCEZ6H6Q7YI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:Z4IJ7IV5INBGEERGCEZ6H6Q7YI","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":"d8629d1cc8c6a3ebb57e32e4bf60ef5dad2a4eb499625109d8dce5b8cb1e595a","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2006-07-25T16:56:40Z","title_canon_sha256":"0b2dd80fab1647235412545284be202bde5569ed6bbe65cc8d6e62d0f6f63674"},"schema_version":"1.0","source":{"id":"quant-ph/0607167","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0607167","created_at":"2026-05-18T03:14:50Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0607167v4","created_at":"2026-05-18T03:14:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0607167","created_at":"2026-05-18T03:14:50Z"},{"alias_kind":"pith_short_12","alias_value":"Z4IJ7IV5INBG","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"Z4IJ7IV5INBGEERG","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"Z4IJ7IV5","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:0b55b22036fc48e0a1b2cae92d55b83d08e4274aa48c2049f9b347ec9632dc61","target":"graph","created_at":"2026-05-18T03:14:50Z","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":"Entanglement witnesses provide tools to detect entanglement in experimental situations without the need of having full tomographic knowledge about the state. If one estimates in an experiment an expectation value smaller than zero, one can directly infer that the state has been entangled, or specifically multi-partite entangled, in the first place. In this article, we emphasize that all these tests - based on the very same data - give rise to quantitative estimates in terms of entanglement measures: \"If a test is strongly violated, one can also infer that the state was quantitatively very much","authors_text":"Fernando G.S.L. Brandao, Jens Eisert, Koenraad M.R. Audenaert","cross_cats":["cond-mat.other"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2006-07-25T16:56:40Z","title":"Quantitative entanglement witnesses"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0607167","kind":"arxiv","version":4},"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":"sha256:426e297172489939b853f4d05d4ec854863a8d1656d558ba161821d7698b6217","target":"record","created_at":"2026-05-18T03:14:50Z","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":"d8629d1cc8c6a3ebb57e32e4bf60ef5dad2a4eb499625109d8dce5b8cb1e595a","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2006-07-25T16:56:40Z","title_canon_sha256":"0b2dd80fab1647235412545284be202bde5569ed6bbe65cc8d6e62d0f6f63674"},"schema_version":"1.0","source":{"id":"quant-ph/0607167","kind":"arxiv","version":4}},"canonical_sha256":"cf109fa2bd43426212261133e3fa1fc23893994da71cc5da3bb55b87cf266382","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf109fa2bd43426212261133e3fa1fc23893994da71cc5da3bb55b87cf266382","first_computed_at":"2026-05-18T03:14:50.587784Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:14:50.587784Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4FAv8YIaT95f74vdpBJUx2FojIs9hjbdD+nk34dRpyaB4cxhwuIHbmHjLUKFINifui3CgSpcWwqLcT7z6+I/CA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:14:50.588643Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/0607167","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:426e297172489939b853f4d05d4ec854863a8d1656d558ba161821d7698b6217","sha256:0b55b22036fc48e0a1b2cae92d55b83d08e4274aa48c2049f9b347ec9632dc61"],"state_sha256":"45685db7559c86f0fa639579ee9430a3474d13b89b34fdefe73f707c53f42b20"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DcFpHZMp5AylbSFx3KJBkj4wmmRdYptEKE+7oypkCv/HLb04fupNx5BNJWhGY7/mYGQJV84ay6H14ODAkYd+DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T09:57:43.207713Z","bundle_sha256":"59e148846eda5c20009f8c8ebfebe5fa8a05b0507151adb6c059da3ef6bd9cd4"}}