{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:MYW6O2RENO24XEHBXT2HDXM5SF","short_pith_number":"pith:MYW6O2RE","canonical_record":{"source":{"id":"1009.2956","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-09-15T15:41:00Z","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.str-el"],"title_canon_sha256":"8de8b7f01d427e55774ba8159568ffe5f5431fc6391726fb5c51bba7a3702366","abstract_canon_sha256":"54966b43546b8abe5a89487a3ddc18e2bf25dfb4014dd5d81d8bf7db83febb0e"},"schema_version":"1.0"},"canonical_sha256":"662de76a246bb5cb90e1bcf471dd9d917cb91c164b67965238c923b179b402ed","source":{"kind":"arxiv","id":"1009.2956","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.2956","created_at":"2026-05-18T03:23:37Z"},{"alias_kind":"arxiv_version","alias_value":"1009.2956v1","created_at":"2026-05-18T03:23:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.2956","created_at":"2026-05-18T03:23:37Z"},{"alias_kind":"pith_short_12","alias_value":"MYW6O2RENO24","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"MYW6O2RENO24XEHB","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"MYW6O2RE","created_at":"2026-05-18T12:26:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:MYW6O2RENO24XEHBXT2HDXM5SF","target":"record","payload":{"canonical_record":{"source":{"id":"1009.2956","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-09-15T15:41:00Z","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.str-el"],"title_canon_sha256":"8de8b7f01d427e55774ba8159568ffe5f5431fc6391726fb5c51bba7a3702366","abstract_canon_sha256":"54966b43546b8abe5a89487a3ddc18e2bf25dfb4014dd5d81d8bf7db83febb0e"},"schema_version":"1.0"},"canonical_sha256":"662de76a246bb5cb90e1bcf471dd9d917cb91c164b67965238c923b179b402ed","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:23:37.104844Z","signature_b64":"qg+St6J7e0F/ZuAbubnKIXM/lT3prAKk4UcVZoLG4S5VDoz5Rkk4vn0TbHHG7epNzVFgzPi6OrVOm4o16QKCAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"662de76a246bb5cb90e1bcf471dd9d917cb91c164b67965238c923b179b402ed","last_reissued_at":"2026-05-18T03:23:37.104137Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:23:37.104137Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1009.2956","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:23:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"awCGtjREYe94R993EWGHvccUvXi2fxSQTTgqZQDpXPfosHRqi2CwcDxlx5ofMBr8eObotl8dX+MskzYtvyJtBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T14:03:19.195237Z"},"content_sha256":"b0280e3a2504d69ac5bdad0231307eb3fc1a0a81de3937144fdd4abe025650ae","schema_version":"1.0","event_id":"sha256:b0280e3a2504d69ac5bdad0231307eb3fc1a0a81de3937144fdd4abe025650ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:MYW6O2RENO24XEHBXT2HDXM5SF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measuring entanglement in condensed matter systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.quant-gas","cond-mat.str-el"],"primary_cat":"quant-ph","authors_text":"H. Wunderlich, M.B. Plenio, M. Cramer","submitted_at":"2010-09-15T15:41:00Z","abstract_excerpt":"We show how entanglement may be quantified in spin and cold atom many-body systems using standard experimental techniques only. The scheme requires no assumptions on the state in the laboratory and a lower bound to the entanglement can be read off directly from the scattering cross section of Neutrons deflected from solid state samples or the time-of-flight distribution of cold atoms in optical lattices, respectively. This removes a major obstacle which so far has prevented the direct and quantitative experimental study of genuine quantum correlations in many-body systems: The need for a full "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.2956","kind":"arxiv","version":1},"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":"2026-05-18T03:23:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5ayFanjPvgou4D2eURDBCZe8dBzypbIglWU7sVzl4qdkheN4E4FBypUf0Ee71CEr1PJB/fMzRpHkoFgX+zj1DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T14:03:19.195902Z"},"content_sha256":"c61a064f3dba704cd732d3a72792459346450ae80e431b6fac5d802f53b9de9a","schema_version":"1.0","event_id":"sha256:c61a064f3dba704cd732d3a72792459346450ae80e431b6fac5d802f53b9de9a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MYW6O2RENO24XEHBXT2HDXM5SF/bundle.json","state_url":"https://pith.science/pith/MYW6O2RENO24XEHBXT2HDXM5SF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MYW6O2RENO24XEHBXT2HDXM5SF/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":"2026-05-24T14:03:19Z","links":{"resolver":"https://pith.science/pith/MYW6O2RENO24XEHBXT2HDXM5SF","bundle":"https://pith.science/pith/MYW6O2RENO24XEHBXT2HDXM5SF/bundle.json","state":"https://pith.science/pith/MYW6O2RENO24XEHBXT2HDXM5SF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MYW6O2RENO24XEHBXT2HDXM5SF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:MYW6O2RENO24XEHBXT2HDXM5SF","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":"54966b43546b8abe5a89487a3ddc18e2bf25dfb4014dd5d81d8bf7db83febb0e","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-09-15T15:41:00Z","title_canon_sha256":"8de8b7f01d427e55774ba8159568ffe5f5431fc6391726fb5c51bba7a3702366"},"schema_version":"1.0","source":{"id":"1009.2956","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.2956","created_at":"2026-05-18T03:23:37Z"},{"alias_kind":"arxiv_version","alias_value":"1009.2956v1","created_at":"2026-05-18T03:23:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.2956","created_at":"2026-05-18T03:23:37Z"},{"alias_kind":"pith_short_12","alias_value":"MYW6O2RENO24","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"MYW6O2RENO24XEHB","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"MYW6O2RE","created_at":"2026-05-18T12:26:10Z"}],"graph_snapshots":[{"event_id":"sha256:c61a064f3dba704cd732d3a72792459346450ae80e431b6fac5d802f53b9de9a","target":"graph","created_at":"2026-05-18T03:23:37Z","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 entanglement may be quantified in spin and cold atom many-body systems using standard experimental techniques only. The scheme requires no assumptions on the state in the laboratory and a lower bound to the entanglement can be read off directly from the scattering cross section of Neutrons deflected from solid state samples or the time-of-flight distribution of cold atoms in optical lattices, respectively. This removes a major obstacle which so far has prevented the direct and quantitative experimental study of genuine quantum correlations in many-body systems: The need for a full ","authors_text":"H. Wunderlich, M.B. Plenio, M. Cramer","cross_cats":["cond-mat.quant-gas","cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-09-15T15:41:00Z","title":"Measuring entanglement in condensed matter systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.2956","kind":"arxiv","version":1},"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:b0280e3a2504d69ac5bdad0231307eb3fc1a0a81de3937144fdd4abe025650ae","target":"record","created_at":"2026-05-18T03:23:37Z","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":"54966b43546b8abe5a89487a3ddc18e2bf25dfb4014dd5d81d8bf7db83febb0e","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-09-15T15:41:00Z","title_canon_sha256":"8de8b7f01d427e55774ba8159568ffe5f5431fc6391726fb5c51bba7a3702366"},"schema_version":"1.0","source":{"id":"1009.2956","kind":"arxiv","version":1}},"canonical_sha256":"662de76a246bb5cb90e1bcf471dd9d917cb91c164b67965238c923b179b402ed","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"662de76a246bb5cb90e1bcf471dd9d917cb91c164b67965238c923b179b402ed","first_computed_at":"2026-05-18T03:23:37.104137Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:23:37.104137Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qg+St6J7e0F/ZuAbubnKIXM/lT3prAKk4UcVZoLG4S5VDoz5Rkk4vn0TbHHG7epNzVFgzPi6OrVOm4o16QKCAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:23:37.104844Z","signed_message":"canonical_sha256_bytes"},"source_id":"1009.2956","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b0280e3a2504d69ac5bdad0231307eb3fc1a0a81de3937144fdd4abe025650ae","sha256:c61a064f3dba704cd732d3a72792459346450ae80e431b6fac5d802f53b9de9a"],"state_sha256":"3c6e18bb4b1e73d68adcb1d8a39c187beff61292ca432fbee32dca7d1f06aa7d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5r7WrlLnY7YtKKK6seix2JyXwZqK+pvAp+mrX1URNres+8/V8kco8n8NRwFy/kV1hSNdwE2lz8uvw8D+zCf2CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T14:03:19.199941Z","bundle_sha256":"aa4f26284c754b0dddd277cea280595d83c67bb7bf23d01ff0ab910df3ac5810"}}