{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:OM7NKPSXBRW5CO4U4EQ3PWAMU3","short_pith_number":"pith:OM7NKPSX","canonical_record":{"source":{"id":"0905.2998","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-18T22:36:58Z","cross_cats_sorted":[],"title_canon_sha256":"0bc81e8219522f295b37203c98a9ee4f76af59f0018a57372873c08672c8e85f","abstract_canon_sha256":"283acb28d12963060b52ef7f85052afe1f3a5915deb81efe03104115dcf3bbf0"},"schema_version":"1.0"},"canonical_sha256":"733ed53e570c6dd13b94e121b7d80ca6c6e279dac94c94c198a7412d501ef77b","source":{"kind":"arxiv","id":"0905.2998","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.2998","created_at":"2026-05-18T03:24:06Z"},{"alias_kind":"arxiv_version","alias_value":"0905.2998v1","created_at":"2026-05-18T03:24:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.2998","created_at":"2026-05-18T03:24:06Z"},{"alias_kind":"pith_short_12","alias_value":"OM7NKPSXBRW5","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"OM7NKPSXBRW5CO4U","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"OM7NKPSX","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:OM7NKPSXBRW5CO4U4EQ3PWAMU3","target":"record","payload":{"canonical_record":{"source":{"id":"0905.2998","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-18T22:36:58Z","cross_cats_sorted":[],"title_canon_sha256":"0bc81e8219522f295b37203c98a9ee4f76af59f0018a57372873c08672c8e85f","abstract_canon_sha256":"283acb28d12963060b52ef7f85052afe1f3a5915deb81efe03104115dcf3bbf0"},"schema_version":"1.0"},"canonical_sha256":"733ed53e570c6dd13b94e121b7d80ca6c6e279dac94c94c198a7412d501ef77b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:24:06.320504Z","signature_b64":"ngHzJ1HpJpRe+tk1s5ig0/abh276p7hifyxyCYzxPLjCbm8uhuiNE66/6ue7NzO1IIaJizzHVLctqVRg/g4KAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"733ed53e570c6dd13b94e121b7d80ca6c6e279dac94c94c198a7412d501ef77b","last_reissued_at":"2026-05-18T03:24:06.319979Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:24:06.319979Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0905.2998","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":"2026-05-18T03:24:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p8Q/XqSRbdQAFu4UR18pW9neQiaX929GS+qXIJlLjFw4uItlUBDKsVlVvJ8wTfdUYfzd6KIvY5YDfRhn785UBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T02:40:15.651671Z"},"content_sha256":"f418ed9ac1c0b3bfd91b118ef5612f2a3635e657392aa3444d06482facfb094c","schema_version":"1.0","event_id":"sha256:f418ed9ac1c0b3bfd91b118ef5612f2a3635e657392aa3444d06482facfb094c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:OM7NKPSXBRW5CO4U4EQ3PWAMU3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measurements incompatible in Quantum Theory cannot be measured jointly in any other local theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Carlos Fernandez, David Perez-Garcia, Michael M. Wolf","submitted_at":"2009-05-18T22:36:58Z","abstract_excerpt":"It is well known that jointly measurable observables cannot lead to a violation of any Bell inequality - independent of the state and the measurements chosen at the other site. In this letter we prove the converse: every pair of incompatible quantum observables enables the violation of a Bell inequality and therefore must remain incompatible within any other no-signaling theory. While in the case of von Neumann measurements it is sufficient to use the same pair of observables at both sites, general measurements can require different choices. The main result is obtained by showing that for arbi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.2998","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":"2026-05-18T03:24:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q6us0Chu22oZu+AiWfucw3v6wFioiUbENC4Pm+qLhtwN+b1RkXvbWrQ2lNVtv0cSDP/tSNBDkc5ByLAXHszSCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T02:40:15.652019Z"},"content_sha256":"411f915cb4c7b12f57f633e24a2eed667c1b910293531290b579df913b095e51","schema_version":"1.0","event_id":"sha256:411f915cb4c7b12f57f633e24a2eed667c1b910293531290b579df913b095e51"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OM7NKPSXBRW5CO4U4EQ3PWAMU3/bundle.json","state_url":"https://pith.science/pith/OM7NKPSXBRW5CO4U4EQ3PWAMU3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OM7NKPSXBRW5CO4U4EQ3PWAMU3/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":"2026-05-28T02:40:15Z","links":{"resolver":"https://pith.science/pith/OM7NKPSXBRW5CO4U4EQ3PWAMU3","bundle":"https://pith.science/pith/OM7NKPSXBRW5CO4U4EQ3PWAMU3/bundle.json","state":"https://pith.science/pith/OM7NKPSXBRW5CO4U4EQ3PWAMU3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OM7NKPSXBRW5CO4U4EQ3PWAMU3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:OM7NKPSXBRW5CO4U4EQ3PWAMU3","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":"283acb28d12963060b52ef7f85052afe1f3a5915deb81efe03104115dcf3bbf0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-18T22:36:58Z","title_canon_sha256":"0bc81e8219522f295b37203c98a9ee4f76af59f0018a57372873c08672c8e85f"},"schema_version":"1.0","source":{"id":"0905.2998","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.2998","created_at":"2026-05-18T03:24:06Z"},{"alias_kind":"arxiv_version","alias_value":"0905.2998v1","created_at":"2026-05-18T03:24:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.2998","created_at":"2026-05-18T03:24:06Z"},{"alias_kind":"pith_short_12","alias_value":"OM7NKPSXBRW5","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"OM7NKPSXBRW5CO4U","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"OM7NKPSX","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:411f915cb4c7b12f57f633e24a2eed667c1b910293531290b579df913b095e51","target":"graph","created_at":"2026-05-18T03:24:06Z","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":"It is well known that jointly measurable observables cannot lead to a violation of any Bell inequality - independent of the state and the measurements chosen at the other site. In this letter we prove the converse: every pair of incompatible quantum observables enables the violation of a Bell inequality and therefore must remain incompatible within any other no-signaling theory. While in the case of von Neumann measurements it is sufficient to use the same pair of observables at both sites, general measurements can require different choices. The main result is obtained by showing that for arbi","authors_text":"Carlos Fernandez, David Perez-Garcia, Michael M. Wolf","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-18T22:36:58Z","title":"Measurements incompatible in Quantum Theory cannot be measured jointly in any other local theory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.2998","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:f418ed9ac1c0b3bfd91b118ef5612f2a3635e657392aa3444d06482facfb094c","target":"record","created_at":"2026-05-18T03:24:06Z","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":"283acb28d12963060b52ef7f85052afe1f3a5915deb81efe03104115dcf3bbf0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-18T22:36:58Z","title_canon_sha256":"0bc81e8219522f295b37203c98a9ee4f76af59f0018a57372873c08672c8e85f"},"schema_version":"1.0","source":{"id":"0905.2998","kind":"arxiv","version":1}},"canonical_sha256":"733ed53e570c6dd13b94e121b7d80ca6c6e279dac94c94c198a7412d501ef77b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"733ed53e570c6dd13b94e121b7d80ca6c6e279dac94c94c198a7412d501ef77b","first_computed_at":"2026-05-18T03:24:06.319979Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:24:06.319979Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ngHzJ1HpJpRe+tk1s5ig0/abh276p7hifyxyCYzxPLjCbm8uhuiNE66/6ue7NzO1IIaJizzHVLctqVRg/g4KAg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:24:06.320504Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.2998","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f418ed9ac1c0b3bfd91b118ef5612f2a3635e657392aa3444d06482facfb094c","sha256:411f915cb4c7b12f57f633e24a2eed667c1b910293531290b579df913b095e51"],"state_sha256":"8bf6642e3c9f636b0bc3cad2844254030044d7f3dcdfe0b15afbac948615228e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9tjimOmOC4smq4nicpFM1hWjKNUZWtcQxhna4kh6Y+Nj38yRzNdYnO2a9+iY1X5RlI900vCcGZnD+aFtG1SRDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T02:40:15.653981Z","bundle_sha256":"1f4ccc98358d13ca8e01ac2106e701b719e4a55bc3be15c592d1b3bf68f63148"}}