{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"581f3f7efe2bdd23dfb4a839083369e8b1d5f8b6e1839ea792534e26af85367c","created":"2026-10-03T07:17:52Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"fc351de834b411d044babbc7162aea6152f27f9838a8fbd8610f38ee256e3508","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"qi.contextuality-nonlocality","field":"qi","n":"1","review_cite":"Budroni, Cabello, Guhne, Kleinmann, Larsson, Kochen-Specker contextuality, Reviews of Modern Physics, 2022","review_link":"https://arxiv.org/abs/2102.13036","review_verified":"true","summary":"Quantum measurement results cannot be explained as pre-existing values that are simply revealed: distant particles are correlated too strongly (nonlocality), and a result would have to depend on which other measurements are made alongside it (contextuality). Many quantitative questions about both effects are unsolved.","title":"Contextuality and Bell nonlocality","topic_ref":null,"why":"They mark the boundary between quantum and classical behavior and underlie device-independent cryptography and quantum computational speedups."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"b07684c5fe91d012cf3f7701521f464b6170695b71db99db565aa3f747a6411c","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"21233b67f06dbbf01ce6a98e17784a5aeb40b29b535b4ead638b3f09d80f227d","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"gY1PBlDrXH-oQ-bgCTBjmF8YG--vh_I-gpgqg4TgiSfKwfW7nhBQlYLCod3aA0M8WBfarLXPa3yVTR6ylKKYAw"},"schema":"pubphys.envelope/1"},"record_hash":"b07684c5fe91d012cf3f7701521f464b6170695b71db99db565aa3f747a6411c","leaf_index":331}