{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:2L5TJWXQOSZGSUJ6QIV52NDFEF","short_pith_number":"pith:2L5TJWXQ","schema_version":"1.0","canonical_sha256":"d2fb34daf074b269513e822bdd3465217f5f4b938fc981517bd6668b73a5408c","source":{"kind":"arxiv","id":"2407.11570","version":1},"attestation_state":"computed","paper":{"title":"Undergraduate setup for measuring the Bell inequalities and performing Quantum State Tomography","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.ed-ph","authors_text":"Adri\\`a Br\\'u i Cort\\'es, Bruno Juli\\'a-D\\'iaz, Jose M. G\\'omez Cama, Lidia Lozano Mart\\'in, Mart\\'i Duocastella, Raul Lahoz Sanz","submitted_at":"2024-07-16T10:22:30Z","abstract_excerpt":"The growth of quantum technologies is attracting the interest of many students eager to learn concepts such as quantum entanglement or quantum superposition. However, the non-intuitive nature of these concepts poses a challenge to understanding them. Here, we present an entangled photon system which can perform a Bell test, i.e. the CHSH inequality, and can obtain the complete tomography of the two-photon state. The proposed setup is versatile, cost-effective and allows for multiple classroom operating modes. We present two variants, both facilitating the measurement of Bell inequalities and q"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2407.11570","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2024-07-16T10:22:30Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"d665ac8b14ee918b7c771bb99973c9ec085940bea2e5c6442dd24e9207268a14","abstract_canon_sha256":"5b8f1af88fa8979258a9d0f0ec06e07a8c06a20bb85d6d4df6cc744ff36cc8c9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:44:26.348758Z","signature_b64":"2+raKHL5d8CKDie0DN7jKmINUb/UIBrIpRwsiS48QSNBOy880EpOIq70PfmrlW29JAbAtDNFsjsJrvv8GnDfDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2fb34daf074b269513e822bdd3465217f5f4b938fc981517bd6668b73a5408c","last_reissued_at":"2026-07-05T08:44:26.348243Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:44:26.348243Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Undergraduate setup for measuring the Bell inequalities and performing Quantum State Tomography","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.ed-ph","authors_text":"Adri\\`a Br\\'u i Cort\\'es, Bruno Juli\\'a-D\\'iaz, Jose M. G\\'omez Cama, Lidia Lozano Mart\\'in, Mart\\'i Duocastella, Raul Lahoz Sanz","submitted_at":"2024-07-16T10:22:30Z","abstract_excerpt":"The growth of quantum technologies is attracting the interest of many students eager to learn concepts such as quantum entanglement or quantum superposition. However, the non-intuitive nature of these concepts poses a challenge to understanding them. Here, we present an entangled photon system which can perform a Bell test, i.e. the CHSH inequality, and can obtain the complete tomography of the two-photon state. The proposed setup is versatile, cost-effective and allows for multiple classroom operating modes. We present two variants, both facilitating the measurement of Bell inequalities and q"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.11570","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2407.11570/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2407.11570","created_at":"2026-07-05T08:44:26.348312+00:00"},{"alias_kind":"arxiv_version","alias_value":"2407.11570v1","created_at":"2026-07-05T08:44:26.348312+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.11570","created_at":"2026-07-05T08:44:26.348312+00:00"},{"alias_kind":"pith_short_12","alias_value":"2L5TJWXQOSZG","created_at":"2026-07-05T08:44:26.348312+00:00"},{"alias_kind":"pith_short_16","alias_value":"2L5TJWXQOSZGSUJ6","created_at":"2026-07-05T08:44:26.348312+00:00"},{"alias_kind":"pith_short_8","alias_value":"2L5TJWXQ","created_at":"2026-07-05T08:44:26.348312+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2503.22701","citing_title":"Quantum Port: Gamification of quantum teleportation for public engagement","ref_index":19,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/2L5TJWXQOSZGSUJ6QIV52NDFEF","json":"https://pith.science/pith/2L5TJWXQOSZGSUJ6QIV52NDFEF.json","graph_json":"https://pith.science/api/pith-number/2L5TJWXQOSZGSUJ6QIV52NDFEF/graph.json","events_json":"https://pith.science/api/pith-number/2L5TJWXQOSZGSUJ6QIV52NDFEF/events.json","paper":"https://pith.science/paper/2L5TJWXQ"},"agent_actions":{"view_html":"https://pith.science/pith/2L5TJWXQOSZGSUJ6QIV52NDFEF","download_json":"https://pith.science/pith/2L5TJWXQOSZGSUJ6QIV52NDFEF.json","view_paper":"https://pith.science/paper/2L5TJWXQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2407.11570&json=true","fetch_graph":"https://pith.science/api/pith-number/2L5TJWXQOSZGSUJ6QIV52NDFEF/graph.json","fetch_events":"https://pith.science/api/pith-number/2L5TJWXQOSZGSUJ6QIV52NDFEF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2L5TJWXQOSZGSUJ6QIV52NDFEF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2L5TJWXQOSZGSUJ6QIV52NDFEF/action/storage_attestation","attest_author":"https://pith.science/pith/2L5TJWXQOSZGSUJ6QIV52NDFEF/action/author_attestation","sign_citation":"https://pith.science/pith/2L5TJWXQOSZGSUJ6QIV52NDFEF/action/citation_signature","submit_replication":"https://pith.science/pith/2L5TJWXQOSZGSUJ6QIV52NDFEF/action/replication_record"}},"created_at":"2026-07-05T08:44:26.348312+00:00","updated_at":"2026-07-05T08:44:26.348312+00:00"}