{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:4UPQBACZB5NAL2BRZVT7CJUBRV","short_pith_number":"pith:4UPQBACZ","schema_version":"1.0","canonical_sha256":"e51f0080590f5a05e831cd67f126818d734d08ebad49b2fa5284dc371c43f80d","source":{"kind":"arxiv","id":"1101.2540","version":1},"attestation_state":"computed","paper":{"title":"Spin Correlations in $e^{+}e^{-}$ Pair Creation by Two-Photons and Entanglement in QED","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"quant-ph","authors_text":"N. Yongram","submitted_at":"2011-01-13T11:33:34Z","abstract_excerpt":"Spin correlations of $e^{+}e^{-}$ pair productions of two colliding photons are investigated and explicit expressions for their corresponding probabilities are derived and found to be \\textit{energy} (speed) dependent, for initially \\textit{linearly} and \\textit{circularly polarized} photons, different from those obtained by simply combining the spins of the relevant particles, for initially \\textit{polarized} photons. These expressions also depend on the angles of spin of $e^{+}$ (and/or of $e^{-}$), for initially {\\it linearly polarized} photons, but not for {\\it circularly polarized} photon"},"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":"1101.2540","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-01-13T11:33:34Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"398eae0d78500152a68faf802c7ea40dad13b15a94eb8e726ab49871c922347c","abstract_canon_sha256":"1c8ff2aea559e9802834954548d99ce25ceee66c3d053b99a199561b845b5b7c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:22:57.955086Z","signature_b64":"t+fh9x4q+fCv9/R24lPON6f18nYnk63osVPKhyQmUh1wZ96t8jcSr0J3rQ8EbRlGLHJQPOY6uhnRUcvqVMxjCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e51f0080590f5a05e831cd67f126818d734d08ebad49b2fa5284dc371c43f80d","last_reissued_at":"2026-05-18T02:22:57.954395Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:22:57.954395Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Spin Correlations in $e^{+}e^{-}$ Pair Creation by Two-Photons and Entanglement in QED","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"quant-ph","authors_text":"N. Yongram","submitted_at":"2011-01-13T11:33:34Z","abstract_excerpt":"Spin correlations of $e^{+}e^{-}$ pair productions of two colliding photons are investigated and explicit expressions for their corresponding probabilities are derived and found to be \\textit{energy} (speed) dependent, for initially \\textit{linearly} and \\textit{circularly polarized} photons, different from those obtained by simply combining the spins of the relevant particles, for initially \\textit{polarized} photons. These expressions also depend on the angles of spin of $e^{+}$ (and/or of $e^{-}$), for initially {\\it linearly polarized} photons, but not for {\\it circularly polarized} photon"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.2540","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1101.2540","created_at":"2026-05-18T02:22:57.954509+00:00"},{"alias_kind":"arxiv_version","alias_value":"1101.2540v1","created_at":"2026-05-18T02:22:57.954509+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.2540","created_at":"2026-05-18T02:22:57.954509+00:00"},{"alias_kind":"pith_short_12","alias_value":"4UPQBACZB5NA","created_at":"2026-05-18T12:26:20.644004+00:00"},{"alias_kind":"pith_short_16","alias_value":"4UPQBACZB5NAL2BR","created_at":"2026-05-18T12:26:20.644004+00:00"},{"alias_kind":"pith_short_8","alias_value":"4UPQBACZ","created_at":"2026-05-18T12:26:20.644004+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4UPQBACZB5NAL2BRZVT7CJUBRV","json":"https://pith.science/pith/4UPQBACZB5NAL2BRZVT7CJUBRV.json","graph_json":"https://pith.science/api/pith-number/4UPQBACZB5NAL2BRZVT7CJUBRV/graph.json","events_json":"https://pith.science/api/pith-number/4UPQBACZB5NAL2BRZVT7CJUBRV/events.json","paper":"https://pith.science/paper/4UPQBACZ"},"agent_actions":{"view_html":"https://pith.science/pith/4UPQBACZB5NAL2BRZVT7CJUBRV","download_json":"https://pith.science/pith/4UPQBACZB5NAL2BRZVT7CJUBRV.json","view_paper":"https://pith.science/paper/4UPQBACZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1101.2540&json=true","fetch_graph":"https://pith.science/api/pith-number/4UPQBACZB5NAL2BRZVT7CJUBRV/graph.json","fetch_events":"https://pith.science/api/pith-number/4UPQBACZB5NAL2BRZVT7CJUBRV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4UPQBACZB5NAL2BRZVT7CJUBRV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4UPQBACZB5NAL2BRZVT7CJUBRV/action/storage_attestation","attest_author":"https://pith.science/pith/4UPQBACZB5NAL2BRZVT7CJUBRV/action/author_attestation","sign_citation":"https://pith.science/pith/4UPQBACZB5NAL2BRZVT7CJUBRV/action/citation_signature","submit_replication":"https://pith.science/pith/4UPQBACZB5NAL2BRZVT7CJUBRV/action/replication_record"}},"created_at":"2026-05-18T02:22:57.954509+00:00","updated_at":"2026-05-18T02:22:57.954509+00:00"}