{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:ECRXOF32BM4O4HQDDQM4CW5XK7","short_pith_number":"pith:ECRXOF32","schema_version":"1.0","canonical_sha256":"20a377177a0b38ee1e031c19c15bb757e56d9c54a07118ddf50f3cebec099f53","source":{"kind":"arxiv","id":"1112.4551","version":1},"attestation_state":"computed","paper":{"title":"Compact source of narrow-band counterpropagating polarization-entangled photon pairs using a single dual-periodically poled crystal","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Peng Xue, Ping Xu, Shi-Ning Zhu, Xiao-Qiang Yu, Yan-Xiao Gong, Zhen-Da Xie","submitted_at":"2011-12-20T03:01:53Z","abstract_excerpt":"We propose a scheme for the generation of counterpropagating polarization-entangled photon pairs from a dual-periodically poled crystal. Compared with the usual forward-wave type source, this source, in the backward-wave way, has a much narrower bandwidth. With a 2-cm-long bulk crystal, the bandwidths of the example sources are estimated to be 3.6 GHz, and the spectral brightnesses are more than 100 pairs/(s GHz mW). Two concurrent quasi-phase-matched spontaneous parametric down-conversion processes in a single crystal enable our source to be compact and stable. This scheme does not rely on an"},"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":"1112.4551","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-12-20T03:01:53Z","cross_cats_sorted":[],"title_canon_sha256":"85ddfe51de2a8a891f5c9a89ab4a5f76b3b44db3a5ec63537c033da6e95abacf","abstract_canon_sha256":"d6aad4f3cfde5e9c2d455a9cd175b0b5f6198af428f3000a830359a61165d0a4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:05:58.574546Z","signature_b64":"DTBO3gQXHXiKNezFeGcPzmY8XUm/4FUrg9mIELUhG/oQ3Pmss+CMVnY537s3u73Dh4gNnybnUw4QpObdzny2Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"20a377177a0b38ee1e031c19c15bb757e56d9c54a07118ddf50f3cebec099f53","last_reissued_at":"2026-05-18T04:05:58.573677Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:05:58.573677Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Compact source of narrow-band counterpropagating polarization-entangled photon pairs using a single dual-periodically poled crystal","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Peng Xue, Ping Xu, Shi-Ning Zhu, Xiao-Qiang Yu, Yan-Xiao Gong, Zhen-Da Xie","submitted_at":"2011-12-20T03:01:53Z","abstract_excerpt":"We propose a scheme for the generation of counterpropagating polarization-entangled photon pairs from a dual-periodically poled crystal. Compared with the usual forward-wave type source, this source, in the backward-wave way, has a much narrower bandwidth. With a 2-cm-long bulk crystal, the bandwidths of the example sources are estimated to be 3.6 GHz, and the spectral brightnesses are more than 100 pairs/(s GHz mW). Two concurrent quasi-phase-matched spontaneous parametric down-conversion processes in a single crystal enable our source to be compact and stable. This scheme does not rely on an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.4551","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":"1112.4551","created_at":"2026-05-18T04:05:58.573836+00:00"},{"alias_kind":"arxiv_version","alias_value":"1112.4551v1","created_at":"2026-05-18T04:05:58.573836+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.4551","created_at":"2026-05-18T04:05:58.573836+00:00"},{"alias_kind":"pith_short_12","alias_value":"ECRXOF32BM4O","created_at":"2026-05-18T12:26:26.731475+00:00"},{"alias_kind":"pith_short_16","alias_value":"ECRXOF32BM4O4HQD","created_at":"2026-05-18T12:26:26.731475+00:00"},{"alias_kind":"pith_short_8","alias_value":"ECRXOF32","created_at":"2026-05-18T12:26:26.731475+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/ECRXOF32BM4O4HQDDQM4CW5XK7","json":"https://pith.science/pith/ECRXOF32BM4O4HQDDQM4CW5XK7.json","graph_json":"https://pith.science/api/pith-number/ECRXOF32BM4O4HQDDQM4CW5XK7/graph.json","events_json":"https://pith.science/api/pith-number/ECRXOF32BM4O4HQDDQM4CW5XK7/events.json","paper":"https://pith.science/paper/ECRXOF32"},"agent_actions":{"view_html":"https://pith.science/pith/ECRXOF32BM4O4HQDDQM4CW5XK7","download_json":"https://pith.science/pith/ECRXOF32BM4O4HQDDQM4CW5XK7.json","view_paper":"https://pith.science/paper/ECRXOF32","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1112.4551&json=true","fetch_graph":"https://pith.science/api/pith-number/ECRXOF32BM4O4HQDDQM4CW5XK7/graph.json","fetch_events":"https://pith.science/api/pith-number/ECRXOF32BM4O4HQDDQM4CW5XK7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ECRXOF32BM4O4HQDDQM4CW5XK7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ECRXOF32BM4O4HQDDQM4CW5XK7/action/storage_attestation","attest_author":"https://pith.science/pith/ECRXOF32BM4O4HQDDQM4CW5XK7/action/author_attestation","sign_citation":"https://pith.science/pith/ECRXOF32BM4O4HQDDQM4CW5XK7/action/citation_signature","submit_replication":"https://pith.science/pith/ECRXOF32BM4O4HQDDQM4CW5XK7/action/replication_record"}},"created_at":"2026-05-18T04:05:58.573836+00:00","updated_at":"2026-05-18T04:05:58.573836+00:00"}