{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:TV35PSE6TZ4UFVHVXXFQPINZUL","short_pith_number":"pith:TV35PSE6","canonical_record":{"source":{"id":"1609.04663","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-15T14:17:26Z","cross_cats_sorted":[],"title_canon_sha256":"54a0456d0bf83850538df255a2d7a48fbc1a509bc5a784d4756abc68fb6b2913","abstract_canon_sha256":"8a73bcc0f84190f73a472adf01396146c1b7f5f2ca107d2ccf8254704706ab1f"},"schema_version":"1.0"},"canonical_sha256":"9d77d7c89e9e7942d4f5bdcb07a1b9a2f78180de1bdddb9132d0e76beae819ee","source":{"kind":"arxiv","id":"1609.04663","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.04663","created_at":"2026-05-18T00:57:10Z"},{"alias_kind":"arxiv_version","alias_value":"1609.04663v1","created_at":"2026-05-18T00:57:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.04663","created_at":"2026-05-18T00:57:10Z"},{"alias_kind":"pith_short_12","alias_value":"TV35PSE6TZ4U","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"TV35PSE6TZ4UFVHV","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"TV35PSE6","created_at":"2026-05-18T12:30:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:TV35PSE6TZ4UFVHVXXFQPINZUL","target":"record","payload":{"canonical_record":{"source":{"id":"1609.04663","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-15T14:17:26Z","cross_cats_sorted":[],"title_canon_sha256":"54a0456d0bf83850538df255a2d7a48fbc1a509bc5a784d4756abc68fb6b2913","abstract_canon_sha256":"8a73bcc0f84190f73a472adf01396146c1b7f5f2ca107d2ccf8254704706ab1f"},"schema_version":"1.0"},"canonical_sha256":"9d77d7c89e9e7942d4f5bdcb07a1b9a2f78180de1bdddb9132d0e76beae819ee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:57:10.605566Z","signature_b64":"ZmcYFa+mMjnm2h26jipk3TOVe0pu2e4pwaaHnNVIeCg2PdGr8Qt9O2UGRicrz0ZqUhpsEb1M+ETkSburfT5tBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d77d7c89e9e7942d4f5bdcb07a1b9a2f78180de1bdddb9132d0e76beae819ee","last_reissued_at":"2026-05-18T00:57:10.605013Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:57:10.605013Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.04663","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":"2026-05-18T00:57:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ArxOmK6+iVibtRnj3v8BkvtAybK+GKRbKGNAXlmrMNc63YhH2ly1oHWWFjentejpkvK0boPaLiy+agcJAzMiDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T11:28:50.359504Z"},"content_sha256":"69399b908ad5308930d8706770381d3c73b16acd1855e3d19813266dcd68d68b","schema_version":"1.0","event_id":"sha256:69399b908ad5308930d8706770381d3c73b16acd1855e3d19813266dcd68d68b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:TV35PSE6TZ4UFVHVXXFQPINZUL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Counter-propagating spontaneous four wave mixing: photon-pair factorability and ultra-narrowband single photon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alfred B. U'Ren, Jorge Monroy-Ruz, Karina Garay-Palmett","submitted_at":"2016-09-15T14:17:26Z","abstract_excerpt":"We introduce a new kind of spontaneous four wave mixing process for the generation of photon pairs, in which the four waves involved counter-propagate in a guided-wave \\chi^{(3)} medium; we refer to this process as counter-propagating spontaneous four wave mixing (CP-SFWM). We show that for the simplest CP-SFWM source, in which all waves propagate in the same polarization and transverse mode and in which self- and cross-phase modulation effects are negligible, phasematching is attained automatically regardless of dispersion in the fiber or waveguide. Furthermore, we show that in two distinct v"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.04663","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":"2026-05-18T00:57:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OCkDBvp5IMLj/gkqUygbEMN0WGoJ5m99IV80Pz6RAjd5LabaEwT/mhUX224J2peZ6QCYuzeM3BRgp04k7ePPAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T11:28:50.359848Z"},"content_sha256":"b4cf8096fe30e4629e278318cb149697b62cc7926952727355ff8065f6b1fa4d","schema_version":"1.0","event_id":"sha256:b4cf8096fe30e4629e278318cb149697b62cc7926952727355ff8065f6b1fa4d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TV35PSE6TZ4UFVHVXXFQPINZUL/bundle.json","state_url":"https://pith.science/pith/TV35PSE6TZ4UFVHVXXFQPINZUL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TV35PSE6TZ4UFVHVXXFQPINZUL/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":"2026-06-24T11:28:50Z","links":{"resolver":"https://pith.science/pith/TV35PSE6TZ4UFVHVXXFQPINZUL","bundle":"https://pith.science/pith/TV35PSE6TZ4UFVHVXXFQPINZUL/bundle.json","state":"https://pith.science/pith/TV35PSE6TZ4UFVHVXXFQPINZUL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TV35PSE6TZ4UFVHVXXFQPINZUL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:TV35PSE6TZ4UFVHVXXFQPINZUL","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":"8a73bcc0f84190f73a472adf01396146c1b7f5f2ca107d2ccf8254704706ab1f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-15T14:17:26Z","title_canon_sha256":"54a0456d0bf83850538df255a2d7a48fbc1a509bc5a784d4756abc68fb6b2913"},"schema_version":"1.0","source":{"id":"1609.04663","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.04663","created_at":"2026-05-18T00:57:10Z"},{"alias_kind":"arxiv_version","alias_value":"1609.04663v1","created_at":"2026-05-18T00:57:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.04663","created_at":"2026-05-18T00:57:10Z"},{"alias_kind":"pith_short_12","alias_value":"TV35PSE6TZ4U","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"TV35PSE6TZ4UFVHV","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"TV35PSE6","created_at":"2026-05-18T12:30:46Z"}],"graph_snapshots":[{"event_id":"sha256:b4cf8096fe30e4629e278318cb149697b62cc7926952727355ff8065f6b1fa4d","target":"graph","created_at":"2026-05-18T00:57:10Z","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":"We introduce a new kind of spontaneous four wave mixing process for the generation of photon pairs, in which the four waves involved counter-propagate in a guided-wave \\chi^{(3)} medium; we refer to this process as counter-propagating spontaneous four wave mixing (CP-SFWM). We show that for the simplest CP-SFWM source, in which all waves propagate in the same polarization and transverse mode and in which self- and cross-phase modulation effects are negligible, phasematching is attained automatically regardless of dispersion in the fiber or waveguide. Furthermore, we show that in two distinct v","authors_text":"Alfred B. U'Ren, Jorge Monroy-Ruz, Karina Garay-Palmett","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-15T14:17:26Z","title":"Counter-propagating spontaneous four wave mixing: photon-pair factorability and ultra-narrowband single photon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.04663","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":"sha256:69399b908ad5308930d8706770381d3c73b16acd1855e3d19813266dcd68d68b","target":"record","created_at":"2026-05-18T00:57:10Z","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":"8a73bcc0f84190f73a472adf01396146c1b7f5f2ca107d2ccf8254704706ab1f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-15T14:17:26Z","title_canon_sha256":"54a0456d0bf83850538df255a2d7a48fbc1a509bc5a784d4756abc68fb6b2913"},"schema_version":"1.0","source":{"id":"1609.04663","kind":"arxiv","version":1}},"canonical_sha256":"9d77d7c89e9e7942d4f5bdcb07a1b9a2f78180de1bdddb9132d0e76beae819ee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9d77d7c89e9e7942d4f5bdcb07a1b9a2f78180de1bdddb9132d0e76beae819ee","first_computed_at":"2026-05-18T00:57:10.605013Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:57:10.605013Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZmcYFa+mMjnm2h26jipk3TOVe0pu2e4pwaaHnNVIeCg2PdGr8Qt9O2UGRicrz0ZqUhpsEb1M+ETkSburfT5tBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:57:10.605566Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.04663","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:69399b908ad5308930d8706770381d3c73b16acd1855e3d19813266dcd68d68b","sha256:b4cf8096fe30e4629e278318cb149697b62cc7926952727355ff8065f6b1fa4d"],"state_sha256":"3e0f4eb7666c4fb566c768a9ce2b453747a8696644fb5ea5167e7591195751a1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9c5NlA7oS0tnEVyiEKo5ABBacNWa59Tf9BQoaqO1kjOGDOACxmPLTqLOz2k4tFhxGwKEg9m5i7fQkQZmVVNZAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T11:28:50.362130Z","bundle_sha256":"c5d57be97aef65376e94aaeeb1448af07458ce011cbea791855c737ca66614ba"}}