{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:6QU67KD62Z6LGTRDQO64SWG24K","short_pith_number":"pith:6QU67KD6","canonical_record":{"source":{"id":"2404.07421","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-04-11T01:22:41Z","cross_cats_sorted":[],"title_canon_sha256":"35804baeb65fa14ee74ca188fa722de32ecc534d494ed7e2c72d5f868ff2874f","abstract_canon_sha256":"671e5358184d3be4b0a17b9a58e66b6b85d031f5947fc295bbf5e5b01fc1742c"},"schema_version":"1.0"},"canonical_sha256":"f429efa87ed67cb34e2383bdc958dae29c0d1c5027a702a784d8126ff6d1644c","source":{"kind":"arxiv","id":"2404.07421","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.07421","created_at":"2026-07-05T08:06:52Z"},{"alias_kind":"arxiv_version","alias_value":"2404.07421v1","created_at":"2026-07-05T08:06:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.07421","created_at":"2026-07-05T08:06:52Z"},{"alias_kind":"pith_short_12","alias_value":"6QU67KD62Z6L","created_at":"2026-07-05T08:06:52Z"},{"alias_kind":"pith_short_16","alias_value":"6QU67KD62Z6LGTRD","created_at":"2026-07-05T08:06:52Z"},{"alias_kind":"pith_short_8","alias_value":"6QU67KD6","created_at":"2026-07-05T08:06:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:6QU67KD62Z6LGTRDQO64SWG24K","target":"record","payload":{"canonical_record":{"source":{"id":"2404.07421","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-04-11T01:22:41Z","cross_cats_sorted":[],"title_canon_sha256":"35804baeb65fa14ee74ca188fa722de32ecc534d494ed7e2c72d5f868ff2874f","abstract_canon_sha256":"671e5358184d3be4b0a17b9a58e66b6b85d031f5947fc295bbf5e5b01fc1742c"},"schema_version":"1.0"},"canonical_sha256":"f429efa87ed67cb34e2383bdc958dae29c0d1c5027a702a784d8126ff6d1644c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:06:52.343720Z","signature_b64":"ML8PMBsfs1aSfvk5n1Bt7McM4gLhi7ERYmJ+hYp1eOxjj5QQkHyHWa0S/Jatjr0WToejf7rrCuaHXFv3oa0ACQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f429efa87ed67cb34e2383bdc958dae29c0d1c5027a702a784d8126ff6d1644c","last_reissued_at":"2026-07-05T08:06:52.343275Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:06:52.343275Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2404.07421","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":"2026-07-05T08:06:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2YA7ZzKwy0nwU4+QqmebFM8m7oMUoShx/5yoGsfcb09XztZ4lhqCvrRlAeOp2g2O8PF/xTYWQDhqN0M4APcMAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T19:08:10.709334Z"},"content_sha256":"b192dcf843a50833ec701612ae53851235e74f79f573cd3d8e03016461fb1b17","schema_version":"1.0","event_id":"sha256:b192dcf843a50833ec701612ae53851235e74f79f573cd3d8e03016461fb1b17"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:6QU67KD62Z6LGTRDQO64SWG24K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Controllable transitions among phase-matching conditions in a single nonlinear crystal","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Chenglong You, Chenzhi Yuan, Rui-Bo Jin, Shi-Xin You, Zi-Qi Zeng, Zi-Xiang Yang","submitted_at":"2024-04-11T01:22:41Z","abstract_excerpt":"Entangled photon pairs are crucial resources for quantum information processing protocols. Via the process of spontaneous parametric down-conversion (SPDC), we can generate these photon pairs using bulk nonlinear crystals. Traditionally, the crystal is designed to satisfy specific type of phase-matching condition. Here, we report controllable transitions among different types of phase-matching in a single periodically poled potassium titanyl phosphate (PPKTP) crystal. By carefully selecting pump conditions, we can satisfy different phase-matching conditions. This allows us to observe first-ord"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.07421","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/2404.07421/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:06:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WYwuPyrU2pVPRTk5MOWLGJ9lFfv9wYZFVWlhP4KEOod/4cyKzouFnqzcGr+qI51p7CIur/RiM0ClmYgl630uCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T19:08:10.709737Z"},"content_sha256":"cd4cae6f64e4887f8893c154889abb36289ef776f744a125c3ad2dee3377fb8c","schema_version":"1.0","event_id":"sha256:cd4cae6f64e4887f8893c154889abb36289ef776f744a125c3ad2dee3377fb8c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6QU67KD62Z6LGTRDQO64SWG24K/bundle.json","state_url":"https://pith.science/pith/6QU67KD62Z6LGTRDQO64SWG24K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6QU67KD62Z6LGTRDQO64SWG24K/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":"2026-08-20T19:08:10Z","links":{"resolver":"https://pith.science/pith/6QU67KD62Z6LGTRDQO64SWG24K","bundle":"https://pith.science/pith/6QU67KD62Z6LGTRDQO64SWG24K/bundle.json","state":"https://pith.science/pith/6QU67KD62Z6LGTRDQO64SWG24K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6QU67KD62Z6LGTRDQO64SWG24K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:6QU67KD62Z6LGTRDQO64SWG24K","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":"671e5358184d3be4b0a17b9a58e66b6b85d031f5947fc295bbf5e5b01fc1742c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-04-11T01:22:41Z","title_canon_sha256":"35804baeb65fa14ee74ca188fa722de32ecc534d494ed7e2c72d5f868ff2874f"},"schema_version":"1.0","source":{"id":"2404.07421","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.07421","created_at":"2026-07-05T08:06:52Z"},{"alias_kind":"arxiv_version","alias_value":"2404.07421v1","created_at":"2026-07-05T08:06:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.07421","created_at":"2026-07-05T08:06:52Z"},{"alias_kind":"pith_short_12","alias_value":"6QU67KD62Z6L","created_at":"2026-07-05T08:06:52Z"},{"alias_kind":"pith_short_16","alias_value":"6QU67KD62Z6LGTRD","created_at":"2026-07-05T08:06:52Z"},{"alias_kind":"pith_short_8","alias_value":"6QU67KD6","created_at":"2026-07-05T08:06:52Z"}],"graph_snapshots":[{"event_id":"sha256:cd4cae6f64e4887f8893c154889abb36289ef776f744a125c3ad2dee3377fb8c","target":"graph","created_at":"2026-07-05T08:06:52Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2404.07421/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Entangled photon pairs are crucial resources for quantum information processing protocols. Via the process of spontaneous parametric down-conversion (SPDC), we can generate these photon pairs using bulk nonlinear crystals. Traditionally, the crystal is designed to satisfy specific type of phase-matching condition. Here, we report controllable transitions among different types of phase-matching in a single periodically poled potassium titanyl phosphate (PPKTP) crystal. By carefully selecting pump conditions, we can satisfy different phase-matching conditions. This allows us to observe first-ord","authors_text":"Chenglong You, Chenzhi Yuan, Rui-Bo Jin, Shi-Xin You, Zi-Qi Zeng, Zi-Xiang Yang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-04-11T01:22:41Z","title":"Controllable transitions among phase-matching conditions in a single nonlinear crystal"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.07421","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:b192dcf843a50833ec701612ae53851235e74f79f573cd3d8e03016461fb1b17","target":"record","created_at":"2026-07-05T08:06:52Z","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":"671e5358184d3be4b0a17b9a58e66b6b85d031f5947fc295bbf5e5b01fc1742c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-04-11T01:22:41Z","title_canon_sha256":"35804baeb65fa14ee74ca188fa722de32ecc534d494ed7e2c72d5f868ff2874f"},"schema_version":"1.0","source":{"id":"2404.07421","kind":"arxiv","version":1}},"canonical_sha256":"f429efa87ed67cb34e2383bdc958dae29c0d1c5027a702a784d8126ff6d1644c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f429efa87ed67cb34e2383bdc958dae29c0d1c5027a702a784d8126ff6d1644c","first_computed_at":"2026-07-05T08:06:52.343275Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:06:52.343275Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ML8PMBsfs1aSfvk5n1Bt7McM4gLhi7ERYmJ+hYp1eOxjj5QQkHyHWa0S/Jatjr0WToejf7rrCuaHXFv3oa0ACQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:06:52.343720Z","signed_message":"canonical_sha256_bytes"},"source_id":"2404.07421","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b192dcf843a50833ec701612ae53851235e74f79f573cd3d8e03016461fb1b17","sha256:cd4cae6f64e4887f8893c154889abb36289ef776f744a125c3ad2dee3377fb8c"],"state_sha256":"813470f96a51929c5fc8d394c250c9ceed3e301f5376eaaa30ebb9e278ce21be"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3+YTQnvg2hZphU/q8m2Jk9+31aYAETskt5cQLfyz1Y4NcJ6Q1bguxjvP9sGWg6V4DtY2X7CZQS3XhHN46t9wDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T19:08:10.712147Z","bundle_sha256":"44db7938a42b320743cac68284d40414f26e73217589638d7fd6061e5ca3bc60"}}