{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:M5FC5BMHFIQ7VP2KTN4EA7JMSM","short_pith_number":"pith:M5FC5BMH","canonical_record":{"source":{"id":"1211.2885","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-11-13T04:08:39Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"796b74e8bdcb2213acba8cb14e8f653406db3edd4a5680c0093bf1b6d6f7eb60","abstract_canon_sha256":"d711afe4cf98db74d4b2974a0c340c9e48f5e0816cd335d927a9c69d137e63db"},"schema_version":"1.0"},"canonical_sha256":"674a2e85872a21fabf4a9b78407d2c9326887146f8d687dfb2d47b01bce819c6","source":{"kind":"arxiv","id":"1211.2885","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.2885","created_at":"2026-05-18T03:40:52Z"},{"alias_kind":"arxiv_version","alias_value":"1211.2885v1","created_at":"2026-05-18T03:40:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.2885","created_at":"2026-05-18T03:40:52Z"},{"alias_kind":"pith_short_12","alias_value":"M5FC5BMHFIQ7","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"M5FC5BMHFIQ7VP2K","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"M5FC5BMH","created_at":"2026-05-18T12:27:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:M5FC5BMHFIQ7VP2KTN4EA7JMSM","target":"record","payload":{"canonical_record":{"source":{"id":"1211.2885","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-11-13T04:08:39Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"796b74e8bdcb2213acba8cb14e8f653406db3edd4a5680c0093bf1b6d6f7eb60","abstract_canon_sha256":"d711afe4cf98db74d4b2974a0c340c9e48f5e0816cd335d927a9c69d137e63db"},"schema_version":"1.0"},"canonical_sha256":"674a2e85872a21fabf4a9b78407d2c9326887146f8d687dfb2d47b01bce819c6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:40:52.444745Z","signature_b64":"LBZHabBcE6zbmp5YH4h63d6QCwLKM/fj9KvKQw4DlDiflg4cUNetBeXzYa3Dj2ckac+f1i33ph2XAA7M/+x2Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"674a2e85872a21fabf4a9b78407d2c9326887146f8d687dfb2d47b01bce819c6","last_reissued_at":"2026-05-18T03:40:52.443830Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:40:52.443830Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.2885","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":"2026-05-18T03:40:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rc+E7SJwgYJ6kl54aH9n4WoUqWH24Zk2/LEpZ3vQGILuPIV9TsIMB/OIKitUOWf8ycBypNHChHH0y9srJnbGDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T20:29:36.941294Z"},"content_sha256":"e27cd9813fc455c2d8337da7cf1018a3eebc2c3ff68d46f202c6d7cb9bdf708a","schema_version":"1.0","event_id":"sha256:e27cd9813fc455c2d8337da7cf1018a3eebc2c3ff68d46f202c6d7cb9bdf708a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:M5FC5BMHFIQ7VP2KTN4EA7JMSM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A monolithically integrated polarization entangled photon pair source on a silicon chip","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Hanna Le Jeannic, Hiroki Takesue, Hiroshi Fukuda, Kaoru Shimizu, Koji Yamada, Nobuyuki Matsuda, Tai Tsuchizawa, William John Munro, Yasuhiro Tokura","submitted_at":"2012-11-13T04:08:39Z","abstract_excerpt":"Integrated photonic circuits are one of the most promising platforms for large-scale photonic quantum information systems due to their small physical size and stable interferometers with near-perfect lateral-mode overlaps. Since many quantum information protocols are based on qubits defined by the polarization of photons, we must develop integrated building blocks to generate, manipulate, and measure the polarization-encoded quantum state on a chip. The generation unit is particularly important. Here we show the first integrated polarization-entangled photon pair source on a chip. We have impl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.2885","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":"2026-05-18T03:40:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F6iZbeimEdFXzzJYrtqVrOgBSHC0ety8l0GPdvDvaNRKPP/437PFrMMSpGCszO5XL3TxR5R4ODGXeZHdJmvYBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T20:29:36.942032Z"},"content_sha256":"9f96290c4c64e22e85b631ed0d6bd3f3b20508734ba96a9cab450d16d4e7e545","schema_version":"1.0","event_id":"sha256:9f96290c4c64e22e85b631ed0d6bd3f3b20508734ba96a9cab450d16d4e7e545"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M5FC5BMHFIQ7VP2KTN4EA7JMSM/bundle.json","state_url":"https://pith.science/pith/M5FC5BMHFIQ7VP2KTN4EA7JMSM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M5FC5BMHFIQ7VP2KTN4EA7JMSM/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":"2026-06-08T20:29:36Z","links":{"resolver":"https://pith.science/pith/M5FC5BMHFIQ7VP2KTN4EA7JMSM","bundle":"https://pith.science/pith/M5FC5BMHFIQ7VP2KTN4EA7JMSM/bundle.json","state":"https://pith.science/pith/M5FC5BMHFIQ7VP2KTN4EA7JMSM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M5FC5BMHFIQ7VP2KTN4EA7JMSM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:M5FC5BMHFIQ7VP2KTN4EA7JMSM","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":"d711afe4cf98db74d4b2974a0c340c9e48f5e0816cd335d927a9c69d137e63db","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-11-13T04:08:39Z","title_canon_sha256":"796b74e8bdcb2213acba8cb14e8f653406db3edd4a5680c0093bf1b6d6f7eb60"},"schema_version":"1.0","source":{"id":"1211.2885","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.2885","created_at":"2026-05-18T03:40:52Z"},{"alias_kind":"arxiv_version","alias_value":"1211.2885v1","created_at":"2026-05-18T03:40:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.2885","created_at":"2026-05-18T03:40:52Z"},{"alias_kind":"pith_short_12","alias_value":"M5FC5BMHFIQ7","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"M5FC5BMHFIQ7VP2K","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"M5FC5BMH","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:9f96290c4c64e22e85b631ed0d6bd3f3b20508734ba96a9cab450d16d4e7e545","target":"graph","created_at":"2026-05-18T03:40:52Z","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"},"paper":{"abstract_excerpt":"Integrated photonic circuits are one of the most promising platforms for large-scale photonic quantum information systems due to their small physical size and stable interferometers with near-perfect lateral-mode overlaps. Since many quantum information protocols are based on qubits defined by the polarization of photons, we must develop integrated building blocks to generate, manipulate, and measure the polarization-encoded quantum state on a chip. The generation unit is particularly important. Here we show the first integrated polarization-entangled photon pair source on a chip. We have impl","authors_text":"Hanna Le Jeannic, Hiroki Takesue, Hiroshi Fukuda, Kaoru Shimizu, Koji Yamada, Nobuyuki Matsuda, Tai Tsuchizawa, William John Munro, Yasuhiro Tokura","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-11-13T04:08:39Z","title":"A monolithically integrated polarization entangled photon pair source on a silicon chip"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.2885","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:e27cd9813fc455c2d8337da7cf1018a3eebc2c3ff68d46f202c6d7cb9bdf708a","target":"record","created_at":"2026-05-18T03:40:52Z","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":"d711afe4cf98db74d4b2974a0c340c9e48f5e0816cd335d927a9c69d137e63db","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-11-13T04:08:39Z","title_canon_sha256":"796b74e8bdcb2213acba8cb14e8f653406db3edd4a5680c0093bf1b6d6f7eb60"},"schema_version":"1.0","source":{"id":"1211.2885","kind":"arxiv","version":1}},"canonical_sha256":"674a2e85872a21fabf4a9b78407d2c9326887146f8d687dfb2d47b01bce819c6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"674a2e85872a21fabf4a9b78407d2c9326887146f8d687dfb2d47b01bce819c6","first_computed_at":"2026-05-18T03:40:52.443830Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:40:52.443830Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LBZHabBcE6zbmp5YH4h63d6QCwLKM/fj9KvKQw4DlDiflg4cUNetBeXzYa3Dj2ckac+f1i33ph2XAA7M/+x2Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:40:52.444745Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.2885","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e27cd9813fc455c2d8337da7cf1018a3eebc2c3ff68d46f202c6d7cb9bdf708a","sha256:9f96290c4c64e22e85b631ed0d6bd3f3b20508734ba96a9cab450d16d4e7e545"],"state_sha256":"998f862803ffd051d32f22fbcb9ed43e59343bf13a7df9223fb54b7f6dafabac"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K/y58gHzR1pwWHN+Jy+zi7uQTaYrI3Nnedp2VvWjT4jVvkYNipjuISevZx1so9lC+QZ4FO/1g5C6j4WIU28xBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T20:29:36.945775Z","bundle_sha256":"8133d8cc2d5e948925497f4fb3fbac4726eccd469487b80923b29ddba7c2efe9"}}