{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:RYQUG25VTTRCBGWB2377TIJRX6","short_pith_number":"pith:RYQUG25V","canonical_record":{"source":{"id":"1011.4003","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-11-17T17:24:20Z","cross_cats_sorted":[],"title_canon_sha256":"716534fcabc9b315feac373b6290cbe16a16d9e00319ecb0258876327f512e92","abstract_canon_sha256":"e7722851019bae2c0fe994b761de0650839b2edaa4a35a329bc3b95ea430e091"},"schema_version":"1.0"},"canonical_sha256":"8e21436bb59ce2209ac1d6fff9a131bf9e51194d82479652404178bc725873d0","source":{"kind":"arxiv","id":"1011.4003","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1011.4003","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"arxiv_version","alias_value":"1011.4003v1","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1011.4003","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"pith_short_12","alias_value":"RYQUG25VTTRC","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"RYQUG25VTTRCBGWB","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"RYQUG25V","created_at":"2026-05-18T12:26:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:RYQUG25VTTRCBGWB2377TIJRX6","target":"record","payload":{"canonical_record":{"source":{"id":"1011.4003","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-11-17T17:24:20Z","cross_cats_sorted":[],"title_canon_sha256":"716534fcabc9b315feac373b6290cbe16a16d9e00319ecb0258876327f512e92","abstract_canon_sha256":"e7722851019bae2c0fe994b761de0650839b2edaa4a35a329bc3b95ea430e091"},"schema_version":"1.0"},"canonical_sha256":"8e21436bb59ce2209ac1d6fff9a131bf9e51194d82479652404178bc725873d0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:08:12.616301Z","signature_b64":"pWpFCCtFHhBejRpTNr3Fv9rSoLWrl/xsI9Go2RSLXTWD2GhzPvm9X8Jcp3h3Kk85bak24jq+hySAR1+beX+BAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8e21436bb59ce2209ac1d6fff9a131bf9e51194d82479652404178bc725873d0","last_reissued_at":"2026-05-18T04:08:12.615765Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:08:12.615765Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1011.4003","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":"2026-05-18T04:08:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rLKUnFfW9qAr1fZO8RfkfK0841QnyA8xggtY5RetclFBbvW4g/QMABPGb+V2+RZtNIpnrJlk7cfdxZ0ueQ0tAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T21:07:20.082212Z"},"content_sha256":"0a08271a036e87f01e456a5a1d3a60301f9950ea59ae14a0be58c5bac96a34b9","schema_version":"1.0","event_id":"sha256:0a08271a036e87f01e456a5a1d3a60301f9950ea59ae14a0be58c5bac96a34b9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:RYQUG25VTTRCBGWB2377TIJRX6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Generation of paired photons in a quantum separable state in Bragg reflection waveguides","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Amr S. Helmy, Ji\\v{r}\\'i Svozil\\'ik, Juan P. Torres, Martin Hendrych","submitted_at":"2010-11-17T17:24:20Z","abstract_excerpt":"This work proposes and analyses a novel approach for the generation of separable (quantum uncorrelated) photon pairs based on spontaneous parametric down-conversion in Bragg reflection waveguides composed of semiconductor AlGaN layers. This platform allows the removal of any spectral correlation between paired photons that propagate in different spatial modes. The photons can be designed to show equal or different spectra by tuning the structural parameters and hence the dispersion of the waveguide."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.4003","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":"2026-05-18T04:08:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vxBKmd12NlR3ZV2oKrEhWtU9y0MbePs6RWeJx6kCCqkQwP2MW1XWHwSzr/4o/FrxvQe33ii4d2sbfKCliRKpBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T21:07:20.082954Z"},"content_sha256":"299093bb638d460eb25e17b74f19f848c153249edd939ee1bbdf9fd4c038d89d","schema_version":"1.0","event_id":"sha256:299093bb638d460eb25e17b74f19f848c153249edd939ee1bbdf9fd4c038d89d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RYQUG25VTTRCBGWB2377TIJRX6/bundle.json","state_url":"https://pith.science/pith/RYQUG25VTTRCBGWB2377TIJRX6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RYQUG25VTTRCBGWB2377TIJRX6/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":"2026-05-31T21:07:20Z","links":{"resolver":"https://pith.science/pith/RYQUG25VTTRCBGWB2377TIJRX6","bundle":"https://pith.science/pith/RYQUG25VTTRCBGWB2377TIJRX6/bundle.json","state":"https://pith.science/pith/RYQUG25VTTRCBGWB2377TIJRX6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RYQUG25VTTRCBGWB2377TIJRX6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:RYQUG25VTTRCBGWB2377TIJRX6","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":"e7722851019bae2c0fe994b761de0650839b2edaa4a35a329bc3b95ea430e091","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-11-17T17:24:20Z","title_canon_sha256":"716534fcabc9b315feac373b6290cbe16a16d9e00319ecb0258876327f512e92"},"schema_version":"1.0","source":{"id":"1011.4003","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1011.4003","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"arxiv_version","alias_value":"1011.4003v1","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1011.4003","created_at":"2026-05-18T04:08:12Z"},{"alias_kind":"pith_short_12","alias_value":"RYQUG25VTTRC","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"RYQUG25VTTRCBGWB","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"RYQUG25V","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:299093bb638d460eb25e17b74f19f848c153249edd939ee1bbdf9fd4c038d89d","target":"graph","created_at":"2026-05-18T04:08:12Z","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":"This work proposes and analyses a novel approach for the generation of separable (quantum uncorrelated) photon pairs based on spontaneous parametric down-conversion in Bragg reflection waveguides composed of semiconductor AlGaN layers. This platform allows the removal of any spectral correlation between paired photons that propagate in different spatial modes. The photons can be designed to show equal or different spectra by tuning the structural parameters and hence the dispersion of the waveguide.","authors_text":"Amr S. Helmy, Ji\\v{r}\\'i Svozil\\'ik, Juan P. Torres, Martin Hendrych","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-11-17T17:24:20Z","title":"Generation of paired photons in a quantum separable state in Bragg reflection waveguides"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.4003","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":"sha256:0a08271a036e87f01e456a5a1d3a60301f9950ea59ae14a0be58c5bac96a34b9","target":"record","created_at":"2026-05-18T04:08:12Z","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":"e7722851019bae2c0fe994b761de0650839b2edaa4a35a329bc3b95ea430e091","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-11-17T17:24:20Z","title_canon_sha256":"716534fcabc9b315feac373b6290cbe16a16d9e00319ecb0258876327f512e92"},"schema_version":"1.0","source":{"id":"1011.4003","kind":"arxiv","version":1}},"canonical_sha256":"8e21436bb59ce2209ac1d6fff9a131bf9e51194d82479652404178bc725873d0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8e21436bb59ce2209ac1d6fff9a131bf9e51194d82479652404178bc725873d0","first_computed_at":"2026-05-18T04:08:12.615765Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:08:12.615765Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pWpFCCtFHhBejRpTNr3Fv9rSoLWrl/xsI9Go2RSLXTWD2GhzPvm9X8Jcp3h3Kk85bak24jq+hySAR1+beX+BAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:08:12.616301Z","signed_message":"canonical_sha256_bytes"},"source_id":"1011.4003","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0a08271a036e87f01e456a5a1d3a60301f9950ea59ae14a0be58c5bac96a34b9","sha256:299093bb638d460eb25e17b74f19f848c153249edd939ee1bbdf9fd4c038d89d"],"state_sha256":"4f6500c79ca8d3d7e0d3e244dabd5621151f8b523042e7e5d42fcecbb98ba0d6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QnVyPpMa5hkPPoX2ylCXsAUxnfRn6Xb3kBxHWvurnRcfGipcJqM4pS4fEEOUgxeMbs53LpiUBFxcPgTwJlXjAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T21:07:20.087830Z","bundle_sha256":"cc4cd96de9d6e046d259728806872a49d34f207123b328f6d7e042c6a22c0798"}}