{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:TXK6FJQNQBSJYYUVMMYYMPOROX","short_pith_number":"pith:TXK6FJQN","canonical_record":{"source":{"id":"1106.5970","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-06-29T15:25:41Z","cross_cats_sorted":[],"title_canon_sha256":"d787394abb5d07cdee1d19c854a01357c5df3655d2ad998f510578c39b0b2b1d","abstract_canon_sha256":"ff7451cb6c2ed980b58d549a7983005e89648990d7e79f3d48ecef4719b88ddf"},"schema_version":"1.0"},"canonical_sha256":"9dd5e2a60d80649c62956331863dd175fec92642a6371399678a44c9094c0179","source":{"kind":"arxiv","id":"1106.5970","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.5970","created_at":"2026-05-18T04:19:04Z"},{"alias_kind":"arxiv_version","alias_value":"1106.5970v1","created_at":"2026-05-18T04:19:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.5970","created_at":"2026-05-18T04:19:04Z"},{"alias_kind":"pith_short_12","alias_value":"TXK6FJQNQBSJ","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"TXK6FJQNQBSJYYUV","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"TXK6FJQN","created_at":"2026-05-18T12:26:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:TXK6FJQNQBSJYYUVMMYYMPOROX","target":"record","payload":{"canonical_record":{"source":{"id":"1106.5970","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-06-29T15:25:41Z","cross_cats_sorted":[],"title_canon_sha256":"d787394abb5d07cdee1d19c854a01357c5df3655d2ad998f510578c39b0b2b1d","abstract_canon_sha256":"ff7451cb6c2ed980b58d549a7983005e89648990d7e79f3d48ecef4719b88ddf"},"schema_version":"1.0"},"canonical_sha256":"9dd5e2a60d80649c62956331863dd175fec92642a6371399678a44c9094c0179","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:19:04.754697Z","signature_b64":"DNYojlSiyzxlPCOwyyK9djNApQ437AN1SubMkDY5dVHocTyaXWBDYNyOsOwJLR0mihtlhYCcVjHIkuUcNoiMBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9dd5e2a60d80649c62956331863dd175fec92642a6371399678a44c9094c0179","last_reissued_at":"2026-05-18T04:19:04.754209Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:19:04.754209Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1106.5970","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":"2026-05-18T04:19:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aJUyI2xRGWJx5l5KnAOdvL1vecQ82BUNFiDFZDoZQnoOic+vaspy3/STYoDG8mT0fwI5HE2CsuTM+FBRgxOTAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T05:39:16.022698Z"},"content_sha256":"46b1af3053e39c62110f71496b2ebfb380ce05ccca0399b9fa434c36fd87b1d6","schema_version":"1.0","event_id":"sha256:46b1af3053e39c62110f71496b2ebfb380ce05ccca0399b9fa434c36fd87b1d6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:TXK6FJQNQBSJYYUVMMYYMPOROX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Generation of modal and path-entangled photons using a domain-engineered integrated optical waveguide device","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Jasleen Lugani, K. Thyagarajan, Sankalpa Ghosh","submitted_at":"2011-06-29T15:25:41Z","abstract_excerpt":"Integrated optical devices are expected to play a promising role in the field of quantum information science and technology. In this paper, we propose a scheme for the generation of nondegenerate, copolarised, modal, and path- entangled photons using a directional coupler and an asymmetric Y-coupler geometry in type 0 phase-matched domain engineered lithium niobate(LN) waveguide. The nonlinearity in LN is tailored in such a way that quasi phase matching conditions for two different spontaneous parametric down conversion processes are obeyed simultaneously, leading to a modal and path-entangled"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.5970","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":"2026-05-18T04:19:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sokd/JtJKIBV7zbBEnjHRq3DGIdxBjBQHavjIpn1pVH3onOFiDbjn+FJeQpGBYEg6mmHtUEdn6Tg08XwcV/0Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T05:39:16.023037Z"},"content_sha256":"74ba992c2474d1b9604f1aa7dcd2ae8c951cc7ad003127c2a18061a0ee981df7","schema_version":"1.0","event_id":"sha256:74ba992c2474d1b9604f1aa7dcd2ae8c951cc7ad003127c2a18061a0ee981df7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TXK6FJQNQBSJYYUVMMYYMPOROX/bundle.json","state_url":"https://pith.science/pith/TXK6FJQNQBSJYYUVMMYYMPOROX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TXK6FJQNQBSJYYUVMMYYMPOROX/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":"2026-06-25T05:39:16Z","links":{"resolver":"https://pith.science/pith/TXK6FJQNQBSJYYUVMMYYMPOROX","bundle":"https://pith.science/pith/TXK6FJQNQBSJYYUVMMYYMPOROX/bundle.json","state":"https://pith.science/pith/TXK6FJQNQBSJYYUVMMYYMPOROX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TXK6FJQNQBSJYYUVMMYYMPOROX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:TXK6FJQNQBSJYYUVMMYYMPOROX","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":"ff7451cb6c2ed980b58d549a7983005e89648990d7e79f3d48ecef4719b88ddf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-06-29T15:25:41Z","title_canon_sha256":"d787394abb5d07cdee1d19c854a01357c5df3655d2ad998f510578c39b0b2b1d"},"schema_version":"1.0","source":{"id":"1106.5970","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.5970","created_at":"2026-05-18T04:19:04Z"},{"alias_kind":"arxiv_version","alias_value":"1106.5970v1","created_at":"2026-05-18T04:19:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.5970","created_at":"2026-05-18T04:19:04Z"},{"alias_kind":"pith_short_12","alias_value":"TXK6FJQNQBSJ","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"TXK6FJQNQBSJYYUV","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"TXK6FJQN","created_at":"2026-05-18T12:26:42Z"}],"graph_snapshots":[{"event_id":"sha256:74ba992c2474d1b9604f1aa7dcd2ae8c951cc7ad003127c2a18061a0ee981df7","target":"graph","created_at":"2026-05-18T04:19:04Z","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 optical devices are expected to play a promising role in the field of quantum information science and technology. In this paper, we propose a scheme for the generation of nondegenerate, copolarised, modal, and path- entangled photons using a directional coupler and an asymmetric Y-coupler geometry in type 0 phase-matched domain engineered lithium niobate(LN) waveguide. The nonlinearity in LN is tailored in such a way that quasi phase matching conditions for two different spontaneous parametric down conversion processes are obeyed simultaneously, leading to a modal and path-entangled","authors_text":"Jasleen Lugani, K. Thyagarajan, Sankalpa Ghosh","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-06-29T15:25:41Z","title":"Generation of modal and path-entangled photons using a domain-engineered integrated optical waveguide device"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.5970","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":"sha256:46b1af3053e39c62110f71496b2ebfb380ce05ccca0399b9fa434c36fd87b1d6","target":"record","created_at":"2026-05-18T04:19:04Z","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":"ff7451cb6c2ed980b58d549a7983005e89648990d7e79f3d48ecef4719b88ddf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-06-29T15:25:41Z","title_canon_sha256":"d787394abb5d07cdee1d19c854a01357c5df3655d2ad998f510578c39b0b2b1d"},"schema_version":"1.0","source":{"id":"1106.5970","kind":"arxiv","version":1}},"canonical_sha256":"9dd5e2a60d80649c62956331863dd175fec92642a6371399678a44c9094c0179","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9dd5e2a60d80649c62956331863dd175fec92642a6371399678a44c9094c0179","first_computed_at":"2026-05-18T04:19:04.754209Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:19:04.754209Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DNYojlSiyzxlPCOwyyK9djNApQ437AN1SubMkDY5dVHocTyaXWBDYNyOsOwJLR0mihtlhYCcVjHIkuUcNoiMBA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:19:04.754697Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.5970","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:46b1af3053e39c62110f71496b2ebfb380ce05ccca0399b9fa434c36fd87b1d6","sha256:74ba992c2474d1b9604f1aa7dcd2ae8c951cc7ad003127c2a18061a0ee981df7"],"state_sha256":"13aba6834e9615e15a4105de633ea7a305faa749a2f1ad1e302d2d872d2aab4b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wr9PZ/JEM71gYoCu9ycanbLFh05Kwgq6zcAopAvBS19q16msqAU22YXqENmWhYyMVudZ5M2bV84ZlwmWx2PbBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T05:39:16.024938Z","bundle_sha256":"312aae8bd70ca5ecc3e30b1614d32ef27f1228878e62573f43f9a0ed1f430e96"}}