{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:ZEICLADRBWEAMNEONQIXPGLVB7","short_pith_number":"pith:ZEICLADR","canonical_record":{"source":{"id":"0804.2581","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-04-16T12:08:54Z","cross_cats_sorted":[],"title_canon_sha256":"02530ac95bdfa1f44db7615f90ab6568804ca4f3907c14179486e0eeb3cd5448","abstract_canon_sha256":"b9c54e497d10b4cda4556f6b97c2e77eb79fcf005cc50b0f8a65b236255210fc"},"schema_version":"1.0"},"canonical_sha256":"c9102580710d8806348e6c117799750ffe7cea5f5aceef535289fe96c0499e2c","source":{"kind":"arxiv","id":"0804.2581","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.2581","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"arxiv_version","alias_value":"0804.2581v1","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.2581","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"pith_short_12","alias_value":"ZEICLADRBWEA","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"ZEICLADRBWEAMNEO","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"ZEICLADR","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:ZEICLADRBWEAMNEONQIXPGLVB7","target":"record","payload":{"canonical_record":{"source":{"id":"0804.2581","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-04-16T12:08:54Z","cross_cats_sorted":[],"title_canon_sha256":"02530ac95bdfa1f44db7615f90ab6568804ca4f3907c14179486e0eeb3cd5448","abstract_canon_sha256":"b9c54e497d10b4cda4556f6b97c2e77eb79fcf005cc50b0f8a65b236255210fc"},"schema_version":"1.0"},"canonical_sha256":"c9102580710d8806348e6c117799750ffe7cea5f5aceef535289fe96c0499e2c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:45.119373Z","signature_b64":"g3jU/0MisN/a5oUQcM1yYGPqIOOKleS9Mogtdh9tQj+BoJhmVluV2lFplcwn61mISfIAw92j7Fz017EAAWUBDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c9102580710d8806348e6c117799750ffe7cea5f5aceef535289fe96c0499e2c","last_reissued_at":"2026-05-18T01:08:45.118969Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:45.118969Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0804.2581","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":"2026-05-18T01:08:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JAH+EjupcTzP12fHIiIzlmOLewsHENj9Th5HMnLOBspDcTFxjpHJAeJkmvdYqAxiIhfdypddutsTFnYOwv44Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:56:28.908543Z"},"content_sha256":"a460acbd3572758e97b9f3d88b0d9c2ed126d8e32e256103885f7de4473bfeca","schema_version":"1.0","event_id":"sha256:a460acbd3572758e97b9f3d88b0d9c2ed126d8e32e256103885f7de4473bfeca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:ZEICLADRBWEAMNEONQIXPGLVB7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Enhancement of optical switching parameter and third-order optical nonlinearities in embedded Si nanocrystals: a theoretical assessment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Ceyhun Bulutay, Hasan Y{\\i}ld{\\i}r{\\i}m","submitted_at":"2008-04-16T12:08:54Z","abstract_excerpt":"Third-order bound-charge electronic nonlinearities of Si nanocrystals (NCs) embedded in a wide band-gap matrix representing silica are theoretically studied using an atomistic pseudopotential approach. Nonlinear refractive index, two-photon absorption and optical switching parameter are examined from small clusters to NCs up to a size of 3 nm. Compared to bulk values, Si NCs show higher third-order optical nonlinearities and much wider two-photon absorption threshold which gives rise to enhancement in the optical switching parameter."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.2581","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":"2026-05-18T01:08:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZfDqKAaoJ4EgooLAQmEqx1n1fYymhvg6HUQcNy0bF3cllDznNEhatisqbmorkgDdib2SKCBseU4npVnmlCO8CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:56:28.909225Z"},"content_sha256":"654ea25266bfc2f26cefe5a5ac7b9e048a50c669699452e577da95775d8509d0","schema_version":"1.0","event_id":"sha256:654ea25266bfc2f26cefe5a5ac7b9e048a50c669699452e577da95775d8509d0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZEICLADRBWEAMNEONQIXPGLVB7/bundle.json","state_url":"https://pith.science/pith/ZEICLADRBWEAMNEONQIXPGLVB7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZEICLADRBWEAMNEONQIXPGLVB7/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":"2026-05-25T16:56:28Z","links":{"resolver":"https://pith.science/pith/ZEICLADRBWEAMNEONQIXPGLVB7","bundle":"https://pith.science/pith/ZEICLADRBWEAMNEONQIXPGLVB7/bundle.json","state":"https://pith.science/pith/ZEICLADRBWEAMNEONQIXPGLVB7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZEICLADRBWEAMNEONQIXPGLVB7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:ZEICLADRBWEAMNEONQIXPGLVB7","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":"b9c54e497d10b4cda4556f6b97c2e77eb79fcf005cc50b0f8a65b236255210fc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-04-16T12:08:54Z","title_canon_sha256":"02530ac95bdfa1f44db7615f90ab6568804ca4f3907c14179486e0eeb3cd5448"},"schema_version":"1.0","source":{"id":"0804.2581","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.2581","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"arxiv_version","alias_value":"0804.2581v1","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.2581","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"pith_short_12","alias_value":"ZEICLADRBWEA","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"ZEICLADRBWEAMNEO","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"ZEICLADR","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:654ea25266bfc2f26cefe5a5ac7b9e048a50c669699452e577da95775d8509d0","target":"graph","created_at":"2026-05-18T01:08:45Z","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":"Third-order bound-charge electronic nonlinearities of Si nanocrystals (NCs) embedded in a wide band-gap matrix representing silica are theoretically studied using an atomistic pseudopotential approach. Nonlinear refractive index, two-photon absorption and optical switching parameter are examined from small clusters to NCs up to a size of 3 nm. Compared to bulk values, Si NCs show higher third-order optical nonlinearities and much wider two-photon absorption threshold which gives rise to enhancement in the optical switching parameter.","authors_text":"Ceyhun Bulutay, Hasan Y{\\i}ld{\\i}r{\\i}m","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-04-16T12:08:54Z","title":"Enhancement of optical switching parameter and third-order optical nonlinearities in embedded Si nanocrystals: a theoretical assessment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.2581","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:a460acbd3572758e97b9f3d88b0d9c2ed126d8e32e256103885f7de4473bfeca","target":"record","created_at":"2026-05-18T01:08:45Z","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":"b9c54e497d10b4cda4556f6b97c2e77eb79fcf005cc50b0f8a65b236255210fc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-04-16T12:08:54Z","title_canon_sha256":"02530ac95bdfa1f44db7615f90ab6568804ca4f3907c14179486e0eeb3cd5448"},"schema_version":"1.0","source":{"id":"0804.2581","kind":"arxiv","version":1}},"canonical_sha256":"c9102580710d8806348e6c117799750ffe7cea5f5aceef535289fe96c0499e2c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c9102580710d8806348e6c117799750ffe7cea5f5aceef535289fe96c0499e2c","first_computed_at":"2026-05-18T01:08:45.118969Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:45.118969Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"g3jU/0MisN/a5oUQcM1yYGPqIOOKleS9Mogtdh9tQj+BoJhmVluV2lFplcwn61mISfIAw92j7Fz017EAAWUBDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:45.119373Z","signed_message":"canonical_sha256_bytes"},"source_id":"0804.2581","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a460acbd3572758e97b9f3d88b0d9c2ed126d8e32e256103885f7de4473bfeca","sha256:654ea25266bfc2f26cefe5a5ac7b9e048a50c669699452e577da95775d8509d0"],"state_sha256":"96236c4722fe7cdb2987602d5977b56b466f1a02d9888cfe1a21493097cc811e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hsoYHotJSyiq6xaqMCg4p06K0SU65LLcRGc2Wt0/ESoNvDWR2nNPmugdGSXhKaYvMN194nRvDcQoVyNZfTxmBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T16:56:28.912919Z","bundle_sha256":"b95f81c05b9e906b5ac12eb0439b384897792d4579e47c9302d11b887fdb917f"}}