{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:MCF6YFONPUVNGSYPMGICKTYMAW","short_pith_number":"pith:MCF6YFON","canonical_record":{"source":{"id":"2510.24439","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"quant-ph","submitted_at":"2025-10-28T14:06:22Z","cross_cats_sorted":[],"title_canon_sha256":"f26fd8391b554abf54fd96b52319c1c1d3458fe1ac15d033cf0351be9d5896ca","abstract_canon_sha256":"08351fb0cd7a4a5f33056adf178ff35f3cdbbb5202b0e8c80c496c18c82a300e"},"schema_version":"1.0"},"canonical_sha256":"608bec15cd7d2ad34b0f6190254f0c0585162995bd5dffa1d39db3463ae3fec5","source":{"kind":"arxiv","id":"2510.24439","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2510.24439","created_at":"2026-06-01T01:02:24Z"},{"alias_kind":"arxiv_version","alias_value":"2510.24439v2","created_at":"2026-06-01T01:02:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2510.24439","created_at":"2026-06-01T01:02:24Z"},{"alias_kind":"pith_short_12","alias_value":"MCF6YFONPUVN","created_at":"2026-06-01T01:02:24Z"},{"alias_kind":"pith_short_16","alias_value":"MCF6YFONPUVNGSYP","created_at":"2026-06-01T01:02:24Z"},{"alias_kind":"pith_short_8","alias_value":"MCF6YFON","created_at":"2026-06-01T01:02:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:MCF6YFONPUVNGSYPMGICKTYMAW","target":"record","payload":{"canonical_record":{"source":{"id":"2510.24439","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"quant-ph","submitted_at":"2025-10-28T14:06:22Z","cross_cats_sorted":[],"title_canon_sha256":"f26fd8391b554abf54fd96b52319c1c1d3458fe1ac15d033cf0351be9d5896ca","abstract_canon_sha256":"08351fb0cd7a4a5f33056adf178ff35f3cdbbb5202b0e8c80c496c18c82a300e"},"schema_version":"1.0"},"canonical_sha256":"608bec15cd7d2ad34b0f6190254f0c0585162995bd5dffa1d39db3463ae3fec5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-01T01:02:24.577564Z","signature_b64":"IZ6t90LkWPbf85jRmtypQkKHdVoMqwa61hvITbdUoQyWG5tJHccJWTO8v2MXAbGFs1by0bHhbt15g+WSYTPlAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"608bec15cd7d2ad34b0f6190254f0c0585162995bd5dffa1d39db3463ae3fec5","last_reissued_at":"2026-06-01T01:02:24.576623Z","signature_status":"signed_v1","first_computed_at":"2026-06-01T01:02:24.576623Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2510.24439","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-01T01:02:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1BhL7OoIEzMgsNFc/QF7eCzLGRhEJdADzi92OXYjjAPZyCq1p7Pqa8Sp6d3zmDLLUHYffNMb21rzieQjxc5XBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T17:22:44.926886Z"},"content_sha256":"5267b85109e139f7392171c8fb5183c77b8c415a4bd50cb76187d1467da3ffb4","schema_version":"1.0","event_id":"sha256:5267b85109e139f7392171c8fb5183c77b8c415a4bd50cb76187d1467da3ffb4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:MCF6YFONPUVNGSYPMGICKTYMAW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fundamental limit on the heralded single photons' spectral brightness","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Ite A. Yu, Pei-Yu Tu, Tse-Yu Lin, Wei-Kai Huang, Yong-Fan Chen","submitted_at":"2025-10-28T14:06:22Z","abstract_excerpt":"Heralded single photons (HSPs) are the versatile flying qubits in quantum communication and networks due to their ability to remove the randomness of arrival time and enhance the transmission reliability. As the generation rate of HSPs increases or their linewidth narrows, both of which are desirable for quantum information processing, the fundamental limit of spectral brightness (SB), defined as the generation rate per unit linewidth, remains unclear. To examine the existence and value of such a limit, we systematically studied the SB together with the cross-correlation function, or equivalen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2510.24439","kind":"arxiv","version":2},"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/2510.24439/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":"2026-06-01T01:02:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bf4lstwU1hj8H2HKIG+c4Mkba3GqDyi9tTTREaHr+FbNT60xlYJir4NF6QmjbPtvY40TiWwtwHyLr+sNvcFyAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T17:22:44.927557Z"},"content_sha256":"0b976defa88c85ef050f9518967a2a5f65c2e79482363bf8f107321ab265b2ea","schema_version":"1.0","event_id":"sha256:0b976defa88c85ef050f9518967a2a5f65c2e79482363bf8f107321ab265b2ea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MCF6YFONPUVNGSYPMGICKTYMAW/bundle.json","state_url":"https://pith.science/pith/MCF6YFONPUVNGSYPMGICKTYMAW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MCF6YFONPUVNGSYPMGICKTYMAW/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":"2026-06-07T17:22:44Z","links":{"resolver":"https://pith.science/pith/MCF6YFONPUVNGSYPMGICKTYMAW","bundle":"https://pith.science/pith/MCF6YFONPUVNGSYPMGICKTYMAW/bundle.json","state":"https://pith.science/pith/MCF6YFONPUVNGSYPMGICKTYMAW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MCF6YFONPUVNGSYPMGICKTYMAW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:MCF6YFONPUVNGSYPMGICKTYMAW","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":"08351fb0cd7a4a5f33056adf178ff35f3cdbbb5202b0e8c80c496c18c82a300e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"quant-ph","submitted_at":"2025-10-28T14:06:22Z","title_canon_sha256":"f26fd8391b554abf54fd96b52319c1c1d3458fe1ac15d033cf0351be9d5896ca"},"schema_version":"1.0","source":{"id":"2510.24439","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2510.24439","created_at":"2026-06-01T01:02:24Z"},{"alias_kind":"arxiv_version","alias_value":"2510.24439v2","created_at":"2026-06-01T01:02:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2510.24439","created_at":"2026-06-01T01:02:24Z"},{"alias_kind":"pith_short_12","alias_value":"MCF6YFONPUVN","created_at":"2026-06-01T01:02:24Z"},{"alias_kind":"pith_short_16","alias_value":"MCF6YFONPUVNGSYP","created_at":"2026-06-01T01:02:24Z"},{"alias_kind":"pith_short_8","alias_value":"MCF6YFON","created_at":"2026-06-01T01:02:24Z"}],"graph_snapshots":[{"event_id":"sha256:0b976defa88c85ef050f9518967a2a5f65c2e79482363bf8f107321ab265b2ea","target":"graph","created_at":"2026-06-01T01:02:24Z","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/2510.24439/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Heralded single photons (HSPs) are the versatile flying qubits in quantum communication and networks due to their ability to remove the randomness of arrival time and enhance the transmission reliability. As the generation rate of HSPs increases or their linewidth narrows, both of which are desirable for quantum information processing, the fundamental limit of spectral brightness (SB), defined as the generation rate per unit linewidth, remains unclear. To examine the existence and value of such a limit, we systematically studied the SB together with the cross-correlation function, or equivalen","authors_text":"Ite A. Yu, Pei-Yu Tu, Tse-Yu Lin, Wei-Kai Huang, Yong-Fan Chen","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"quant-ph","submitted_at":"2025-10-28T14:06:22Z","title":"Fundamental limit on the heralded single photons' spectral brightness"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2510.24439","kind":"arxiv","version":2},"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":"sha256:5267b85109e139f7392171c8fb5183c77b8c415a4bd50cb76187d1467da3ffb4","target":"record","created_at":"2026-06-01T01:02:24Z","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":"08351fb0cd7a4a5f33056adf178ff35f3cdbbb5202b0e8c80c496c18c82a300e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"quant-ph","submitted_at":"2025-10-28T14:06:22Z","title_canon_sha256":"f26fd8391b554abf54fd96b52319c1c1d3458fe1ac15d033cf0351be9d5896ca"},"schema_version":"1.0","source":{"id":"2510.24439","kind":"arxiv","version":2}},"canonical_sha256":"608bec15cd7d2ad34b0f6190254f0c0585162995bd5dffa1d39db3463ae3fec5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"608bec15cd7d2ad34b0f6190254f0c0585162995bd5dffa1d39db3463ae3fec5","first_computed_at":"2026-06-01T01:02:24.576623Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-01T01:02:24.576623Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IZ6t90LkWPbf85jRmtypQkKHdVoMqwa61hvITbdUoQyWG5tJHccJWTO8v2MXAbGFs1by0bHhbt15g+WSYTPlAA==","signature_status":"signed_v1","signed_at":"2026-06-01T01:02:24.577564Z","signed_message":"canonical_sha256_bytes"},"source_id":"2510.24439","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5267b85109e139f7392171c8fb5183c77b8c415a4bd50cb76187d1467da3ffb4","sha256:0b976defa88c85ef050f9518967a2a5f65c2e79482363bf8f107321ab265b2ea"],"state_sha256":"71e8b6eb30febc9549b3be020f213489b053ffe895f4436c45c8991fe7314dc9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1v2/QmFAyl2AoxwQDM7NwnQCtzoIJsgZOi4vrtuJEyqXvRHpYtQVfZhUAozgQArJk3q9xgBSBFeJfMcMPRZdDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T17:22:44.931177Z","bundle_sha256":"efe36c5b1e7ae33276aefe8b72bda572f12555cda1cdaefbe861bb7990e702d6"}}