{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:G4QSXMYP2WCCXDZ42DGXZ35ZHC","short_pith_number":"pith:G4QSXMYP","canonical_record":{"source":{"id":"2606.01550","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-06-01T01:50:39Z","cross_cats_sorted":[],"title_canon_sha256":"38b2b8c6ffab55e81d083a3abbbffe7d80d7a6d52a0cd6c1a3ff96751e9ec372","abstract_canon_sha256":"56670bd47625f1fa4baa76435195123d4cd6c192757731a5a9c8c99802835931"},"schema_version":"1.0"},"canonical_sha256":"37212bb30fd5842b8f3cd0cd7cefb93891a91f484192c1940246bce80a77fc9b","source":{"kind":"arxiv","id":"2606.01550","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.01550","created_at":"2026-06-02T02:04:36Z"},{"alias_kind":"arxiv_version","alias_value":"2606.01550v1","created_at":"2026-06-02T02:04:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.01550","created_at":"2026-06-02T02:04:36Z"},{"alias_kind":"pith_short_12","alias_value":"G4QSXMYP2WCC","created_at":"2026-06-02T02:04:36Z"},{"alias_kind":"pith_short_16","alias_value":"G4QSXMYP2WCCXDZ4","created_at":"2026-06-02T02:04:36Z"},{"alias_kind":"pith_short_8","alias_value":"G4QSXMYP","created_at":"2026-06-02T02:04:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:G4QSXMYP2WCCXDZ42DGXZ35ZHC","target":"record","payload":{"canonical_record":{"source":{"id":"2606.01550","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-06-01T01:50:39Z","cross_cats_sorted":[],"title_canon_sha256":"38b2b8c6ffab55e81d083a3abbbffe7d80d7a6d52a0cd6c1a3ff96751e9ec372","abstract_canon_sha256":"56670bd47625f1fa4baa76435195123d4cd6c192757731a5a9c8c99802835931"},"schema_version":"1.0"},"canonical_sha256":"37212bb30fd5842b8f3cd0cd7cefb93891a91f484192c1940246bce80a77fc9b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-02T02:04:36.129264Z","signature_b64":"SFwHF00qV3KLxPsdpSf0FvHiGpN/F0zJCR/wKdNy5lowvK0loSQgIdOHDwg15DL+8Xhqd7le3xFYK5bCCdqrAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"37212bb30fd5842b8f3cd0cd7cefb93891a91f484192c1940246bce80a77fc9b","last_reissued_at":"2026-06-02T02:04:36.128864Z","signature_status":"signed_v1","first_computed_at":"2026-06-02T02:04:36.128864Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.01550","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":"2026-06-02T02:04:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9ixui5ayvIyfhpeJrpM+y4vwGlND9AYeZH3ddFle8v3Pdnqi84sRd+p5jrPWTtFWQaGs0A8nOvYuDE/8Bzr0Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T02:47:05.278372Z"},"content_sha256":"85f35106742c8801f2778b90211cb2797392320f92c082325773c573e6f67f04","schema_version":"1.0","event_id":"sha256:85f35106742c8801f2778b90211cb2797392320f92c082325773c573e6f67f04"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:G4QSXMYP2WCCXDZ42DGXZ35ZHC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Single-Photon Infrared Imaging with a Silicon Camera Based on Long-Wavelength-Pumping Two-Photon Absorption","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"E Wu, Heping Zeng, Jianan Fang, Kun Huang, Ming Yan, Yinqi Wang","submitted_at":"2026-06-01T01:50:39Z","abstract_excerpt":"We experimentally demonstrated an ultra-sensitive imaging system for telecom photons based on the non-degenerate two-photon absorption in a silicon-based electron multiplying charge-coupled device (EMCCD). The proposed long-wavelength-pumping scheme with mid-infrared pulsed excitation could not only effectively increase the two-photon absorption coefficient, but also significantly suppress the background noise caused by the harmonic absorption of the strong pumping field. In comparison to the photoelectric response via the degenerate two-photon absorption, the implemented configuration could o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.01550","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.01550/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":"2026-06-02T02:04:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2QY/sI3yJgx3vb6EoZEk0LAPxMMPownq5fNmY1BbZj94+l8hksyj/TPvNQyPSgQLp28h+aOvuo8HvNA3mDwpCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T02:47:05.278815Z"},"content_sha256":"6701c7d504beebcea3b0c1aca525bd144c83f33b662fb85a343e009111939733","schema_version":"1.0","event_id":"sha256:6701c7d504beebcea3b0c1aca525bd144c83f33b662fb85a343e009111939733"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G4QSXMYP2WCCXDZ42DGXZ35ZHC/bundle.json","state_url":"https://pith.science/pith/G4QSXMYP2WCCXDZ42DGXZ35ZHC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G4QSXMYP2WCCXDZ42DGXZ35ZHC/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":"2026-06-04T02:47:05Z","links":{"resolver":"https://pith.science/pith/G4QSXMYP2WCCXDZ42DGXZ35ZHC","bundle":"https://pith.science/pith/G4QSXMYP2WCCXDZ42DGXZ35ZHC/bundle.json","state":"https://pith.science/pith/G4QSXMYP2WCCXDZ42DGXZ35ZHC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G4QSXMYP2WCCXDZ42DGXZ35ZHC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:G4QSXMYP2WCCXDZ42DGXZ35ZHC","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":"56670bd47625f1fa4baa76435195123d4cd6c192757731a5a9c8c99802835931","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-06-01T01:50:39Z","title_canon_sha256":"38b2b8c6ffab55e81d083a3abbbffe7d80d7a6d52a0cd6c1a3ff96751e9ec372"},"schema_version":"1.0","source":{"id":"2606.01550","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.01550","created_at":"2026-06-02T02:04:36Z"},{"alias_kind":"arxiv_version","alias_value":"2606.01550v1","created_at":"2026-06-02T02:04:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.01550","created_at":"2026-06-02T02:04:36Z"},{"alias_kind":"pith_short_12","alias_value":"G4QSXMYP2WCC","created_at":"2026-06-02T02:04:36Z"},{"alias_kind":"pith_short_16","alias_value":"G4QSXMYP2WCCXDZ4","created_at":"2026-06-02T02:04:36Z"},{"alias_kind":"pith_short_8","alias_value":"G4QSXMYP","created_at":"2026-06-02T02:04:36Z"}],"graph_snapshots":[{"event_id":"sha256:6701c7d504beebcea3b0c1aca525bd144c83f33b662fb85a343e009111939733","target":"graph","created_at":"2026-06-02T02:04:36Z","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/2606.01550/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We experimentally demonstrated an ultra-sensitive imaging system for telecom photons based on the non-degenerate two-photon absorption in a silicon-based electron multiplying charge-coupled device (EMCCD). The proposed long-wavelength-pumping scheme with mid-infrared pulsed excitation could not only effectively increase the two-photon absorption coefficient, but also significantly suppress the background noise caused by the harmonic absorption of the strong pumping field. In comparison to the photoelectric response via the degenerate two-photon absorption, the implemented configuration could o","authors_text":"E Wu, Heping Zeng, Jianan Fang, Kun Huang, Ming Yan, Yinqi Wang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-06-01T01:50:39Z","title":"Single-Photon Infrared Imaging with a Silicon Camera Based on Long-Wavelength-Pumping Two-Photon Absorption"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.01550","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":"sha256:85f35106742c8801f2778b90211cb2797392320f92c082325773c573e6f67f04","target":"record","created_at":"2026-06-02T02:04:36Z","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":"56670bd47625f1fa4baa76435195123d4cd6c192757731a5a9c8c99802835931","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-06-01T01:50:39Z","title_canon_sha256":"38b2b8c6ffab55e81d083a3abbbffe7d80d7a6d52a0cd6c1a3ff96751e9ec372"},"schema_version":"1.0","source":{"id":"2606.01550","kind":"arxiv","version":1}},"canonical_sha256":"37212bb30fd5842b8f3cd0cd7cefb93891a91f484192c1940246bce80a77fc9b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"37212bb30fd5842b8f3cd0cd7cefb93891a91f484192c1940246bce80a77fc9b","first_computed_at":"2026-06-02T02:04:36.128864Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-02T02:04:36.128864Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SFwHF00qV3KLxPsdpSf0FvHiGpN/F0zJCR/wKdNy5lowvK0loSQgIdOHDwg15DL+8Xhqd7le3xFYK5bCCdqrAQ==","signature_status":"signed_v1","signed_at":"2026-06-02T02:04:36.129264Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.01550","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:85f35106742c8801f2778b90211cb2797392320f92c082325773c573e6f67f04","sha256:6701c7d504beebcea3b0c1aca525bd144c83f33b662fb85a343e009111939733"],"state_sha256":"e6481ff4c428f9c03556cda392f13f9ab951e7dd632c2671e65f0e8611ff0cc3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o+vVFWxkdMKwdzKaS/Vw30BRSDk48Lh4fHGIktcUu2cR/rP28VFPhsXFIfIaCb6nIdYOJ5ujCxG/6nKA3C4fAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T02:47:05.281134Z","bundle_sha256":"153239729fc17534a3481a778d5510fc011f0493cab23e884b0906442a6e2450"}}