{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:TVA3U7XKBVTY7ZA6YPKGPMUOD2","short_pith_number":"pith:TVA3U7XK","canonical_record":{"source":{"id":"2305.03419","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-05-05T10:34:32Z","cross_cats_sorted":[],"title_canon_sha256":"e8f8f2ba65143376f90e5e5c0672dd09e578f000e5b1906a7ac585e3a3772da4","abstract_canon_sha256":"3718e2fc2b7a34b5696e91ca507426407e13753fb029ee0ef7ad616ef7fbe39c"},"schema_version":"1.0"},"canonical_sha256":"9d41ba7eea0d678fe41ec3d467b28e1e88742026f2b4e91285ba17e24691a49e","source":{"kind":"arxiv","id":"2305.03419","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2305.03419","created_at":"2026-07-05T07:35:37Z"},{"alias_kind":"arxiv_version","alias_value":"2305.03419v1","created_at":"2026-07-05T07:35:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2305.03419","created_at":"2026-07-05T07:35:37Z"},{"alias_kind":"pith_short_12","alias_value":"TVA3U7XKBVTY","created_at":"2026-07-05T07:35:37Z"},{"alias_kind":"pith_short_16","alias_value":"TVA3U7XKBVTY7ZA6","created_at":"2026-07-05T07:35:37Z"},{"alias_kind":"pith_short_8","alias_value":"TVA3U7XK","created_at":"2026-07-05T07:35:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:TVA3U7XKBVTY7ZA6YPKGPMUOD2","target":"record","payload":{"canonical_record":{"source":{"id":"2305.03419","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-05-05T10:34:32Z","cross_cats_sorted":[],"title_canon_sha256":"e8f8f2ba65143376f90e5e5c0672dd09e578f000e5b1906a7ac585e3a3772da4","abstract_canon_sha256":"3718e2fc2b7a34b5696e91ca507426407e13753fb029ee0ef7ad616ef7fbe39c"},"schema_version":"1.0"},"canonical_sha256":"9d41ba7eea0d678fe41ec3d467b28e1e88742026f2b4e91285ba17e24691a49e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:35:37.306726Z","signature_b64":"0M218LTAkJ/Z4AmduZwScmmuHEEO4hXEaCtxXHM9M0zLgXjk84hmK2eXwZ3SVWhYBEmwZPVJEOvP53wLjUS8Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d41ba7eea0d678fe41ec3d467b28e1e88742026f2b4e91285ba17e24691a49e","last_reissued_at":"2026-07-05T07:35:37.306199Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:35:37.306199Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2305.03419","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":"2026-07-05T07:35:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oHD7+Af+4bGOKICLcN8Qz7yB46vVVwiPJW8XM7qtYAbohm4MysFzDObJOUR7WKM9nJnAZHrd/GZnqR54LOHXBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T15:41:08.986146Z"},"content_sha256":"a9d221aa0400fa6a0b829792061ae5a4cabaab714b45d92ecc33c53c3ca077ae","schema_version":"1.0","event_id":"sha256:a9d221aa0400fa6a0b829792061ae5a4cabaab714b45d92ecc33c53c3ca077ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:TVA3U7XKBVTY7ZA6YPKGPMUOD2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Silicon photonics-integrated time-domain balanced homodyne detector in continuous-variable quantum key distribution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Jun Zou, Shaohua Yu, Shengxiang Zhang, Xiao Hu, Xin Hua, Xi Xiao, Xubo Guo, Xuyang Wang, Yanxiang Jia, Yongmin Li, Yu Zhang","submitted_at":"2023-05-05T10:34:32Z","abstract_excerpt":"We designed and experimentally demonstrated a silicon photonics-integrated time-domain balanced homodyne detector (TBHD), whose optical part has dimensions of 1.5 mm * 0.4 mm. To automatically and accurately balance the detector, new variable optical attenuators were used, and a common mode rejection ratio of 86.9 dB could be achieved. In the quantum tomography experiment, the density matrix and Wigner function of a coherent state were reconstructed with 99.97 % fidelity. The feasibility of this TBHD in a continuous-variable quantum key distribution (CVQKD) system was also demonstrated. This f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2305.03419","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/2305.03419/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":"2026-07-05T07:35:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v35C+/i4Z0LO15S3E+ik/hTQUWNW0pWzlOlltloNhCwDyXyHcc4JjlvUFcigvB5h5RaM1fPmYph/S0BK6/EYCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T15:41:08.986534Z"},"content_sha256":"97eceaaf290c14d86d73e880a4785c16348a5272fb176524f4bc5b893c808f24","schema_version":"1.0","event_id":"sha256:97eceaaf290c14d86d73e880a4785c16348a5272fb176524f4bc5b893c808f24"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TVA3U7XKBVTY7ZA6YPKGPMUOD2/bundle.json","state_url":"https://pith.science/pith/TVA3U7XKBVTY7ZA6YPKGPMUOD2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TVA3U7XKBVTY7ZA6YPKGPMUOD2/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":"2026-07-07T15:41:08Z","links":{"resolver":"https://pith.science/pith/TVA3U7XKBVTY7ZA6YPKGPMUOD2","bundle":"https://pith.science/pith/TVA3U7XKBVTY7ZA6YPKGPMUOD2/bundle.json","state":"https://pith.science/pith/TVA3U7XKBVTY7ZA6YPKGPMUOD2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TVA3U7XKBVTY7ZA6YPKGPMUOD2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:TVA3U7XKBVTY7ZA6YPKGPMUOD2","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":"3718e2fc2b7a34b5696e91ca507426407e13753fb029ee0ef7ad616ef7fbe39c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-05-05T10:34:32Z","title_canon_sha256":"e8f8f2ba65143376f90e5e5c0672dd09e578f000e5b1906a7ac585e3a3772da4"},"schema_version":"1.0","source":{"id":"2305.03419","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2305.03419","created_at":"2026-07-05T07:35:37Z"},{"alias_kind":"arxiv_version","alias_value":"2305.03419v1","created_at":"2026-07-05T07:35:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2305.03419","created_at":"2026-07-05T07:35:37Z"},{"alias_kind":"pith_short_12","alias_value":"TVA3U7XKBVTY","created_at":"2026-07-05T07:35:37Z"},{"alias_kind":"pith_short_16","alias_value":"TVA3U7XKBVTY7ZA6","created_at":"2026-07-05T07:35:37Z"},{"alias_kind":"pith_short_8","alias_value":"TVA3U7XK","created_at":"2026-07-05T07:35:37Z"}],"graph_snapshots":[{"event_id":"sha256:97eceaaf290c14d86d73e880a4785c16348a5272fb176524f4bc5b893c808f24","target":"graph","created_at":"2026-07-05T07:35:37Z","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/2305.03419/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We designed and experimentally demonstrated a silicon photonics-integrated time-domain balanced homodyne detector (TBHD), whose optical part has dimensions of 1.5 mm * 0.4 mm. To automatically and accurately balance the detector, new variable optical attenuators were used, and a common mode rejection ratio of 86.9 dB could be achieved. In the quantum tomography experiment, the density matrix and Wigner function of a coherent state were reconstructed with 99.97 % fidelity. The feasibility of this TBHD in a continuous-variable quantum key distribution (CVQKD) system was also demonstrated. This f","authors_text":"Jun Zou, Shaohua Yu, Shengxiang Zhang, Xiao Hu, Xin Hua, Xi Xiao, Xubo Guo, Xuyang Wang, Yanxiang Jia, Yongmin Li, Yu Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-05-05T10:34:32Z","title":"Silicon photonics-integrated time-domain balanced homodyne detector in continuous-variable quantum key distribution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2305.03419","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:a9d221aa0400fa6a0b829792061ae5a4cabaab714b45d92ecc33c53c3ca077ae","target":"record","created_at":"2026-07-05T07:35:37Z","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":"3718e2fc2b7a34b5696e91ca507426407e13753fb029ee0ef7ad616ef7fbe39c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-05-05T10:34:32Z","title_canon_sha256":"e8f8f2ba65143376f90e5e5c0672dd09e578f000e5b1906a7ac585e3a3772da4"},"schema_version":"1.0","source":{"id":"2305.03419","kind":"arxiv","version":1}},"canonical_sha256":"9d41ba7eea0d678fe41ec3d467b28e1e88742026f2b4e91285ba17e24691a49e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9d41ba7eea0d678fe41ec3d467b28e1e88742026f2b4e91285ba17e24691a49e","first_computed_at":"2026-07-05T07:35:37.306199Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:35:37.306199Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0M218LTAkJ/Z4AmduZwScmmuHEEO4hXEaCtxXHM9M0zLgXjk84hmK2eXwZ3SVWhYBEmwZPVJEOvP53wLjUS8Bg==","signature_status":"signed_v1","signed_at":"2026-07-05T07:35:37.306726Z","signed_message":"canonical_sha256_bytes"},"source_id":"2305.03419","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9d221aa0400fa6a0b829792061ae5a4cabaab714b45d92ecc33c53c3ca077ae","sha256:97eceaaf290c14d86d73e880a4785c16348a5272fb176524f4bc5b893c808f24"],"state_sha256":"daac11058cd0f7f9c70f46221f45328980393e243030d88984f64fccd84f6266"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qh2UzXX9PdMb5+rGaHlc9dYgfaii2aTtLbdGvmh1RjQ7q21NB4mmXdcP6ETMdocFdHgyx4+xy+895Z8SSm1MDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T15:41:08.988522Z","bundle_sha256":"d2659261b7d23d88ebf2fe1b75522eb503d22bda926854c1c9b4e1538f44fdaf"}}