{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:H62LOBDVEHJGJ5T5JPDDOBNVYO","short_pith_number":"pith:H62LOBDV","canonical_record":{"source":{"id":"2302.02751","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-02-06T12:57:34Z","cross_cats_sorted":[],"title_canon_sha256":"5679cc0f713ac1c81e9f9a2294d17033781cbc3f2da23110a517053cee71278f","abstract_canon_sha256":"8a8dbd7a63d20029fb546dafcc5db0e443f7c5d7d8fceefe7c88db1e229329bb"},"schema_version":"1.0"},"canonical_sha256":"3fb4b7047521d264f67d4bc63705b5c3b51f2d1154f398136c6110b9a1c907a9","source":{"kind":"arxiv","id":"2302.02751","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.02751","created_at":"2026-07-05T05:42:51Z"},{"alias_kind":"arxiv_version","alias_value":"2302.02751v1","created_at":"2026-07-05T05:42:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.02751","created_at":"2026-07-05T05:42:51Z"},{"alias_kind":"pith_short_12","alias_value":"H62LOBDVEHJG","created_at":"2026-07-05T05:42:51Z"},{"alias_kind":"pith_short_16","alias_value":"H62LOBDVEHJGJ5T5","created_at":"2026-07-05T05:42:51Z"},{"alias_kind":"pith_short_8","alias_value":"H62LOBDV","created_at":"2026-07-05T05:42:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:H62LOBDVEHJGJ5T5JPDDOBNVYO","target":"record","payload":{"canonical_record":{"source":{"id":"2302.02751","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-02-06T12:57:34Z","cross_cats_sorted":[],"title_canon_sha256":"5679cc0f713ac1c81e9f9a2294d17033781cbc3f2da23110a517053cee71278f","abstract_canon_sha256":"8a8dbd7a63d20029fb546dafcc5db0e443f7c5d7d8fceefe7c88db1e229329bb"},"schema_version":"1.0"},"canonical_sha256":"3fb4b7047521d264f67d4bc63705b5c3b51f2d1154f398136c6110b9a1c907a9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:42:51.001333Z","signature_b64":"jBewOr6BUu45Z/qXmamftmNYaGbHtepNu0EwiZ+FiUNKoK+fJuJq9nj2HmPjF+Bbkcs/S0TbibRGXFXv4OMqDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3fb4b7047521d264f67d4bc63705b5c3b51f2d1154f398136c6110b9a1c907a9","last_reissued_at":"2026-07-05T05:42:51.000892Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:42:51.000892Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2302.02751","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":"2026-07-05T05:42:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bJBKRt66tkQdHlkRgQMErbGzIHZPYV/x7mzHlIQyBmWys6niqwrOgzve3UeSYCK54XCb5pMu+WeUbEGXqqKhBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T22:26:35.448500Z"},"content_sha256":"a48b585236d0f3c8b7e86be24cd9b0f54c4d2597ff9790f1763df8713373a55a","schema_version":"1.0","event_id":"sha256:a48b585236d0f3c8b7e86be24cd9b0f54c4d2597ff9790f1763df8713373a55a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:H62LOBDVEHJGJ5T5JPDDOBNVYO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low-loss interconnects for modular superconducting quantum processors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Andrew N. Cleland, Changkang Hu, Dapeng Yu, Dian Tan, Fei Yan, Hao Jia, Jian Li, Jiawei Liu, Jiawei Qiu, Jiaxiang Huang, Jingjing Niu, Libo Zhang, Ling Hu, Song Liu, Tongxing Yan, Wanjing Zou, Weiwei Wei, Wenhui Huang, Xiaowei Deng, Xiuhao Deng, Yang Liu, Youpeng Zhong, Yuan Xu, Yuanzhen Chen, Yuxuan Zhou, Ziyu Tao","submitted_at":"2023-02-06T12:57:34Z","abstract_excerpt":"Scaling is now a key challenge in superconducting quantum computing. One solution is to build modular systems in which smaller-scale quantum modules are individually constructed and calibrated, and then assembled into a larger architecture. This, however, requires the development of suitable interconnects. Here, we report low-loss interconnects based on pure aluminium coaxial cables and on-chip impedance transformers featuring quality factors up to $8.1 \\times 10^5$, which is comparable to the performance of our transmon qubits fabricated on single-crystal sapphire substrate. We use these inte"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.02751","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/2302.02751/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":"2026-07-05T05:42:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k4bJatDK12AWlrf6okGpvdGlsf39iO5VlVsbBZ5PJnIcxjQh4HBgNUZDkrFbF2u6KrIZAHcNXMp4YCmJV77OBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T22:26:35.449534Z"},"content_sha256":"1ff4cee0ff213d0642562dfa5301ab9fabf7ee84b7704cd3f20884606912499c","schema_version":"1.0","event_id":"sha256:1ff4cee0ff213d0642562dfa5301ab9fabf7ee84b7704cd3f20884606912499c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/H62LOBDVEHJGJ5T5JPDDOBNVYO/bundle.json","state_url":"https://pith.science/pith/H62LOBDVEHJGJ5T5JPDDOBNVYO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/H62LOBDVEHJGJ5T5JPDDOBNVYO/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":"2026-08-10T22:26:35Z","links":{"resolver":"https://pith.science/pith/H62LOBDVEHJGJ5T5JPDDOBNVYO","bundle":"https://pith.science/pith/H62LOBDVEHJGJ5T5JPDDOBNVYO/bundle.json","state":"https://pith.science/pith/H62LOBDVEHJGJ5T5JPDDOBNVYO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/H62LOBDVEHJGJ5T5JPDDOBNVYO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:H62LOBDVEHJGJ5T5JPDDOBNVYO","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":"8a8dbd7a63d20029fb546dafcc5db0e443f7c5d7d8fceefe7c88db1e229329bb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-02-06T12:57:34Z","title_canon_sha256":"5679cc0f713ac1c81e9f9a2294d17033781cbc3f2da23110a517053cee71278f"},"schema_version":"1.0","source":{"id":"2302.02751","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.02751","created_at":"2026-07-05T05:42:51Z"},{"alias_kind":"arxiv_version","alias_value":"2302.02751v1","created_at":"2026-07-05T05:42:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.02751","created_at":"2026-07-05T05:42:51Z"},{"alias_kind":"pith_short_12","alias_value":"H62LOBDVEHJG","created_at":"2026-07-05T05:42:51Z"},{"alias_kind":"pith_short_16","alias_value":"H62LOBDVEHJGJ5T5","created_at":"2026-07-05T05:42:51Z"},{"alias_kind":"pith_short_8","alias_value":"H62LOBDV","created_at":"2026-07-05T05:42:51Z"}],"graph_snapshots":[{"event_id":"sha256:1ff4cee0ff213d0642562dfa5301ab9fabf7ee84b7704cd3f20884606912499c","target":"graph","created_at":"2026-07-05T05:42:51Z","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/2302.02751/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Scaling is now a key challenge in superconducting quantum computing. One solution is to build modular systems in which smaller-scale quantum modules are individually constructed and calibrated, and then assembled into a larger architecture. This, however, requires the development of suitable interconnects. Here, we report low-loss interconnects based on pure aluminium coaxial cables and on-chip impedance transformers featuring quality factors up to $8.1 \\times 10^5$, which is comparable to the performance of our transmon qubits fabricated on single-crystal sapphire substrate. We use these inte","authors_text":"Andrew N. Cleland, Changkang Hu, Dapeng Yu, Dian Tan, Fei Yan, Hao Jia, Jian Li, Jiawei Liu, Jiawei Qiu, Jiaxiang Huang, Jingjing Niu, Libo Zhang, Ling Hu, Song Liu, Tongxing Yan, Wanjing Zou, Weiwei Wei, Wenhui Huang, Xiaowei Deng, Xiuhao Deng, Yang Liu, Youpeng Zhong, Yuan Xu, Yuanzhen Chen, Yuxuan Zhou, Ziyu Tao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-02-06T12:57:34Z","title":"Low-loss interconnects for modular superconducting quantum processors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.02751","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:a48b585236d0f3c8b7e86be24cd9b0f54c4d2597ff9790f1763df8713373a55a","target":"record","created_at":"2026-07-05T05:42:51Z","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":"8a8dbd7a63d20029fb546dafcc5db0e443f7c5d7d8fceefe7c88db1e229329bb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-02-06T12:57:34Z","title_canon_sha256":"5679cc0f713ac1c81e9f9a2294d17033781cbc3f2da23110a517053cee71278f"},"schema_version":"1.0","source":{"id":"2302.02751","kind":"arxiv","version":1}},"canonical_sha256":"3fb4b7047521d264f67d4bc63705b5c3b51f2d1154f398136c6110b9a1c907a9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3fb4b7047521d264f67d4bc63705b5c3b51f2d1154f398136c6110b9a1c907a9","first_computed_at":"2026-07-05T05:42:51.000892Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:42:51.000892Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jBewOr6BUu45Z/qXmamftmNYaGbHtepNu0EwiZ+FiUNKoK+fJuJq9nj2HmPjF+Bbkcs/S0TbibRGXFXv4OMqDA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:42:51.001333Z","signed_message":"canonical_sha256_bytes"},"source_id":"2302.02751","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a48b585236d0f3c8b7e86be24cd9b0f54c4d2597ff9790f1763df8713373a55a","sha256:1ff4cee0ff213d0642562dfa5301ab9fabf7ee84b7704cd3f20884606912499c"],"state_sha256":"05550fa469bebb0a4cf01fbee641b14c64a84182b0fdbd3855b9b370ac3ab3a7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KRWjNohSYyPDi+ILwCjoiIIJm9SXsWOMfwHve97D+GhoUn6yAL+KSobgiy/ohYVby8IlL67G94DsOXDtP9L2Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T22:26:35.459506Z","bundle_sha256":"5eb9f6cec483ace92242fd039ec577ae7cfc90709d63c89c877fe2ffc7e5d2ae"}}