{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:G56W6N7NO2KDL7QWLEOPRKZ32L","short_pith_number":"pith:G56W6N7N","canonical_record":{"source":{"id":"2310.01171","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2023-10-02T12:58:50Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"565ebfdc3287220986749be9fa04cff3256a9cf0ae79cf64575e9df4aafa88c4","abstract_canon_sha256":"bddd2c9f11acceb9daaec8dbf92b1fe33cea7ae8f3bccf495662558f6132ae3d"},"schema_version":"1.0"},"canonical_sha256":"377d6f37ed769435fe16591cf8ab3bd2e7f828e6f5cbd3814f1fc3b7e55a9ceb","source":{"kind":"arxiv","id":"2310.01171","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2310.01171","created_at":"2026-07-05T10:00:33Z"},{"alias_kind":"arxiv_version","alias_value":"2310.01171v3","created_at":"2026-07-05T10:00:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2310.01171","created_at":"2026-07-05T10:00:33Z"},{"alias_kind":"pith_short_12","alias_value":"G56W6N7NO2KD","created_at":"2026-07-05T10:00:33Z"},{"alias_kind":"pith_short_16","alias_value":"G56W6N7NO2KDL7QW","created_at":"2026-07-05T10:00:33Z"},{"alias_kind":"pith_short_8","alias_value":"G56W6N7N","created_at":"2026-07-05T10:00:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:G56W6N7NO2KDL7QWLEOPRKZ32L","target":"record","payload":{"canonical_record":{"source":{"id":"2310.01171","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2023-10-02T12:58:50Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"565ebfdc3287220986749be9fa04cff3256a9cf0ae79cf64575e9df4aafa88c4","abstract_canon_sha256":"bddd2c9f11acceb9daaec8dbf92b1fe33cea7ae8f3bccf495662558f6132ae3d"},"schema_version":"1.0"},"canonical_sha256":"377d6f37ed769435fe16591cf8ab3bd2e7f828e6f5cbd3814f1fc3b7e55a9ceb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:00:33.451715Z","signature_b64":"TxlTli7G4eowyvs5F0MQozNhzwtMXH1KQcQIc1vz+bxbgXFzZmqDWAg2xhYl0tsXkAyRI0lB+7ijZLjnejG5BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"377d6f37ed769435fe16591cf8ab3bd2e7f828e6f5cbd3814f1fc3b7e55a9ceb","last_reissued_at":"2026-07-05T10:00:33.451255Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:00:33.451255Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2310.01171","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:00:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6bkuB7B0pYJFr7YM1BsO5BItnLIMQVdnNN6xIHeH/w4EueE/CH2iUGzpgMdEbEi14c1XEGjte25euOOBZwruBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T08:37:17.621871Z"},"content_sha256":"2ae719cf0ab5321982eede85ab2034fa0e2b13267b259720c1dc2fd1d3911afe","schema_version":"1.0","event_id":"sha256:2ae719cf0ab5321982eede85ab2034fa0e2b13267b259720c1dc2fd1d3911afe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:G56W6N7NO2KDL7QWLEOPRKZ32L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Estimation of the FR4 Microwave Dielectric Properties at Cryogenic Temperature for Quantum-Chip-Interface PCBs Design","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"physics.ins-det","authors_text":"Alessandro Paghi, Angelo Greco, Claudio Puglia, Francesco Giazotto, Giacomo Trupiano, Giorgio De Simoni, Hannah Burgaud","submitted_at":"2023-10-02T12:58:50Z","abstract_excerpt":"Ad-hoc interface PCBs (Printed Circuit Boards) are today the standard connection between cryogenic cabling and quantum chips. Besides low-loss and low-temperature-dependent-dielectric-permittivity materials, Flame Resistance n.4 (FR4) provides a low-cost solution for fabrication of cryogenic PCBs. Here, we report on an effective way to evaluate the dielectric performance of a FR4 laminate used as substrate for cryogenic microwave PCBs. We designed a coplanar waveguide {\\lambda}/2 open-circuit series resonator, and we fabricated the PCB using a low-cost manufacturing process, obtaining in-plane"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2310.01171","kind":"arxiv","version":3},"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/2310.01171/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":"2026-07-05T10:00:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LTrGkS9EPCGy4dcPHzOyPySPC3soGaICJZbW7gcdDFOH+MHDacXnNRgvtXxpW2vthvaATkWeWBf6JYf5BT1BBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T08:37:17.622356Z"},"content_sha256":"323eae613a412d97bd0f92c771fd9a2e584855c16237c22fe9275c71acc645eb","schema_version":"1.0","event_id":"sha256:323eae613a412d97bd0f92c771fd9a2e584855c16237c22fe9275c71acc645eb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G56W6N7NO2KDL7QWLEOPRKZ32L/bundle.json","state_url":"https://pith.science/pith/G56W6N7NO2KDL7QWLEOPRKZ32L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G56W6N7NO2KDL7QWLEOPRKZ32L/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":"2026-08-18T08:37:17Z","links":{"resolver":"https://pith.science/pith/G56W6N7NO2KDL7QWLEOPRKZ32L","bundle":"https://pith.science/pith/G56W6N7NO2KDL7QWLEOPRKZ32L/bundle.json","state":"https://pith.science/pith/G56W6N7NO2KDL7QWLEOPRKZ32L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G56W6N7NO2KDL7QWLEOPRKZ32L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:G56W6N7NO2KDL7QWLEOPRKZ32L","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":"bddd2c9f11acceb9daaec8dbf92b1fe33cea7ae8f3bccf495662558f6132ae3d","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2023-10-02T12:58:50Z","title_canon_sha256":"565ebfdc3287220986749be9fa04cff3256a9cf0ae79cf64575e9df4aafa88c4"},"schema_version":"1.0","source":{"id":"2310.01171","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2310.01171","created_at":"2026-07-05T10:00:33Z"},{"alias_kind":"arxiv_version","alias_value":"2310.01171v3","created_at":"2026-07-05T10:00:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2310.01171","created_at":"2026-07-05T10:00:33Z"},{"alias_kind":"pith_short_12","alias_value":"G56W6N7NO2KD","created_at":"2026-07-05T10:00:33Z"},{"alias_kind":"pith_short_16","alias_value":"G56W6N7NO2KDL7QW","created_at":"2026-07-05T10:00:33Z"},{"alias_kind":"pith_short_8","alias_value":"G56W6N7N","created_at":"2026-07-05T10:00:33Z"}],"graph_snapshots":[{"event_id":"sha256:323eae613a412d97bd0f92c771fd9a2e584855c16237c22fe9275c71acc645eb","target":"graph","created_at":"2026-07-05T10:00:33Z","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/2310.01171/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ad-hoc interface PCBs (Printed Circuit Boards) are today the standard connection between cryogenic cabling and quantum chips. Besides low-loss and low-temperature-dependent-dielectric-permittivity materials, Flame Resistance n.4 (FR4) provides a low-cost solution for fabrication of cryogenic PCBs. Here, we report on an effective way to evaluate the dielectric performance of a FR4 laminate used as substrate for cryogenic microwave PCBs. We designed a coplanar waveguide {\\lambda}/2 open-circuit series resonator, and we fabricated the PCB using a low-cost manufacturing process, obtaining in-plane","authors_text":"Alessandro Paghi, Angelo Greco, Claudio Puglia, Francesco Giazotto, Giacomo Trupiano, Giorgio De Simoni, Hannah Burgaud","cross_cats":["physics.app-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2023-10-02T12:58:50Z","title":"Estimation of the FR4 Microwave Dielectric Properties at Cryogenic Temperature for Quantum-Chip-Interface PCBs Design"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2310.01171","kind":"arxiv","version":3},"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":"sha256:2ae719cf0ab5321982eede85ab2034fa0e2b13267b259720c1dc2fd1d3911afe","target":"record","created_at":"2026-07-05T10:00:33Z","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":"bddd2c9f11acceb9daaec8dbf92b1fe33cea7ae8f3bccf495662558f6132ae3d","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2023-10-02T12:58:50Z","title_canon_sha256":"565ebfdc3287220986749be9fa04cff3256a9cf0ae79cf64575e9df4aafa88c4"},"schema_version":"1.0","source":{"id":"2310.01171","kind":"arxiv","version":3}},"canonical_sha256":"377d6f37ed769435fe16591cf8ab3bd2e7f828e6f5cbd3814f1fc3b7e55a9ceb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"377d6f37ed769435fe16591cf8ab3bd2e7f828e6f5cbd3814f1fc3b7e55a9ceb","first_computed_at":"2026-07-05T10:00:33.451255Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:00:33.451255Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TxlTli7G4eowyvs5F0MQozNhzwtMXH1KQcQIc1vz+bxbgXFzZmqDWAg2xhYl0tsXkAyRI0lB+7ijZLjnejG5BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:00:33.451715Z","signed_message":"canonical_sha256_bytes"},"source_id":"2310.01171","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ae719cf0ab5321982eede85ab2034fa0e2b13267b259720c1dc2fd1d3911afe","sha256:323eae613a412d97bd0f92c771fd9a2e584855c16237c22fe9275c71acc645eb"],"state_sha256":"1649793a9cef28c8fe5a934eb59ac756810b830e24d4a83cdee1ccf0ab479da3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XtWM4z1KIyOPddj9azP1IYaEroqnl+EGZV25rN0A2cmz7z8BvAQsHGNXW1V+XsJC4vNZhr2OwNfPNQ+yvLFOBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T08:37:17.625970Z","bundle_sha256":"6efe2e92a6f9952d5c11041bd85f94882a906d3c52d79ee6b98db0e288cfbe21"}}