{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:U5A2PB7K2H4EN7QK4RTBCDTKPN","short_pith_number":"pith:U5A2PB7K","canonical_record":{"source":{"id":"2509.07669","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-09-09T12:36:34Z","cross_cats_sorted":["cond-mat.supr-con","cs.ET","cs.SY","eess.SY","physics.app-ph"],"title_canon_sha256":"d4f4d7c5dedcc2ee97af87a460ff9ea183f860cda81c0acac8c50c4a130d6be9","abstract_canon_sha256":"f0352d53769216df3167c95d6758ea6c9989931d29e25946363994b63c40aa46"},"schema_version":"1.0"},"canonical_sha256":"a741a787ead1f846fe0ae466110e6a7b709216498dc06d47322a9f85c7a09a78","source":{"kind":"arxiv","id":"2509.07669","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.07669","created_at":"2026-07-05T12:07:26Z"},{"alias_kind":"arxiv_version","alias_value":"2509.07669v1","created_at":"2026-07-05T12:07:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.07669","created_at":"2026-07-05T12:07:26Z"},{"alias_kind":"pith_short_12","alias_value":"U5A2PB7K2H4E","created_at":"2026-07-05T12:07:26Z"},{"alias_kind":"pith_short_16","alias_value":"U5A2PB7K2H4EN7QK","created_at":"2026-07-05T12:07:26Z"},{"alias_kind":"pith_short_8","alias_value":"U5A2PB7K","created_at":"2026-07-05T12:07:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:U5A2PB7K2H4EN7QK4RTBCDTKPN","target":"record","payload":{"canonical_record":{"source":{"id":"2509.07669","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-09-09T12:36:34Z","cross_cats_sorted":["cond-mat.supr-con","cs.ET","cs.SY","eess.SY","physics.app-ph"],"title_canon_sha256":"d4f4d7c5dedcc2ee97af87a460ff9ea183f860cda81c0acac8c50c4a130d6be9","abstract_canon_sha256":"f0352d53769216df3167c95d6758ea6c9989931d29e25946363994b63c40aa46"},"schema_version":"1.0"},"canonical_sha256":"a741a787ead1f846fe0ae466110e6a7b709216498dc06d47322a9f85c7a09a78","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:07:26.029174Z","signature_b64":"yqV39FWnCbJ4K6U0bw2NykaEMgyorPvU0kkbj1VxY41aC09jWJ1gOnzZQF04VbCBlcLWYnANFw6TKiwprDW3Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a741a787ead1f846fe0ae466110e6a7b709216498dc06d47322a9f85c7a09a78","last_reissued_at":"2026-07-05T12:07:26.028690Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:07:26.028690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2509.07669","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":"2026-07-05T12:07:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0mEf6suHLsstYh5ZU6d2MDRzQbDPoEjSiRwLGbhNqzYzk9EnUiOsVlQ1nOvsaIJIWyrbiW3EoisrZ5IN4bJxAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T08:06:32.703951Z"},"content_sha256":"b2caa3456703c8cc49f300b7a6580f51e5497f00c5fc13f5055281a62d9b5776","schema_version":"1.0","event_id":"sha256:b2caa3456703c8cc49f300b7a6580f51e5497f00c5fc13f5055281a62d9b5776"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:U5A2PB7K2H4EN7QK4RTBCDTKPN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On-chip microwave sensing of quasiparticles in tantalum superconducting circuits on silicon for scalable quantum technologies","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.supr-con","cs.ET","cs.SY","eess.SY","physics.app-ph"],"primary_cat":"quant-ph","authors_text":"Kaveh Delfanazari, Martin Weides, Mingqi Zhang, Paniz Foshat, Shima Poorgholam-Khanjari, Valentino Seferai","submitted_at":"2025-09-09T12:36:34Z","abstract_excerpt":"The performance and scalability of superconducting quantum circuits are fundamentally constrained by non-equilibrium quasiparticles, which induce microwave losses that limit resonator quality factors and qubit coherence times. Understanding and mitigating these excitations is therefore central to advancing scalable quantum technologies. Here, we demonstrate on-chip microwave sensing of quasiparticles in high-Q {\\alpha}-tantalum coplanar waveguide resonators on silicon, operated in the single-photon regime. Temperature-dependent measurements reveal persistent non-equilibrium quasiparticles at m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.07669","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/2509.07669/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":"2026-07-05T12:07:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RRZUbLjFD6vvokRffhw8bXJQb6Bv58ZQVpIR8ywALtNsRqaYbiYvNHlZd3d4etvxG1RSF0BpDx/f9x59mK22AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T08:06:32.704475Z"},"content_sha256":"fc33d55ebc393b68faa1f7ebe612de59198967691d94d65c4f59eb0eb27d0edb","schema_version":"1.0","event_id":"sha256:fc33d55ebc393b68faa1f7ebe612de59198967691d94d65c4f59eb0eb27d0edb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U5A2PB7K2H4EN7QK4RTBCDTKPN/bundle.json","state_url":"https://pith.science/pith/U5A2PB7K2H4EN7QK4RTBCDTKPN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U5A2PB7K2H4EN7QK4RTBCDTKPN/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":"2026-08-16T08:06:32Z","links":{"resolver":"https://pith.science/pith/U5A2PB7K2H4EN7QK4RTBCDTKPN","bundle":"https://pith.science/pith/U5A2PB7K2H4EN7QK4RTBCDTKPN/bundle.json","state":"https://pith.science/pith/U5A2PB7K2H4EN7QK4RTBCDTKPN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U5A2PB7K2H4EN7QK4RTBCDTKPN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:U5A2PB7K2H4EN7QK4RTBCDTKPN","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":"f0352d53769216df3167c95d6758ea6c9989931d29e25946363994b63c40aa46","cross_cats_sorted":["cond-mat.supr-con","cs.ET","cs.SY","eess.SY","physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-09-09T12:36:34Z","title_canon_sha256":"d4f4d7c5dedcc2ee97af87a460ff9ea183f860cda81c0acac8c50c4a130d6be9"},"schema_version":"1.0","source":{"id":"2509.07669","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.07669","created_at":"2026-07-05T12:07:26Z"},{"alias_kind":"arxiv_version","alias_value":"2509.07669v1","created_at":"2026-07-05T12:07:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.07669","created_at":"2026-07-05T12:07:26Z"},{"alias_kind":"pith_short_12","alias_value":"U5A2PB7K2H4E","created_at":"2026-07-05T12:07:26Z"},{"alias_kind":"pith_short_16","alias_value":"U5A2PB7K2H4EN7QK","created_at":"2026-07-05T12:07:26Z"},{"alias_kind":"pith_short_8","alias_value":"U5A2PB7K","created_at":"2026-07-05T12:07:26Z"}],"graph_snapshots":[{"event_id":"sha256:fc33d55ebc393b68faa1f7ebe612de59198967691d94d65c4f59eb0eb27d0edb","target":"graph","created_at":"2026-07-05T12:07:26Z","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/2509.07669/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The performance and scalability of superconducting quantum circuits are fundamentally constrained by non-equilibrium quasiparticles, which induce microwave losses that limit resonator quality factors and qubit coherence times. Understanding and mitigating these excitations is therefore central to advancing scalable quantum technologies. Here, we demonstrate on-chip microwave sensing of quasiparticles in high-Q {\\alpha}-tantalum coplanar waveguide resonators on silicon, operated in the single-photon regime. Temperature-dependent measurements reveal persistent non-equilibrium quasiparticles at m","authors_text":"Kaveh Delfanazari, Martin Weides, Mingqi Zhang, Paniz Foshat, Shima Poorgholam-Khanjari, Valentino Seferai","cross_cats":["cond-mat.supr-con","cs.ET","cs.SY","eess.SY","physics.app-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-09-09T12:36:34Z","title":"On-chip microwave sensing of quasiparticles in tantalum superconducting circuits on silicon for scalable quantum technologies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.07669","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:b2caa3456703c8cc49f300b7a6580f51e5497f00c5fc13f5055281a62d9b5776","target":"record","created_at":"2026-07-05T12:07:26Z","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":"f0352d53769216df3167c95d6758ea6c9989931d29e25946363994b63c40aa46","cross_cats_sorted":["cond-mat.supr-con","cs.ET","cs.SY","eess.SY","physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-09-09T12:36:34Z","title_canon_sha256":"d4f4d7c5dedcc2ee97af87a460ff9ea183f860cda81c0acac8c50c4a130d6be9"},"schema_version":"1.0","source":{"id":"2509.07669","kind":"arxiv","version":1}},"canonical_sha256":"a741a787ead1f846fe0ae466110e6a7b709216498dc06d47322a9f85c7a09a78","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a741a787ead1f846fe0ae466110e6a7b709216498dc06d47322a9f85c7a09a78","first_computed_at":"2026-07-05T12:07:26.028690Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:07:26.028690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yqV39FWnCbJ4K6U0bw2NykaEMgyorPvU0kkbj1VxY41aC09jWJ1gOnzZQF04VbCBlcLWYnANFw6TKiwprDW3Cg==","signature_status":"signed_v1","signed_at":"2026-07-05T12:07:26.029174Z","signed_message":"canonical_sha256_bytes"},"source_id":"2509.07669","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b2caa3456703c8cc49f300b7a6580f51e5497f00c5fc13f5055281a62d9b5776","sha256:fc33d55ebc393b68faa1f7ebe612de59198967691d94d65c4f59eb0eb27d0edb"],"state_sha256":"95a0e84d12f88a848de17ee1647a0d569ef158ec5cbc6e22fc6132ca7c150f95"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I0yGWSgcrmwfCvVoLlU/vSQhyp+4LZh5fKHlrZXiVR7+/0DS7gKiqXt4lVcu22H2sXGJwTcIIzdxIMjI5+5EDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T08:06:32.708025Z","bundle_sha256":"354a4805cc65200769024534d017b492f75feb7046b0eaacf75beee1753146e6"}}