{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:QXDIWN75Q6MGV7HPRRABIP72YB","short_pith_number":"pith:QXDIWN75","canonical_record":{"source":{"id":"2412.16730","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-12-21T18:40:49Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"e8af5a10d48b0ec24f98ab6a74550bd63b169d95bfe05e494233567a1fbf4a6e","abstract_canon_sha256":"ce1ecedff5dc30955dab4ce1f5b2e6513113f89e908d7112fa800002f339e59a"},"schema_version":"1.0"},"canonical_sha256":"85c68b37fd87986afcef8c40143ffac055ceeca92b1a9699a652b5e9992da9b0","source":{"kind":"arxiv","id":"2412.16730","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2412.16730","created_at":"2026-07-05T11:19:50Z"},{"alias_kind":"arxiv_version","alias_value":"2412.16730v2","created_at":"2026-07-05T11:19:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.16730","created_at":"2026-07-05T11:19:50Z"},{"alias_kind":"pith_short_12","alias_value":"QXDIWN75Q6MG","created_at":"2026-07-05T11:19:50Z"},{"alias_kind":"pith_short_16","alias_value":"QXDIWN75Q6MGV7HP","created_at":"2026-07-05T11:19:50Z"},{"alias_kind":"pith_short_8","alias_value":"QXDIWN75","created_at":"2026-07-05T11:19:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:QXDIWN75Q6MGV7HPRRABIP72YB","target":"record","payload":{"canonical_record":{"source":{"id":"2412.16730","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-12-21T18:40:49Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"e8af5a10d48b0ec24f98ab6a74550bd63b169d95bfe05e494233567a1fbf4a6e","abstract_canon_sha256":"ce1ecedff5dc30955dab4ce1f5b2e6513113f89e908d7112fa800002f339e59a"},"schema_version":"1.0"},"canonical_sha256":"85c68b37fd87986afcef8c40143ffac055ceeca92b1a9699a652b5e9992da9b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:19:50.613713Z","signature_b64":"V+VYE+kyldY8eCfQuQLL76t5/e8URd1hVhf6rslyjUv7C4Eqc4lp/6pJaadzZCpMDGMRro8lsoFtsb9+n9NXAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"85c68b37fd87986afcef8c40143ffac055ceeca92b1a9699a652b5e9992da9b0","last_reissued_at":"2026-07-05T11:19:50.613227Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:19:50.613227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2412.16730","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:19:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uiVkpnDEzRAD7evDohg564RYCPoiqAJWrM/khwhMnJsbsK/e0sCCxwK9ZMIuJyim4MQ3NQ51ODoVTAQAFwm+Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T09:33:59.113140Z"},"content_sha256":"e5ae4afd7514cdb4761232b0d78b01a9004763bda9b74f284f5028d0dd01312f","schema_version":"1.0","event_id":"sha256:e5ae4afd7514cdb4761232b0d78b01a9004763bda9b74f284f5028d0dd01312f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:QXDIWN75Q6MGV7HPRRABIP72YB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interface-sensitive microwave loss in superconducting tantalum films sputtered on c-plane sapphire","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"quant-ph","authors_text":"Akash V. Dixit, Anthony P. McFadden, Florent Lecocq, JinSu Oh, Lin Zhou, Raymond Simmonds, Stephen Gill, Trevyn F.Q. Larson","submitted_at":"2024-12-21T18:40:49Z","abstract_excerpt":"Quantum coherence in superconducting circuits has increased steadily over the last decades as a result of a growing understanding of the various loss mechanisms. Recently, tantalum (Ta) emerged as a promising material to address microscopic sources of loss found on niobium (Nb) or aluminum (Al) surfaces. However, the effects of film and interface microstructure on low-temperature microwave loss are still not well understood. Here we present a systematic study of the structural and electrical properties of Ta and Nb films sputtered on c-plane sapphire at varying growth temperatures. As growth t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.16730","kind":"arxiv","version":2},"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/2412.16730/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":"2026-07-05T11:19:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3Kr1V/CXGAHxgvxY5VzVR3ccOWNuL//oQfsGpowL5j/AlMxDafmzLA37MbNwuF6oLJvrnwvaFQW1GkKuLr8/Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T09:33:59.113643Z"},"content_sha256":"a136d9b3418c61ee2afb50eec34bc7e8a044049ebc2627b4ca755689fba413f5","schema_version":"1.0","event_id":"sha256:a136d9b3418c61ee2afb50eec34bc7e8a044049ebc2627b4ca755689fba413f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QXDIWN75Q6MGV7HPRRABIP72YB/bundle.json","state_url":"https://pith.science/pith/QXDIWN75Q6MGV7HPRRABIP72YB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QXDIWN75Q6MGV7HPRRABIP72YB/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":"2026-08-04T09:33:59Z","links":{"resolver":"https://pith.science/pith/QXDIWN75Q6MGV7HPRRABIP72YB","bundle":"https://pith.science/pith/QXDIWN75Q6MGV7HPRRABIP72YB/bundle.json","state":"https://pith.science/pith/QXDIWN75Q6MGV7HPRRABIP72YB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QXDIWN75Q6MGV7HPRRABIP72YB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:QXDIWN75Q6MGV7HPRRABIP72YB","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":"ce1ecedff5dc30955dab4ce1f5b2e6513113f89e908d7112fa800002f339e59a","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-12-21T18:40:49Z","title_canon_sha256":"e8af5a10d48b0ec24f98ab6a74550bd63b169d95bfe05e494233567a1fbf4a6e"},"schema_version":"1.0","source":{"id":"2412.16730","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2412.16730","created_at":"2026-07-05T11:19:50Z"},{"alias_kind":"arxiv_version","alias_value":"2412.16730v2","created_at":"2026-07-05T11:19:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.16730","created_at":"2026-07-05T11:19:50Z"},{"alias_kind":"pith_short_12","alias_value":"QXDIWN75Q6MG","created_at":"2026-07-05T11:19:50Z"},{"alias_kind":"pith_short_16","alias_value":"QXDIWN75Q6MGV7HP","created_at":"2026-07-05T11:19:50Z"},{"alias_kind":"pith_short_8","alias_value":"QXDIWN75","created_at":"2026-07-05T11:19:50Z"}],"graph_snapshots":[{"event_id":"sha256:a136d9b3418c61ee2afb50eec34bc7e8a044049ebc2627b4ca755689fba413f5","target":"graph","created_at":"2026-07-05T11:19:50Z","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/2412.16730/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum coherence in superconducting circuits has increased steadily over the last decades as a result of a growing understanding of the various loss mechanisms. Recently, tantalum (Ta) emerged as a promising material to address microscopic sources of loss found on niobium (Nb) or aluminum (Al) surfaces. However, the effects of film and interface microstructure on low-temperature microwave loss are still not well understood. Here we present a systematic study of the structural and electrical properties of Ta and Nb films sputtered on c-plane sapphire at varying growth temperatures. As growth t","authors_text":"Akash V. Dixit, Anthony P. McFadden, Florent Lecocq, JinSu Oh, Lin Zhou, Raymond Simmonds, Stephen Gill, Trevyn F.Q. Larson","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-12-21T18:40:49Z","title":"Interface-sensitive microwave loss in superconducting tantalum films sputtered on c-plane sapphire"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.16730","kind":"arxiv","version":2},"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:e5ae4afd7514cdb4761232b0d78b01a9004763bda9b74f284f5028d0dd01312f","target":"record","created_at":"2026-07-05T11:19:50Z","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":"ce1ecedff5dc30955dab4ce1f5b2e6513113f89e908d7112fa800002f339e59a","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-12-21T18:40:49Z","title_canon_sha256":"e8af5a10d48b0ec24f98ab6a74550bd63b169d95bfe05e494233567a1fbf4a6e"},"schema_version":"1.0","source":{"id":"2412.16730","kind":"arxiv","version":2}},"canonical_sha256":"85c68b37fd87986afcef8c40143ffac055ceeca92b1a9699a652b5e9992da9b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"85c68b37fd87986afcef8c40143ffac055ceeca92b1a9699a652b5e9992da9b0","first_computed_at":"2026-07-05T11:19:50.613227Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:19:50.613227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"V+VYE+kyldY8eCfQuQLL76t5/e8URd1hVhf6rslyjUv7C4Eqc4lp/6pJaadzZCpMDGMRro8lsoFtsb9+n9NXAw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:19:50.613713Z","signed_message":"canonical_sha256_bytes"},"source_id":"2412.16730","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e5ae4afd7514cdb4761232b0d78b01a9004763bda9b74f284f5028d0dd01312f","sha256:a136d9b3418c61ee2afb50eec34bc7e8a044049ebc2627b4ca755689fba413f5"],"state_sha256":"2be760534c3439cce590d0e8d383f70edc9a78967f932eb3567731a4fd4f3316"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"STuqS4LZV3Qf6TJSZxa/YssWbn+arFkLJ4Ac9tyVq/XwUBdXSt/L3eD1FcpQyDqouCH+rOHwrS8PpTygrYIzCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T09:33:59.117282Z","bundle_sha256":"0c4e9af0ab3be4326802b3b3c205406862c6c09679514ea79e92eb8e497c57e5"}}