{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:D3WE3JICNCNWZQ2NMXLAAYLZXY","short_pith_number":"pith:D3WE3JIC","canonical_record":{"source":{"id":"2403.00286","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-03-01T05:07:10Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"52752873a602d10113b44fadd047f90b7c31f8bb4edbfb6d8c8fd205cfec6239","abstract_canon_sha256":"05c0acbe13d49183df81dfae52570143dfcabb6b3589c79728e68430b83979ba"},"schema_version":"1.0"},"canonical_sha256":"1eec4da502689b6cc34d65d6006179be16bea3281c9d2e3b612c4112b3eef0bc","source":{"kind":"arxiv","id":"2403.00286","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2403.00286","created_at":"2026-07-05T11:03:49Z"},{"alias_kind":"arxiv_version","alias_value":"2403.00286v2","created_at":"2026-07-05T11:03:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2403.00286","created_at":"2026-07-05T11:03:49Z"},{"alias_kind":"pith_short_12","alias_value":"D3WE3JICNCNW","created_at":"2026-07-05T11:03:49Z"},{"alias_kind":"pith_short_16","alias_value":"D3WE3JICNCNWZQ2N","created_at":"2026-07-05T11:03:49Z"},{"alias_kind":"pith_short_8","alias_value":"D3WE3JIC","created_at":"2026-07-05T11:03:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:D3WE3JICNCNWZQ2NMXLAAYLZXY","target":"record","payload":{"canonical_record":{"source":{"id":"2403.00286","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-03-01T05:07:10Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"52752873a602d10113b44fadd047f90b7c31f8bb4edbfb6d8c8fd205cfec6239","abstract_canon_sha256":"05c0acbe13d49183df81dfae52570143dfcabb6b3589c79728e68430b83979ba"},"schema_version":"1.0"},"canonical_sha256":"1eec4da502689b6cc34d65d6006179be16bea3281c9d2e3b612c4112b3eef0bc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:03:49.185536Z","signature_b64":"C7WwsPqzh1beYMI8P8N6RaHTDzIwa67F+9ZMx3dGf2kaJODGgqm3j67S4X5qlCMBt726pxXuVYIG5wlH0zMbBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1eec4da502689b6cc34d65d6006179be16bea3281c9d2e3b612c4112b3eef0bc","last_reissued_at":"2026-07-05T11:03:49.185112Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:03:49.185112Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2403.00286","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":"2026-07-05T11:03:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3q2RKFAiea2f5K77i48xzB/vZG47aVfEQ76BLyhlPt8ule2EQ4ilRia1US83WBlhUTsxwG20yNJx5ADTzgE0CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T17:29:06.656528Z"},"content_sha256":"c9afe6b04ebb9c03f3ec5b4de02df48f08b7d9b263987d07e5ac28d685c741ba","schema_version":"1.0","event_id":"sha256:c9afe6b04ebb9c03f3ec5b4de02df48f08b7d9b263987d07e5ac28d685c741ba"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:D3WE3JICNCNWZQ2NMXLAAYLZXY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Niobium coaxial cavities with internal quality factors exceeding 1.5 billion for circuit quantum electrodynamics","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"quant-ph","authors_text":"Alexander Anferov, Andrew E. Oriani, Ankur Agrawal, David I. Schuster, Fang Zhao, Kevin He, Riju Banerjee, Srivatsan Chakram, Tanay Roy","submitted_at":"2024-03-01T05:07:10Z","abstract_excerpt":"Group-V materials such as niobium and tantalum have become popular choices for extending the performance of circuit quantum electrodynamics (cQED) platforms allowing for quantum processors and memories with reduced error rates and more modes. The complex surface chemistry of niobium however makes identifying the main modes of decoherence difficult at millikelvin temperatures and single-photon powers. We use niobium coaxial quarter-wave cavities to study the impact of etch chemistry, prolonged atmospheric exposure, and the significance of cavity conditions prior to and during cooldown, in parti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2403.00286","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/2403.00286/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":"2026-07-05T11:03:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/q9c3oIVFYqL+2bJikdNoWnq6l0/h6S3nElG5+9VQ0MfgLXfKU2+ijPsCEhIf47gIpVAV1mKx3NJDocQv53gAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T17:29:06.657044Z"},"content_sha256":"37c2bce3e4663780c52100fef377e9f2bb024d272cd03a818acc21f307b2321c","schema_version":"1.0","event_id":"sha256:37c2bce3e4663780c52100fef377e9f2bb024d272cd03a818acc21f307b2321c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D3WE3JICNCNWZQ2NMXLAAYLZXY/bundle.json","state_url":"https://pith.science/pith/D3WE3JICNCNWZQ2NMXLAAYLZXY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D3WE3JICNCNWZQ2NMXLAAYLZXY/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":"2026-08-14T17:29:06Z","links":{"resolver":"https://pith.science/pith/D3WE3JICNCNWZQ2NMXLAAYLZXY","bundle":"https://pith.science/pith/D3WE3JICNCNWZQ2NMXLAAYLZXY/bundle.json","state":"https://pith.science/pith/D3WE3JICNCNWZQ2NMXLAAYLZXY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D3WE3JICNCNWZQ2NMXLAAYLZXY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:D3WE3JICNCNWZQ2NMXLAAYLZXY","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":"05c0acbe13d49183df81dfae52570143dfcabb6b3589c79728e68430b83979ba","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-03-01T05:07:10Z","title_canon_sha256":"52752873a602d10113b44fadd047f90b7c31f8bb4edbfb6d8c8fd205cfec6239"},"schema_version":"1.0","source":{"id":"2403.00286","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2403.00286","created_at":"2026-07-05T11:03:49Z"},{"alias_kind":"arxiv_version","alias_value":"2403.00286v2","created_at":"2026-07-05T11:03:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2403.00286","created_at":"2026-07-05T11:03:49Z"},{"alias_kind":"pith_short_12","alias_value":"D3WE3JICNCNW","created_at":"2026-07-05T11:03:49Z"},{"alias_kind":"pith_short_16","alias_value":"D3WE3JICNCNWZQ2N","created_at":"2026-07-05T11:03:49Z"},{"alias_kind":"pith_short_8","alias_value":"D3WE3JIC","created_at":"2026-07-05T11:03:49Z"}],"graph_snapshots":[{"event_id":"sha256:37c2bce3e4663780c52100fef377e9f2bb024d272cd03a818acc21f307b2321c","target":"graph","created_at":"2026-07-05T11:03:49Z","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/2403.00286/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Group-V materials such as niobium and tantalum have become popular choices for extending the performance of circuit quantum electrodynamics (cQED) platforms allowing for quantum processors and memories with reduced error rates and more modes. The complex surface chemistry of niobium however makes identifying the main modes of decoherence difficult at millikelvin temperatures and single-photon powers. We use niobium coaxial quarter-wave cavities to study the impact of etch chemistry, prolonged atmospheric exposure, and the significance of cavity conditions prior to and during cooldown, in parti","authors_text":"Alexander Anferov, Andrew E. Oriani, Ankur Agrawal, David I. Schuster, Fang Zhao, Kevin He, Riju Banerjee, Srivatsan Chakram, Tanay Roy","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-03-01T05:07:10Z","title":"Niobium coaxial cavities with internal quality factors exceeding 1.5 billion for circuit quantum electrodynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2403.00286","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:c9afe6b04ebb9c03f3ec5b4de02df48f08b7d9b263987d07e5ac28d685c741ba","target":"record","created_at":"2026-07-05T11:03:49Z","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":"05c0acbe13d49183df81dfae52570143dfcabb6b3589c79728e68430b83979ba","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-03-01T05:07:10Z","title_canon_sha256":"52752873a602d10113b44fadd047f90b7c31f8bb4edbfb6d8c8fd205cfec6239"},"schema_version":"1.0","source":{"id":"2403.00286","kind":"arxiv","version":2}},"canonical_sha256":"1eec4da502689b6cc34d65d6006179be16bea3281c9d2e3b612c4112b3eef0bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1eec4da502689b6cc34d65d6006179be16bea3281c9d2e3b612c4112b3eef0bc","first_computed_at":"2026-07-05T11:03:49.185112Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:03:49.185112Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C7WwsPqzh1beYMI8P8N6RaHTDzIwa67F+9ZMx3dGf2kaJODGgqm3j67S4X5qlCMBt726pxXuVYIG5wlH0zMbBA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:03:49.185536Z","signed_message":"canonical_sha256_bytes"},"source_id":"2403.00286","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c9afe6b04ebb9c03f3ec5b4de02df48f08b7d9b263987d07e5ac28d685c741ba","sha256:37c2bce3e4663780c52100fef377e9f2bb024d272cd03a818acc21f307b2321c"],"state_sha256":"7f5b55cfbfb977052b15c48dd0b89688cd961597856184766cf549b4781b1ed3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0+98nPBTnMfxRUzr9BhBzBWcnx4Zw9Q0igYbDH4AzO7Dq6r4LLMkbfqrVLdbMS1IX0gykUm13AaDYuJPx30fBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T17:29:06.666119Z","bundle_sha256":"badd9e2bda40459ac576f3c844219ebc911896c2bbe34aee6d00246dcab88a15"}}