{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:HX3TFI64BC74PCIW5XNF6SGLWZ","short_pith_number":"pith:HX3TFI64","canonical_record":{"source":{"id":"2507.18672","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-07-24T11:44:16Z","cross_cats_sorted":["physics.acc-ph"],"title_canon_sha256":"79fde5da8328c6bd59efb9148141981c0b961dcd74b0085b2fa4c5335f26ddd1","abstract_canon_sha256":"8cb87ec85fff8231fedfb8fd62c287bc21d213c3a7d0858cacdfa05958cb24bd"},"schema_version":"1.0"},"canonical_sha256":"3df732a3dc08bfc78916edda5f48cbb6630f0d04dcda76ba14660c6e36c22174","source":{"kind":"arxiv","id":"2507.18672","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.18672","created_at":"2026-07-05T11:46:23Z"},{"alias_kind":"arxiv_version","alias_value":"2507.18672v2","created_at":"2026-07-05T11:46:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.18672","created_at":"2026-07-05T11:46:23Z"},{"alias_kind":"pith_short_12","alias_value":"HX3TFI64BC74","created_at":"2026-07-05T11:46:23Z"},{"alias_kind":"pith_short_16","alias_value":"HX3TFI64BC74PCIW","created_at":"2026-07-05T11:46:23Z"},{"alias_kind":"pith_short_8","alias_value":"HX3TFI64","created_at":"2026-07-05T11:46:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:HX3TFI64BC74PCIW5XNF6SGLWZ","target":"record","payload":{"canonical_record":{"source":{"id":"2507.18672","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-07-24T11:44:16Z","cross_cats_sorted":["physics.acc-ph"],"title_canon_sha256":"79fde5da8328c6bd59efb9148141981c0b961dcd74b0085b2fa4c5335f26ddd1","abstract_canon_sha256":"8cb87ec85fff8231fedfb8fd62c287bc21d213c3a7d0858cacdfa05958cb24bd"},"schema_version":"1.0"},"canonical_sha256":"3df732a3dc08bfc78916edda5f48cbb6630f0d04dcda76ba14660c6e36c22174","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:46:23.403222Z","signature_b64":"OigxVobXJ3eUn2s5gY7jiC/G8wDU6tC1PsWBTc392cM1RtHuho0c8M4SrecayScNBYm07MqIc0mNO/VynxU+Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3df732a3dc08bfc78916edda5f48cbb6630f0d04dcda76ba14660c6e36c22174","last_reissued_at":"2026-07-05T11:46:23.402672Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:46:23.402672Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.18672","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":"2026-07-05T11:46:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UO6eXRv59Ql54DoTgd14eVzUzw26/KD8pI8VvR1k55gDoBCIhl3gT2eSG36ct9T3gUm/dFD+PvZgn4RNGWmkCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T13:00:31.321628Z"},"content_sha256":"9e8dbff976555919a1b493f32d092b4ac029c66b98052c7b726abb493890d616","schema_version":"1.0","event_id":"sha256:9e8dbff976555919a1b493f32d092b4ac029c66b98052c7b726abb493890d616"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:HX3TFI64BC74PCIW5XNF6SGLWZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Analysis of RF Surface Loss in a Planar 2D Qubit","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.acc-ph"],"primary_cat":"quant-ph","authors_text":"Akshay Murthy (1), Alexander Romanenko (1) ((1) Fermi National Accelerator Laboratory), Andrei Lunin (1), Anna Grassellino (1), Mustafa Bal (1), Shaojiang Zhu (1)","submitted_at":"2025-07-24T11:44:16Z","abstract_excerpt":"The Josephson junction and shunt capacitor form a transmon qubit, which is the cornerstone of modern quantum computing platforms. For reliable quantum computing, it is important how long a qubit can remain in a superposition of quantum states, which is determined by the coherence time (T1). The coherence time of a qubit effectively sets the \"lifetime\" of usable quantum information, determining how long quantum computations can be performed before errors occur and information is lost. There are several sources of decoherence in transmon qubits, but the predominant one is generally considered to"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.18672","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/2507.18672/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":"2026-07-05T11:46:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uvHP2K95S/CVQPSOTx+y67pVYw3bpGWSUjIZcy4odDXvmsc8Aq/ZGp2tPDLYosa2VD5mAYKfY3wtuEG5xQB0Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T13:00:31.321979Z"},"content_sha256":"ff95ae38d8808a22e96f8418333267e0a5ac1e7f9b85666e66f3b3d866c91a30","schema_version":"1.0","event_id":"sha256:ff95ae38d8808a22e96f8418333267e0a5ac1e7f9b85666e66f3b3d866c91a30"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HX3TFI64BC74PCIW5XNF6SGLWZ/bundle.json","state_url":"https://pith.science/pith/HX3TFI64BC74PCIW5XNF6SGLWZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HX3TFI64BC74PCIW5XNF6SGLWZ/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":"2026-08-20T13:00:31Z","links":{"resolver":"https://pith.science/pith/HX3TFI64BC74PCIW5XNF6SGLWZ","bundle":"https://pith.science/pith/HX3TFI64BC74PCIW5XNF6SGLWZ/bundle.json","state":"https://pith.science/pith/HX3TFI64BC74PCIW5XNF6SGLWZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HX3TFI64BC74PCIW5XNF6SGLWZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:HX3TFI64BC74PCIW5XNF6SGLWZ","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":"8cb87ec85fff8231fedfb8fd62c287bc21d213c3a7d0858cacdfa05958cb24bd","cross_cats_sorted":["physics.acc-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-07-24T11:44:16Z","title_canon_sha256":"79fde5da8328c6bd59efb9148141981c0b961dcd74b0085b2fa4c5335f26ddd1"},"schema_version":"1.0","source":{"id":"2507.18672","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.18672","created_at":"2026-07-05T11:46:23Z"},{"alias_kind":"arxiv_version","alias_value":"2507.18672v2","created_at":"2026-07-05T11:46:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.18672","created_at":"2026-07-05T11:46:23Z"},{"alias_kind":"pith_short_12","alias_value":"HX3TFI64BC74","created_at":"2026-07-05T11:46:23Z"},{"alias_kind":"pith_short_16","alias_value":"HX3TFI64BC74PCIW","created_at":"2026-07-05T11:46:23Z"},{"alias_kind":"pith_short_8","alias_value":"HX3TFI64","created_at":"2026-07-05T11:46:23Z"}],"graph_snapshots":[{"event_id":"sha256:ff95ae38d8808a22e96f8418333267e0a5ac1e7f9b85666e66f3b3d866c91a30","target":"graph","created_at":"2026-07-05T11:46:23Z","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/2507.18672/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Josephson junction and shunt capacitor form a transmon qubit, which is the cornerstone of modern quantum computing platforms. For reliable quantum computing, it is important how long a qubit can remain in a superposition of quantum states, which is determined by the coherence time (T1). The coherence time of a qubit effectively sets the \"lifetime\" of usable quantum information, determining how long quantum computations can be performed before errors occur and information is lost. There are several sources of decoherence in transmon qubits, but the predominant one is generally considered to","authors_text":"Akshay Murthy (1), Alexander Romanenko (1) ((1) Fermi National Accelerator Laboratory), Andrei Lunin (1), Anna Grassellino (1), Mustafa Bal (1), Shaojiang Zhu (1)","cross_cats":["physics.acc-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-07-24T11:44:16Z","title":"Analysis of RF Surface Loss in a Planar 2D Qubit"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.18672","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":"sha256:9e8dbff976555919a1b493f32d092b4ac029c66b98052c7b726abb493890d616","target":"record","created_at":"2026-07-05T11:46:23Z","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":"8cb87ec85fff8231fedfb8fd62c287bc21d213c3a7d0858cacdfa05958cb24bd","cross_cats_sorted":["physics.acc-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-07-24T11:44:16Z","title_canon_sha256":"79fde5da8328c6bd59efb9148141981c0b961dcd74b0085b2fa4c5335f26ddd1"},"schema_version":"1.0","source":{"id":"2507.18672","kind":"arxiv","version":2}},"canonical_sha256":"3df732a3dc08bfc78916edda5f48cbb6630f0d04dcda76ba14660c6e36c22174","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3df732a3dc08bfc78916edda5f48cbb6630f0d04dcda76ba14660c6e36c22174","first_computed_at":"2026-07-05T11:46:23.402672Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:46:23.402672Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OigxVobXJ3eUn2s5gY7jiC/G8wDU6tC1PsWBTc392cM1RtHuho0c8M4SrecayScNBYm07MqIc0mNO/VynxU+Dg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:46:23.403222Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.18672","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e8dbff976555919a1b493f32d092b4ac029c66b98052c7b726abb493890d616","sha256:ff95ae38d8808a22e96f8418333267e0a5ac1e7f9b85666e66f3b3d866c91a30"],"state_sha256":"bbf7ae38fbab0a831b6d2ef95cf15b82b139299b2bd774a4afc54b7d2b44109e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gC465i+v3H3PXY5sdUd3ZyLnvRoW7G2o1CchbXhry1DVbF97Ykfa9zuwmM5OcRSTikju6cl7WIXyajwt3hCMBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T13:00:31.325463Z","bundle_sha256":"6cac2967cd1588efea10e100d65594e87c8c6c54caebf6bf3612cbcaf524924c"}}