{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:TU5LDMP6VJXFYY2VYAFCYDKXHE","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":"e6dd8cfc120158c21f6b34bbd67e53d9ee5e29d41811da8f1015ae2bf9235f34","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-03-20T13:34:32Z","title_canon_sha256":"c073184be15469998cfd5bf3c04c79c40e8cab4a2ba5ecf604b1a94f296e9760"},"schema_version":"1.0","source":{"id":"1203.4431","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.4431","created_at":"2026-05-18T03:08:14Z"},{"alias_kind":"arxiv_version","alias_value":"1203.4431v1","created_at":"2026-05-18T03:08:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.4431","created_at":"2026-05-18T03:08:14Z"},{"alias_kind":"pith_short_12","alias_value":"TU5LDMP6VJXF","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"TU5LDMP6VJXFYY2V","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"TU5LDMP6","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:39019f6fdec50c33264f4db26da2b495855473c42fea7395ddd88263230daeda","target":"graph","created_at":"2026-05-18T03:08:14Z","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"},"paper":{"abstract_excerpt":"We have fabricated and measured Josephson junction defect spectrometers (JJDSs), which are frequency-tunable, nearly-harmonic oscillators that probe strongly-coupled two-level systems (TLSs) in the barrier of a Josephson junction (JJ). The JJDSs accommodate a wide range of junction inductances, $L_{J}$, while maintaining a resonance frequency, $f_{0}$, in the range of 4-8 GHz. By applying a magnetic flux bias to tune $f_{0}$, we detect strongly-coupled TLSs in the junction barrier as splittings in the device spectrum. JJDSs fabricated with a via-style Al/thermal AlOx/Al junction and measured a","authors_text":"C. J. Lobb, K. D. Osborn, M. J. A. Stoutimore, M. S. Khalil","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-03-20T13:34:32Z","title":"A Josephson junction defect spectrometer for measuring two-level systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.4431","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":"sha256:8f65f6454f43569c1819763769823080b4e92b9f658bb3c267582a61df42f908","target":"record","created_at":"2026-05-18T03:08:14Z","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":"e6dd8cfc120158c21f6b34bbd67e53d9ee5e29d41811da8f1015ae2bf9235f34","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-03-20T13:34:32Z","title_canon_sha256":"c073184be15469998cfd5bf3c04c79c40e8cab4a2ba5ecf604b1a94f296e9760"},"schema_version":"1.0","source":{"id":"1203.4431","kind":"arxiv","version":1}},"canonical_sha256":"9d3ab1b1feaa6e5c6355c00a2c0d57391c02c8526196a83dc04b364d08581989","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9d3ab1b1feaa6e5c6355c00a2c0d57391c02c8526196a83dc04b364d08581989","first_computed_at":"2026-05-18T03:08:14.691577Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:08:14.691577Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vdUyFpx6TkKGkenBMMx/N+wqYDdrP6xooT8e6GjCIqbYf1J0/t5WDHnDtJ5vc09/Cl5aDi/PKvxOzissbla9CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:08:14.692017Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.4431","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8f65f6454f43569c1819763769823080b4e92b9f658bb3c267582a61df42f908","sha256:39019f6fdec50c33264f4db26da2b495855473c42fea7395ddd88263230daeda"],"state_sha256":"9a39c50473b072c791da44359a8a0692b89f255b2b44009c1360747e6b40980d"}