{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:32W5KP4AQDWVLY3P7GUXCXHX6E","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":"26689f02a4a6d086b12ed763a4e9e1a5650d31519ba0a7f54c3a6de3a3f8e8b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2011-06-07T12:16:49Z","title_canon_sha256":"408eb8db66a143a99b9653bd8a9babe2ed189c2ec5c5eb1c49e1cab9801af45c"},"schema_version":"1.0","source":{"id":"1106.1326","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.1326","created_at":"2026-05-18T04:04:15Z"},{"alias_kind":"arxiv_version","alias_value":"1106.1326v3","created_at":"2026-05-18T04:04:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.1326","created_at":"2026-05-18T04:04:15Z"},{"alias_kind":"pith_short_12","alias_value":"32W5KP4AQDWV","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"32W5KP4AQDWVLY3P","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"32W5KP4A","created_at":"2026-05-18T12:26:18Z"}],"graph_snapshots":[{"event_id":"sha256:7b616981e438140a73ebe235b5d42a88bfdf9c7210c4e41e0e86d17ba30f3ffa","target":"graph","created_at":"2026-05-18T04:04:15Z","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":"The achievable fidelity of many nanoelectronic devices based on superconducting aluminum is limited by either the density of residual nonequilibrium quasiparticles n_qp or the density of quasiparticle states in the gap, characterized by Dynes parameter \\gamma. We infer upper bounds n_qp < 0.033 um^-3 and \\gamma < 1.6*10^-7 from transport measurements performed on Al/AlOx/Cu single-electron transistors, improving previous results by an order of magnitude. Owing to efficient microwave shielding and quasiparticle relaxation, typical number of quasiparticles in the superconducting leads is zero.","authors_text":"A. Kemppinen, J. P. Pekola, O.-P. Saira, V. F. Maisi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2011-06-07T12:16:49Z","title":"Vanishing quasiparticle density in a hybrid Al/Cu/Al single-electron transistor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.1326","kind":"arxiv","version":3},"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:a5c8606ae5b178958064200f8501fb7810d98d9b7e8f09dc61958d52f38e7181","target":"record","created_at":"2026-05-18T04:04:15Z","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":"26689f02a4a6d086b12ed763a4e9e1a5650d31519ba0a7f54c3a6de3a3f8e8b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2011-06-07T12:16:49Z","title_canon_sha256":"408eb8db66a143a99b9653bd8a9babe2ed189c2ec5c5eb1c49e1cab9801af45c"},"schema_version":"1.0","source":{"id":"1106.1326","kind":"arxiv","version":3}},"canonical_sha256":"deadd53f8080ed55e36ff9a9715cf7f11d2c689936464cd4398b03583b2e11fc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"deadd53f8080ed55e36ff9a9715cf7f11d2c689936464cd4398b03583b2e11fc","first_computed_at":"2026-05-18T04:04:15.266666Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:04:15.266666Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1WZRnw+DktkBINGrpZaTRe8mLnT9Kk1MfKyWQEhrFMwbBJgFlUfpTl9TrsCBQb5cJHEioMFI40rZhM3SITQeBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:04:15.267242Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.1326","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a5c8606ae5b178958064200f8501fb7810d98d9b7e8f09dc61958d52f38e7181","sha256:7b616981e438140a73ebe235b5d42a88bfdf9c7210c4e41e0e86d17ba30f3ffa"],"state_sha256":"c87b8276b7c8f6ae3e3b7c711159582f08d83d2c32f051934d60c2c251fc1c06"}