{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:4M6DOSBMNGZHWJ6C6FUX6S6LWH","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":"2e6f8a923ef4dfbffbdb30cae0d014718e667c1705177a93dd0ca733ce1d68e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-03-15T00:04:35Z","title_canon_sha256":"a17091d1271b23f09a951035e08ab9d1d1bd8a8693972f22b13367dccdf7697c"},"schema_version":"1.0","source":{"id":"1503.04364","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.04364","created_at":"2026-05-18T02:23:25Z"},{"alias_kind":"arxiv_version","alias_value":"1503.04364v1","created_at":"2026-05-18T02:23:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.04364","created_at":"2026-05-18T02:23:25Z"},{"alias_kind":"pith_short_12","alias_value":"4M6DOSBMNGZH","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4M6DOSBMNGZHWJ6C","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4M6DOSBM","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:cf4604a91ea87103a0b611bfead92020548a536d253a11e56e63236cc0d3a0eb","target":"graph","created_at":"2026-05-18T02:23:25Z","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":"Josephson parametric amplifiers have become a critical tool in superconducting device physics due to their high gain and quantum-limited noise. Traveling wave parametric amplifiers (TWPAs) promise similar noise performance while allowing for significant increases in both bandwidth and dynamic range. We present a TWPA device based on an LC-ladder transmission line of Josephson junctions and parallel plate capacitors using low-loss amorphous silicon dielectric. Crucially, we have inserted $\\lambda/4$ resonators at regular intervals along the transmission line in order to maintain the phase match","authors_text":"A. Dunsworth, A. Megrant, A. Vainsencher, B. Campbell, B. Chiaro, C. Neill, D. Sank, E. Jeffrey, I.-C. Hoi, J. Gao, J. Kelly, John M. Martinis, J. Wenner, J.Y. Mutus, P.J.J. O'Malley, P. Roushan, R. Barends, S. Chaudhuri, T.C. White, Yu Chen, Z. Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-03-15T00:04:35Z","title":"Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.04364","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":"sha256:8df45517eaa5d31280d5bf53c28f5fdd04c4fdc1e608bec97c21b478672ea79d","target":"record","created_at":"2026-05-18T02:23:25Z","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":"2e6f8a923ef4dfbffbdb30cae0d014718e667c1705177a93dd0ca733ce1d68e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-03-15T00:04:35Z","title_canon_sha256":"a17091d1271b23f09a951035e08ab9d1d1bd8a8693972f22b13367dccdf7697c"},"schema_version":"1.0","source":{"id":"1503.04364","kind":"arxiv","version":1}},"canonical_sha256":"e33c37482c69b27b27c2f1697f4bcbb1dbc71122095961fd1559cfed42ce5b6b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e33c37482c69b27b27c2f1697f4bcbb1dbc71122095961fd1559cfed42ce5b6b","first_computed_at":"2026-05-18T02:23:25.333957Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:23:25.333957Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sHO9Kc48Dim9cOGoAlGcpj0TPm6UedsuEPrLtsGby2FB1krDcApk6/+M7OLSCIYSLBhWAUyCsi8f21DgPUjwBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:23:25.334666Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.04364","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8df45517eaa5d31280d5bf53c28f5fdd04c4fdc1e608bec97c21b478672ea79d","sha256:cf4604a91ea87103a0b611bfead92020548a536d253a11e56e63236cc0d3a0eb"],"state_sha256":"3a63bdba296637b9ddfd50346cfc2ede342aac77d868a203f80a4b5b74e3c47e"}