{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:QEV4ZQWNBRC35RBKCYNMWVOIKV","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":"e1b4db322dfb0a8c247e4d88ca8d7b782eccd79023c1e899504e594c1f69803a","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-03-24T20:02:12Z","title_canon_sha256":"96005204ca8be8caa174f2d02bf7c7383ff40091522b5f3eb19a8e8babad11cc"},"schema_version":"1.0","source":{"id":"2003.11097","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2003.11097","created_at":"2026-07-05T01:02:13Z"},{"alias_kind":"arxiv_version","alias_value":"2003.11097v1","created_at":"2026-07-05T01:02:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2003.11097","created_at":"2026-07-05T01:02:13Z"},{"alias_kind":"pith_short_12","alias_value":"QEV4ZQWNBRC3","created_at":"2026-07-05T01:02:13Z"},{"alias_kind":"pith_short_16","alias_value":"QEV4ZQWNBRC35RBK","created_at":"2026-07-05T01:02:13Z"},{"alias_kind":"pith_short_8","alias_value":"QEV4ZQWN","created_at":"2026-07-05T01:02:13Z"}],"graph_snapshots":[{"event_id":"sha256:ab72fc181c778d10199163fd4139cc885a78a3b225756586e2d126a9866f432e","target":"graph","created_at":"2026-07-05T01:02:13Z","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/2003.11097/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Solid-state quantum acoustodynamic (QAD) systems provide a compact platform for quantum information storage and processing by coupling acoustic phonon sources with superconducting or spin qubits. The multi-mode composite high-overtone bulk acoustic wave resonator (HBAR) is a popular phonon source well suited for QAD. However, scattering from defects, grain boundaries, and interfacial/surface roughness in the composite transducer severely limits the phonon relaxation time in sputter-deposited devices. Here, we grow an epitaxial-HBAR, consisting of a metallic NbN bottom electrode and a piezoelec","authors_text":"Andrew C. Lang, Brian P. Downey, David J. Meyer, D.Scott Katzer, Neeraj Nepal, Rhonda M. Stroud, Vikrant J. Gokhale","cross_cats":["cond-mat.mes-hall","cond-mat.mtrl-sci","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-03-24T20:02:12Z","title":"Epitaxial bulk acoustic wave resonators as highly coherent multi-phonon sources for quantum acoustodynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2003.11097","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":"sha256:376bcfee0c9d70d8a87d1d1eb43f8e0f318cae6f67e688476d84eaa715a9fe94","target":"record","created_at":"2026-07-05T01:02:13Z","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":"e1b4db322dfb0a8c247e4d88ca8d7b782eccd79023c1e899504e594c1f69803a","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-03-24T20:02:12Z","title_canon_sha256":"96005204ca8be8caa174f2d02bf7c7383ff40091522b5f3eb19a8e8babad11cc"},"schema_version":"1.0","source":{"id":"2003.11097","kind":"arxiv","version":1}},"canonical_sha256":"812bccc2cd0c45bec42a161acb55c8555d6a7fcc81007b4409e45bb83f16c3a2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"812bccc2cd0c45bec42a161acb55c8555d6a7fcc81007b4409e45bb83f16c3a2","first_computed_at":"2026-07-05T01:02:13.179158Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:02:13.179158Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oFXIfKaAPWvimNLn4pezjHzrJE3j3VVs4HnOCOv5nkhxh02qKrQzZLWHLwY5nN9irmG7zcHUd77f9In0aIKwAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:02:13.179577Z","signed_message":"canonical_sha256_bytes"},"source_id":"2003.11097","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:376bcfee0c9d70d8a87d1d1eb43f8e0f318cae6f67e688476d84eaa715a9fe94","sha256:ab72fc181c778d10199163fd4139cc885a78a3b225756586e2d126a9866f432e"],"state_sha256":"a80e65fc88bc8170a1a2fae41e1ee32db1084ecfcd9bae713312b66628ebaa19"}