{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:EZDVHLGVBQPJMKGKCJTBPYZLHN","short_pith_number":"pith:EZDVHLGV","canonical_record":{"source":{"id":"1607.07902","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-07-26T21:26:38Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"660b7ae777452f0d7ec48541710827d4f9a55fbf7c031c3fa4838509cfbfcaff","abstract_canon_sha256":"c784d2488315e0fcc04251152363b2aba9cfa06927007e9cc0e057b25395d376"},"schema_version":"1.0"},"canonical_sha256":"264753acd50c1e9628ca126617e32b3b7249793cf51896cb50fcfbb21da710f0","source":{"kind":"arxiv","id":"1607.07902","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.07902","created_at":"2026-05-18T01:10:22Z"},{"alias_kind":"arxiv_version","alias_value":"1607.07902v1","created_at":"2026-05-18T01:10:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.07902","created_at":"2026-05-18T01:10:22Z"},{"alias_kind":"pith_short_12","alias_value":"EZDVHLGVBQPJ","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"EZDVHLGVBQPJMKGK","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"EZDVHLGV","created_at":"2026-05-18T12:30:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:EZDVHLGVBQPJMKGKCJTBPYZLHN","target":"record","payload":{"canonical_record":{"source":{"id":"1607.07902","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-07-26T21:26:38Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"660b7ae777452f0d7ec48541710827d4f9a55fbf7c031c3fa4838509cfbfcaff","abstract_canon_sha256":"c784d2488315e0fcc04251152363b2aba9cfa06927007e9cc0e057b25395d376"},"schema_version":"1.0"},"canonical_sha256":"264753acd50c1e9628ca126617e32b3b7249793cf51896cb50fcfbb21da710f0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:22.996056Z","signature_b64":"0TJ66Vslqs/9Lml2SbbzNpi1zv8cIDm+vAnjAekOYiYr6Ea5r6TJEsyx2WTV8+ATqT+4c/MHPqQyLMYIZWfJAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"264753acd50c1e9628ca126617e32b3b7249793cf51896cb50fcfbb21da710f0","last_reissued_at":"2026-05-18T01:10:22.995521Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:22.995521Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.07902","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:10:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"utbSufvFcEfRSXfPm2YlY49DuxD/J4Ip0WFsRXJUw+Hcvjkwel2qm4clUJrs8ArJlT4Ed9D67oGj32vWEbKjCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T22:00:57.409670Z"},"content_sha256":"b6a1b570dd5cf50ef7ece30881f4f8bf20d8512107bdfce4202c8f5483825cbe","schema_version":"1.0","event_id":"sha256:b6a1b570dd5cf50ef7ece30881f4f8bf20d8512107bdfce4202c8f5483825cbe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:EZDVHLGVBQPJMKGKCJTBPYZLHN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultra-high Q Acoustic Resonance in Superfluid 4He","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"quant-ph","authors_text":"K.C. Schwab, L.A. DeLorenzo","submitted_at":"2016-07-26T21:26:38Z","abstract_excerpt":"We report the measurement of the acoustic quality factor of a gram-scale, kilo-hertz frequency superfluid resonator, detected through the parametric coupling to a superconducting niobium microwave cavity. For temperature between 400mK and 50mK, we observe a $T^{-4}$ temperature dependence of the quality factor, consistent with a 3-phonon dissipation mechanism. We observe Q factors up to $1.4\\cdot10^8$, consistent with the dissipation due to dilute $^3$He impurities, and expect that significant further improvements are possible. These experiments are relevant to exploring quantum behavior and d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.07902","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T01:10:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nFCRhVYLykQ532zxOeGZko5w6ym5pblLQdyaO7KIdUYGQdmzPby9MNOkoYpONWIKBKEoVIhGu95Nr/m+RorbBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T22:00:57.410141Z"},"content_sha256":"f058076dccf9f2e3cf9b13de75ed6e7e03c119ccb1198500b6b02134aa47b675","schema_version":"1.0","event_id":"sha256:f058076dccf9f2e3cf9b13de75ed6e7e03c119ccb1198500b6b02134aa47b675"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EZDVHLGVBQPJMKGKCJTBPYZLHN/bundle.json","state_url":"https://pith.science/pith/EZDVHLGVBQPJMKGKCJTBPYZLHN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EZDVHLGVBQPJMKGKCJTBPYZLHN/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":"2026-05-31T22:00:57Z","links":{"resolver":"https://pith.science/pith/EZDVHLGVBQPJMKGKCJTBPYZLHN","bundle":"https://pith.science/pith/EZDVHLGVBQPJMKGKCJTBPYZLHN/bundle.json","state":"https://pith.science/pith/EZDVHLGVBQPJMKGKCJTBPYZLHN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EZDVHLGVBQPJMKGKCJTBPYZLHN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:EZDVHLGVBQPJMKGKCJTBPYZLHN","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":"c784d2488315e0fcc04251152363b2aba9cfa06927007e9cc0e057b25395d376","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-07-26T21:26:38Z","title_canon_sha256":"660b7ae777452f0d7ec48541710827d4f9a55fbf7c031c3fa4838509cfbfcaff"},"schema_version":"1.0","source":{"id":"1607.07902","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.07902","created_at":"2026-05-18T01:10:22Z"},{"alias_kind":"arxiv_version","alias_value":"1607.07902v1","created_at":"2026-05-18T01:10:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.07902","created_at":"2026-05-18T01:10:22Z"},{"alias_kind":"pith_short_12","alias_value":"EZDVHLGVBQPJ","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"EZDVHLGVBQPJMKGK","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"EZDVHLGV","created_at":"2026-05-18T12:30:15Z"}],"graph_snapshots":[{"event_id":"sha256:f058076dccf9f2e3cf9b13de75ed6e7e03c119ccb1198500b6b02134aa47b675","target":"graph","created_at":"2026-05-18T01:10:22Z","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 report the measurement of the acoustic quality factor of a gram-scale, kilo-hertz frequency superfluid resonator, detected through the parametric coupling to a superconducting niobium microwave cavity. For temperature between 400mK and 50mK, we observe a $T^{-4}$ temperature dependence of the quality factor, consistent with a 3-phonon dissipation mechanism. We observe Q factors up to $1.4\\cdot10^8$, consistent with the dissipation due to dilute $^3$He impurities, and expect that significant further improvements are possible. These experiments are relevant to exploring quantum behavior and d","authors_text":"K.C. Schwab, L.A. DeLorenzo","cross_cats":["cond-mat.other"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-07-26T21:26:38Z","title":"Ultra-high Q Acoustic Resonance in Superfluid 4He"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.07902","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:b6a1b570dd5cf50ef7ece30881f4f8bf20d8512107bdfce4202c8f5483825cbe","target":"record","created_at":"2026-05-18T01:10:22Z","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":"c784d2488315e0fcc04251152363b2aba9cfa06927007e9cc0e057b25395d376","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-07-26T21:26:38Z","title_canon_sha256":"660b7ae777452f0d7ec48541710827d4f9a55fbf7c031c3fa4838509cfbfcaff"},"schema_version":"1.0","source":{"id":"1607.07902","kind":"arxiv","version":1}},"canonical_sha256":"264753acd50c1e9628ca126617e32b3b7249793cf51896cb50fcfbb21da710f0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"264753acd50c1e9628ca126617e32b3b7249793cf51896cb50fcfbb21da710f0","first_computed_at":"2026-05-18T01:10:22.995521Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:22.995521Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0TJ66Vslqs/9Lml2SbbzNpi1zv8cIDm+vAnjAekOYiYr6Ea5r6TJEsyx2WTV8+ATqT+4c/MHPqQyLMYIZWfJAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:22.996056Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.07902","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b6a1b570dd5cf50ef7ece30881f4f8bf20d8512107bdfce4202c8f5483825cbe","sha256:f058076dccf9f2e3cf9b13de75ed6e7e03c119ccb1198500b6b02134aa47b675"],"state_sha256":"f32215891bf26d27ebb19bf3938390ddb4ef5d181aa1d7fc7e454936e47a6261"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NoAY2y+EdFsd/x5ouAKS64eRGcupGbLbFOq3gz+kgHPJDXNohLtocOzdNrYyeFD+EkxbRbwqm3nXP6A6wifRBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T22:00:57.412836Z","bundle_sha256":"b5921bda87df539fafff165f74066b4e77ac0ce0fb8f4293a5e0416f04a3b163"}}