{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2SQQIPVX6IABYLJJWWT2SDBSJX","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":"a7019715c6390b2744a38e4a108811c01d13eb8ac7351927f8cd19bf13d59b03","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-01-22T11:30:32Z","title_canon_sha256":"3878e1e1ff1736182d6f74d2c37ca9519ca97b06a7cc043be91ea09db25000f0"},"schema_version":"1.0","source":{"id":"1901.07267","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07267","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07267v2","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07267","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"pith_short_12","alias_value":"2SQQIPVX6IAB","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2SQQIPVX6IABYLJJ","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2SQQIPVX","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:95be780e0a40d4a420f8c304abf06813f9961f4928b47994ee36e0b39a5eb4b6","target":"graph","created_at":"2026-05-17T23:50:04Z","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":"Detecting weak radio-frequency electromagnetic fields plays a crucial role in wide range of fields, from radio astronomy to nuclear magnetic resonance imaging. In quantum mechanics, the ultimate limit of a weak field is a single-photon. Detecting and manipulating single-photons at megahertz frequencies presents a challenge as, even at cryogenic temperatures, thermal fluctuations are significant. Here, we use a gigahertz superconducting qubit to directly observe the quantization of a megahertz radio-frequency electromagnetic field. Using the qubit, we achieve quantum control over thermal photon","authors_text":"Brian Baker, Christian Dickel, Gary A. Steele, Jacob Dalle, Mario F. Gely, Marios Kounalakis, Mark D. Jenkins, R\\'emy Vatr\\'e","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-01-22T11:30:32Z","title":"Observation and stabilization of photonic Fock states in a hot radio-frequency resonator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07267","kind":"arxiv","version":2},"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":"sha256:447744ec729ab28b1735ffe5c62593cac09865afce4a42671fd0eae2f40e2f4d","target":"record","created_at":"2026-05-17T23:50:04Z","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":"a7019715c6390b2744a38e4a108811c01d13eb8ac7351927f8cd19bf13d59b03","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-01-22T11:30:32Z","title_canon_sha256":"3878e1e1ff1736182d6f74d2c37ca9519ca97b06a7cc043be91ea09db25000f0"},"schema_version":"1.0","source":{"id":"1901.07267","kind":"arxiv","version":2}},"canonical_sha256":"d4a1043eb7f2001c2d29b5a7a90c324df04f4368d12324926189d7f35965b27b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d4a1043eb7f2001c2d29b5a7a90c324df04f4368d12324926189d7f35965b27b","first_computed_at":"2026-05-17T23:50:04.586744Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:04.586744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9RxO2rYFAd6VBSqWnwV0xFNVLA1ldaYbcTtObLrW2Og8XydJYVi+PAVitieSm7/7D5TZA/iL+bOTGlb4FweOAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:04.587261Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.07267","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:447744ec729ab28b1735ffe5c62593cac09865afce4a42671fd0eae2f40e2f4d","sha256:95be780e0a40d4a420f8c304abf06813f9961f4928b47994ee36e0b39a5eb4b6"],"state_sha256":"230d3ea16dbe6c0b1b1c727e2692db2bdce200f1923584f0911f18b87b88b899"}