{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:A2NAD7PTEHDEWZGSVWFGBCWSCB","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":"ec589c1da36929e32fc56393417af78e6073f4e09b7465c27ceebc76dfff6cfd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-27T09:47:14Z","title_canon_sha256":"df48d3d71607f62422b84301d9fd1ede81f99bef28ad1538efa1dbf725548fdd"},"schema_version":"1.0","source":{"id":"1505.07244","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.07244","created_at":"2026-05-18T01:19:12Z"},{"alias_kind":"arxiv_version","alias_value":"1505.07244v2","created_at":"2026-05-18T01:19:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.07244","created_at":"2026-05-18T01:19:12Z"},{"alias_kind":"pith_short_12","alias_value":"A2NAD7PTEHDE","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"A2NAD7PTEHDEWZGS","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"A2NAD7PT","created_at":"2026-05-18T12:29:10Z"}],"graph_snapshots":[{"event_id":"sha256:ef71cc20a3426bf8a03613de5fc3fb0d778ac9729df8c5d4cb05a06b5e5dc2ee","target":"graph","created_at":"2026-05-18T01:19:12Z","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 cooling of electrons in nanoelectronic Coulomb blockade thermometers below 4 mK. Above 7 mK the devices are in good thermal contact with the environment, well isolated from electrical noise, and not susceptible to self-heating. This is attributed to an optimised design that incorporates cooling fins with a high electron-phonon coupling and on-chip electronic filters, combined with a low-noise electronic measurement setup. Below 7 mK the electron temperature is seen to diverge from the ambient temperature. By immersing a Coulomb Blockade Thermometer in the 3He/4He refrigerant of a","authors_text":"D. Gunnarsson, D. I. Bradley, H. Heikkinen, J. Penttil\\\"a, J. R. Prance, L. Roschier, M. Prunnila, M. Sarsby, R. E. George, R. P. Haley, Yu. A. Pashkin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-27T09:47:14Z","title":"Nanoelectronic thermometers optimised for sub-10 millikelvin operation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.07244","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":"sha256:42ae878142e58c4f64824d928805329c119ffa333a6ed7c302ba23724142e7f7","target":"record","created_at":"2026-05-18T01:19:12Z","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":"ec589c1da36929e32fc56393417af78e6073f4e09b7465c27ceebc76dfff6cfd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-27T09:47:14Z","title_canon_sha256":"df48d3d71607f62422b84301d9fd1ede81f99bef28ad1538efa1dbf725548fdd"},"schema_version":"1.0","source":{"id":"1505.07244","kind":"arxiv","version":2}},"canonical_sha256":"069a01fdf321c64b64d2ad8a608ad2107f7d7eaed369ad349f21ca21445f1a9e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"069a01fdf321c64b64d2ad8a608ad2107f7d7eaed369ad349f21ca21445f1a9e","first_computed_at":"2026-05-18T01:19:12.195034Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:12.195034Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pdEcNiD/tHaKM5yROnI+MX4KWaxrKBkkZ5tIyaz5gdpDlTl/neF+Dp2M0UFDHw9pGXLMaNdSqWNtnZtMpdpgDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:12.195641Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.07244","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:42ae878142e58c4f64824d928805329c119ffa333a6ed7c302ba23724142e7f7","sha256:ef71cc20a3426bf8a03613de5fc3fb0d778ac9729df8c5d4cb05a06b5e5dc2ee"],"state_sha256":"c9d9fa250de36748f90d6d632caeda68d98e4eb2a9a96881d4aa195341152fea"}