{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:HLDDOAP4FPYSNXGLGSSCDK2MT5","short_pith_number":"pith:HLDDOAP4","canonical_record":{"source":{"id":"1402.5872","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-02-24T16:09:37Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"287837cb67fe683b03494b43f030a6910ed873c1aed87d4a22543c9a3d938ecf","abstract_canon_sha256":"a094daef34c1814cd46377edd6e7a26eace459146d2604f33372ef6fc0ebadbe"},"schema_version":"1.0"},"canonical_sha256":"3ac63701fc2bf126dccb34a421ab4c9f5290d5c70b84ac8da08ef518e6bda0a0","source":{"kind":"arxiv","id":"1402.5872","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.5872","created_at":"2026-05-18T02:38:29Z"},{"alias_kind":"arxiv_version","alias_value":"1402.5872v2","created_at":"2026-05-18T02:38:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.5872","created_at":"2026-05-18T02:38:29Z"},{"alias_kind":"pith_short_12","alias_value":"HLDDOAP4FPYS","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"HLDDOAP4FPYSNXGL","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"HLDDOAP4","created_at":"2026-05-18T12:28:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:HLDDOAP4FPYSNXGLGSSCDK2MT5","target":"record","payload":{"canonical_record":{"source":{"id":"1402.5872","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-02-24T16:09:37Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"287837cb67fe683b03494b43f030a6910ed873c1aed87d4a22543c9a3d938ecf","abstract_canon_sha256":"a094daef34c1814cd46377edd6e7a26eace459146d2604f33372ef6fc0ebadbe"},"schema_version":"1.0"},"canonical_sha256":"3ac63701fc2bf126dccb34a421ab4c9f5290d5c70b84ac8da08ef518e6bda0a0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:38:29.732829Z","signature_b64":"7Rat4g6jxoIfsR8DNA8qCopV5uxISENnZqvua4NMMHIsQ93GB7p6T6wA9iUjIHvoNlKFHxXCfHtPI67GWhiFDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ac63701fc2bf126dccb34a421ab4c9f5290d5c70b84ac8da08ef518e6bda0a0","last_reissued_at":"2026-05-18T02:38:29.732356Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:38:29.732356Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1402.5872","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:38:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XLtvqEgPunLWVNC5oIzJdIbaysyq0RJHlpduTKYYVx7zAFUihjQRr/4CFB8yMPM0hVtU7kHy2q0ZQIiAIGi/CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T22:04:54.270988Z"},"content_sha256":"6fa564f8978170b1e0b960837a8665e17a85bb761e7f5c5766a8b1b2c8928f36","schema_version":"1.0","event_id":"sha256:6fa564f8978170b1e0b960837a8665e17a85bb761e7f5c5766a8b1b2c8928f36"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:HLDDOAP4FPYSNXGLGSSCDK2MT5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sub-50 mK electronic cooling with large-area superconducting tunnel junctions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.mes-hall","authors_text":"H. Courtois, H. Q. Nguyen, J. P. Pekola, M. Meschke","submitted_at":"2014-02-24T16:09:37Z","abstract_excerpt":"In electronic cooling with superconducting tunnel junctions, the cooling power is counterbalanced by the interaction with phonons and by the heat flow from the overheated leads. We study aluminium-based coolers that are equipped with a suspended normal metal and an efficient quasi-particle drain. At intermediate temperatures, the phonon bath of the suspended normal metal is cooled. At lower temperatures, by adjusting the junction transparency, we control the injection current, and thus the superconductor temperature. The device shows a strong cooling from 150 mK down to about 30 mK, a factor o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.5872","kind":"arxiv","version":2},"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":"2026-05-18T02:38:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mFfe96+dkf/MTdh/qsLAaa8fqqFrE6Gp7Xjz7Pv94W0EdfyB8bQhHTkaYdHkVexX/Hp26mQI8FAH1yxeTzNvCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T22:04:54.271724Z"},"content_sha256":"1191fc929728b56252ad34913f52566b873e81bfcacc7345e161ffdb687df892","schema_version":"1.0","event_id":"sha256:1191fc929728b56252ad34913f52566b873e81bfcacc7345e161ffdb687df892"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HLDDOAP4FPYSNXGLGSSCDK2MT5/bundle.json","state_url":"https://pith.science/pith/HLDDOAP4FPYSNXGLGSSCDK2MT5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HLDDOAP4FPYSNXGLGSSCDK2MT5/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":"2026-06-05T22:04:54Z","links":{"resolver":"https://pith.science/pith/HLDDOAP4FPYSNXGLGSSCDK2MT5","bundle":"https://pith.science/pith/HLDDOAP4FPYSNXGLGSSCDK2MT5/bundle.json","state":"https://pith.science/pith/HLDDOAP4FPYSNXGLGSSCDK2MT5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HLDDOAP4FPYSNXGLGSSCDK2MT5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:HLDDOAP4FPYSNXGLGSSCDK2MT5","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":"a094daef34c1814cd46377edd6e7a26eace459146d2604f33372ef6fc0ebadbe","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-02-24T16:09:37Z","title_canon_sha256":"287837cb67fe683b03494b43f030a6910ed873c1aed87d4a22543c9a3d938ecf"},"schema_version":"1.0","source":{"id":"1402.5872","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.5872","created_at":"2026-05-18T02:38:29Z"},{"alias_kind":"arxiv_version","alias_value":"1402.5872v2","created_at":"2026-05-18T02:38:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.5872","created_at":"2026-05-18T02:38:29Z"},{"alias_kind":"pith_short_12","alias_value":"HLDDOAP4FPYS","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"HLDDOAP4FPYSNXGL","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"HLDDOAP4","created_at":"2026-05-18T12:28:30Z"}],"graph_snapshots":[{"event_id":"sha256:1191fc929728b56252ad34913f52566b873e81bfcacc7345e161ffdb687df892","target":"graph","created_at":"2026-05-18T02:38:29Z","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":"In electronic cooling with superconducting tunnel junctions, the cooling power is counterbalanced by the interaction with phonons and by the heat flow from the overheated leads. We study aluminium-based coolers that are equipped with a suspended normal metal and an efficient quasi-particle drain. At intermediate temperatures, the phonon bath of the suspended normal metal is cooled. At lower temperatures, by adjusting the junction transparency, we control the injection current, and thus the superconductor temperature. The device shows a strong cooling from 150 mK down to about 30 mK, a factor o","authors_text":"H. Courtois, H. Q. Nguyen, J. P. Pekola, M. Meschke","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-02-24T16:09:37Z","title":"Sub-50 mK electronic cooling with large-area superconducting tunnel junctions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.5872","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":"sha256:6fa564f8978170b1e0b960837a8665e17a85bb761e7f5c5766a8b1b2c8928f36","target":"record","created_at":"2026-05-18T02:38:29Z","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":"a094daef34c1814cd46377edd6e7a26eace459146d2604f33372ef6fc0ebadbe","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-02-24T16:09:37Z","title_canon_sha256":"287837cb67fe683b03494b43f030a6910ed873c1aed87d4a22543c9a3d938ecf"},"schema_version":"1.0","source":{"id":"1402.5872","kind":"arxiv","version":2}},"canonical_sha256":"3ac63701fc2bf126dccb34a421ab4c9f5290d5c70b84ac8da08ef518e6bda0a0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ac63701fc2bf126dccb34a421ab4c9f5290d5c70b84ac8da08ef518e6bda0a0","first_computed_at":"2026-05-18T02:38:29.732356Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:38:29.732356Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7Rat4g6jxoIfsR8DNA8qCopV5uxISENnZqvua4NMMHIsQ93GB7p6T6wA9iUjIHvoNlKFHxXCfHtPI67GWhiFDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:38:29.732829Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.5872","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6fa564f8978170b1e0b960837a8665e17a85bb761e7f5c5766a8b1b2c8928f36","sha256:1191fc929728b56252ad34913f52566b873e81bfcacc7345e161ffdb687df892"],"state_sha256":"324cab00496499317928ed73f586a77c2b646a3531a36363636b1f81991324bf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hWx9Xp/w0ffgk1LSDatN7rpdHO49F5Na85We6yf5LjBczLEUrvL+fWIbWckCsermy/lqiSfta+23pQ58dhXjCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T22:04:54.275446Z","bundle_sha256":"f5abb643a80d2aba0477eea234da7dca9dc8275c5982626b93a2c5a631c8adba"}}