{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:UA5TW7BYMFXHL3HOAPENROXVOT","short_pith_number":"pith:UA5TW7BY","canonical_record":{"source":{"id":"1707.07295","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-07-23T13:32:36Z","cross_cats_sorted":[],"title_canon_sha256":"488b4821d95d1ccb29f0fee6a4bb7b563acb0cbb07e35296d31eee0f3d1fe387","abstract_canon_sha256":"cfa331c9be75e646a248c02a5044e8848033ac649cec4eb36db552bbe11be93c"},"schema_version":"1.0"},"canonical_sha256":"a03b3b7c38616e75ecee03c8d8baf574c70fabd8370c85fb35af6b38aefdb526","source":{"kind":"arxiv","id":"1707.07295","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.07295","created_at":"2026-05-18T00:14:16Z"},{"alias_kind":"arxiv_version","alias_value":"1707.07295v3","created_at":"2026-05-18T00:14:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.07295","created_at":"2026-05-18T00:14:16Z"},{"alias_kind":"pith_short_12","alias_value":"UA5TW7BYMFXH","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"UA5TW7BYMFXHL3HO","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"UA5TW7BY","created_at":"2026-05-18T12:31:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:UA5TW7BYMFXHL3HOAPENROXVOT","target":"record","payload":{"canonical_record":{"source":{"id":"1707.07295","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-07-23T13:32:36Z","cross_cats_sorted":[],"title_canon_sha256":"488b4821d95d1ccb29f0fee6a4bb7b563acb0cbb07e35296d31eee0f3d1fe387","abstract_canon_sha256":"cfa331c9be75e646a248c02a5044e8848033ac649cec4eb36db552bbe11be93c"},"schema_version":"1.0"},"canonical_sha256":"a03b3b7c38616e75ecee03c8d8baf574c70fabd8370c85fb35af6b38aefdb526","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:14:16.405632Z","signature_b64":"ZCyMqYGdWydDUeYnBS+D4LEm6PpKjzcxlOmBzh+Ldhk338mJwgghUA+birw1Kt+kZm9V7gnaV+xzx0RnRPkjCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a03b3b7c38616e75ecee03c8d8baf574c70fabd8370c85fb35af6b38aefdb526","last_reissued_at":"2026-05-18T00:14:16.405166Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:14:16.405166Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.07295","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:14:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V9aCw6v8HxfJ/myhWf/Fyuz2cB2wyRzvUfyEe+VtYJpZKFCdzvZLeGorEw0+TNmW6mDULG7DLdDTGpXCpXX5AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T19:08:26.422274Z"},"content_sha256":"fd598f44dc7f482350b69e7a67b3821385195ff2fc51a386eb8e41123f0d94e3","schema_version":"1.0","event_id":"sha256:fd598f44dc7f482350b69e7a67b3821385195ff2fc51a386eb8e41123f0d94e3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:UA5TW7BYMFXHL3HOAPENROXVOT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nonequilibrium quantum absorption refrigerator","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Fu-Lin Zhang, Jian-Ying Du","submitted_at":"2017-07-23T13:32:36Z","abstract_excerpt":"We study a quantum absorption refrigerator, in which a target qubit is cooled by two machine qubits in a nonequilibrium steady state. It is realized by a strong internal coupling in the two-qubit fridge and a vanishing tripartite interaction among the whole system. The coherence of a \\emph{machine virtual qubit} is investigated as quantumness of the fridge. A necessary condition for cooling shows that the quantum coherence is beneficial to the nonequilibrium fridge, while it is detrimental as far as the maximum coefficient of performance (COP) and the COP at maximum power are concerned. Here, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.07295","kind":"arxiv","version":3},"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":"2026-05-18T00:14:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Und6G2J8F2MuyoWMyGw+y2zCcReBtQIT4fjqsL5SHIOR3JvzEtpP668aLz3LZMy15woVTSLDAhhow0+U29NaCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T19:08:26.422957Z"},"content_sha256":"24a7ccf5913cff7fe6e45a391d233f74bc138731d5e95eee32c1196c500ba444","schema_version":"1.0","event_id":"sha256:24a7ccf5913cff7fe6e45a391d233f74bc138731d5e95eee32c1196c500ba444"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UA5TW7BYMFXHL3HOAPENROXVOT/bundle.json","state_url":"https://pith.science/pith/UA5TW7BYMFXHL3HOAPENROXVOT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UA5TW7BYMFXHL3HOAPENROXVOT/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":"2026-06-07T19:08:26Z","links":{"resolver":"https://pith.science/pith/UA5TW7BYMFXHL3HOAPENROXVOT","bundle":"https://pith.science/pith/UA5TW7BYMFXHL3HOAPENROXVOT/bundle.json","state":"https://pith.science/pith/UA5TW7BYMFXHL3HOAPENROXVOT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UA5TW7BYMFXHL3HOAPENROXVOT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:UA5TW7BYMFXHL3HOAPENROXVOT","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":"cfa331c9be75e646a248c02a5044e8848033ac649cec4eb36db552bbe11be93c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-07-23T13:32:36Z","title_canon_sha256":"488b4821d95d1ccb29f0fee6a4bb7b563acb0cbb07e35296d31eee0f3d1fe387"},"schema_version":"1.0","source":{"id":"1707.07295","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.07295","created_at":"2026-05-18T00:14:16Z"},{"alias_kind":"arxiv_version","alias_value":"1707.07295v3","created_at":"2026-05-18T00:14:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.07295","created_at":"2026-05-18T00:14:16Z"},{"alias_kind":"pith_short_12","alias_value":"UA5TW7BYMFXH","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"UA5TW7BYMFXHL3HO","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"UA5TW7BY","created_at":"2026-05-18T12:31:46Z"}],"graph_snapshots":[{"event_id":"sha256:24a7ccf5913cff7fe6e45a391d233f74bc138731d5e95eee32c1196c500ba444","target":"graph","created_at":"2026-05-18T00:14:16Z","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 study a quantum absorption refrigerator, in which a target qubit is cooled by two machine qubits in a nonequilibrium steady state. It is realized by a strong internal coupling in the two-qubit fridge and a vanishing tripartite interaction among the whole system. The coherence of a \\emph{machine virtual qubit} is investigated as quantumness of the fridge. A necessary condition for cooling shows that the quantum coherence is beneficial to the nonequilibrium fridge, while it is detrimental as far as the maximum coefficient of performance (COP) and the COP at maximum power are concerned. Here, ","authors_text":"Fu-Lin Zhang, Jian-Ying Du","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-07-23T13:32:36Z","title":"Nonequilibrium quantum absorption refrigerator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.07295","kind":"arxiv","version":3},"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:fd598f44dc7f482350b69e7a67b3821385195ff2fc51a386eb8e41123f0d94e3","target":"record","created_at":"2026-05-18T00:14:16Z","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":"cfa331c9be75e646a248c02a5044e8848033ac649cec4eb36db552bbe11be93c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-07-23T13:32:36Z","title_canon_sha256":"488b4821d95d1ccb29f0fee6a4bb7b563acb0cbb07e35296d31eee0f3d1fe387"},"schema_version":"1.0","source":{"id":"1707.07295","kind":"arxiv","version":3}},"canonical_sha256":"a03b3b7c38616e75ecee03c8d8baf574c70fabd8370c85fb35af6b38aefdb526","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a03b3b7c38616e75ecee03c8d8baf574c70fabd8370c85fb35af6b38aefdb526","first_computed_at":"2026-05-18T00:14:16.405166Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:14:16.405166Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZCyMqYGdWydDUeYnBS+D4LEm6PpKjzcxlOmBzh+Ldhk338mJwgghUA+birw1Kt+kZm9V7gnaV+xzx0RnRPkjCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:14:16.405632Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.07295","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd598f44dc7f482350b69e7a67b3821385195ff2fc51a386eb8e41123f0d94e3","sha256:24a7ccf5913cff7fe6e45a391d233f74bc138731d5e95eee32c1196c500ba444"],"state_sha256":"d8ba2a4d873ada849ba54630649271577125608701b821097628f83804c1e400"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7RnCcKhY8IdOqa7yn+r44yw50l9gvdSv21mtWss3HdQIQo398UY7DOcpwuBuWpWORUyq75oYjzfXFrQN6xPoCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T19:08:26.426521Z","bundle_sha256":"87ce6fd560bfbe5ccca0e2eccdf152892b2fd1f7ee9ec59cb4f35e9d1925ed14"}}