{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:TFSYY5QD6X4QONP27YLNY2S7YO","short_pith_number":"pith:TFSYY5QD","canonical_record":{"source":{"id":"1402.6447","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2014-02-26T08:13:14Z","cross_cats_sorted":[],"title_canon_sha256":"d146273ef84ded0723219585765535f5ed581bf9cef2ee8cfe8c77073d380ef5","abstract_canon_sha256":"072a31e30e16a23e28f6c56259ec2eda53f61cc35babca256e4d14e115f63937"},"schema_version":"1.0"},"canonical_sha256":"99658c7603f5f90735fafe16dc6a5fc3820d4c590edb4fa1a51baf114fdd1b39","source":{"kind":"arxiv","id":"1402.6447","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.6447","created_at":"2026-05-18T01:44:27Z"},{"alias_kind":"arxiv_version","alias_value":"1402.6447v2","created_at":"2026-05-18T01:44:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.6447","created_at":"2026-05-18T01:44:27Z"},{"alias_kind":"pith_short_12","alias_value":"TFSYY5QD6X4Q","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"TFSYY5QD6X4QONP2","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"TFSYY5QD","created_at":"2026-05-18T12:28:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:TFSYY5QD6X4QONP27YLNY2S7YO","target":"record","payload":{"canonical_record":{"source":{"id":"1402.6447","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2014-02-26T08:13:14Z","cross_cats_sorted":[],"title_canon_sha256":"d146273ef84ded0723219585765535f5ed581bf9cef2ee8cfe8c77073d380ef5","abstract_canon_sha256":"072a31e30e16a23e28f6c56259ec2eda53f61cc35babca256e4d14e115f63937"},"schema_version":"1.0"},"canonical_sha256":"99658c7603f5f90735fafe16dc6a5fc3820d4c590edb4fa1a51baf114fdd1b39","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:44:27.014348Z","signature_b64":"7i3G0XZgOL9+yJwAB35/UiWH/f/Ts8bK2Ph5EnoAJ3npPV/pJ4XuS7QEOWXuq/Kr8iVGCIJhqDhiDM2ALbdnCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"99658c7603f5f90735fafe16dc6a5fc3820d4c590edb4fa1a51baf114fdd1b39","last_reissued_at":"2026-05-18T01:44:27.013986Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:44:27.013986Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1402.6447","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":"2026-05-18T01:44:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bskLNVehMASvFcbJICgK8l3yA7C74CpJRJeS5m0JQmS9DuOFcC7l+S5yyO9+88UihTteYcehYVOlp29dmKezBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T13:20:14.916304Z"},"content_sha256":"5fef5366c7729a1ab38bda26f302eda1018c041fc8844bdd93860df761d57fcb","schema_version":"1.0","event_id":"sha256:5fef5366c7729a1ab38bda26f302eda1018c041fc8844bdd93860df761d57fcb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:TFSYY5QD6X4QONP27YLNY2S7YO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Coefficient of performance at maximum \\chi-criterion for Feynman ratchet as a refrigerator","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.stat-mech","authors_text":"Pan Yang, Shiqi Sheng, Z.C. Tu","submitted_at":"2014-02-26T08:13:14Z","abstract_excerpt":"The \\chi-criterion is defined as the product of the energy conversion efficiency and the heat absorbed per-unit-time by the working substance [de Tom\\'as et al., Phys. Rev. E, 85 (2012) 010104(R)]. The \\chi-criterion for Feynman ratchet as a refrigerator operating between two heat baths is optimized. Asymptotic solutions of the coefficient of performance at maximum \\chi-criterion for Feynman ratchet are investigated at both large and small temperature difference. An interpolation formula, which fits the numerical solution very well, is proposed. Besides, the sufficient condition for the univer"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.6447","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":"2026-05-18T01:44:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S4MxBPIvyplVlw03l097u0+dX3GnwNn7Fbu0Rd6sJxp6Pr9OE5YWsvqCGeJUEiVwor1TfjWkCjmxLlnCVP2ODw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T13:20:14.916673Z"},"content_sha256":"55ad27d57b7bcfda0b1fe5ab704302ba218d10da48645aecc447eff6d4a8669a","schema_version":"1.0","event_id":"sha256:55ad27d57b7bcfda0b1fe5ab704302ba218d10da48645aecc447eff6d4a8669a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TFSYY5QD6X4QONP27YLNY2S7YO/bundle.json","state_url":"https://pith.science/pith/TFSYY5QD6X4QONP27YLNY2S7YO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TFSYY5QD6X4QONP27YLNY2S7YO/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":"2026-06-22T13:20:14Z","links":{"resolver":"https://pith.science/pith/TFSYY5QD6X4QONP27YLNY2S7YO","bundle":"https://pith.science/pith/TFSYY5QD6X4QONP27YLNY2S7YO/bundle.json","state":"https://pith.science/pith/TFSYY5QD6X4QONP27YLNY2S7YO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TFSYY5QD6X4QONP27YLNY2S7YO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:TFSYY5QD6X4QONP27YLNY2S7YO","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":"072a31e30e16a23e28f6c56259ec2eda53f61cc35babca256e4d14e115f63937","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2014-02-26T08:13:14Z","title_canon_sha256":"d146273ef84ded0723219585765535f5ed581bf9cef2ee8cfe8c77073d380ef5"},"schema_version":"1.0","source":{"id":"1402.6447","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.6447","created_at":"2026-05-18T01:44:27Z"},{"alias_kind":"arxiv_version","alias_value":"1402.6447v2","created_at":"2026-05-18T01:44:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.6447","created_at":"2026-05-18T01:44:27Z"},{"alias_kind":"pith_short_12","alias_value":"TFSYY5QD6X4Q","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"TFSYY5QD6X4QONP2","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"TFSYY5QD","created_at":"2026-05-18T12:28:49Z"}],"graph_snapshots":[{"event_id":"sha256:55ad27d57b7bcfda0b1fe5ab704302ba218d10da48645aecc447eff6d4a8669a","target":"graph","created_at":"2026-05-18T01:44:27Z","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":"The \\chi-criterion is defined as the product of the energy conversion efficiency and the heat absorbed per-unit-time by the working substance [de Tom\\'as et al., Phys. Rev. E, 85 (2012) 010104(R)]. The \\chi-criterion for Feynman ratchet as a refrigerator operating between two heat baths is optimized. Asymptotic solutions of the coefficient of performance at maximum \\chi-criterion for Feynman ratchet are investigated at both large and small temperature difference. An interpolation formula, which fits the numerical solution very well, is proposed. Besides, the sufficient condition for the univer","authors_text":"Pan Yang, Shiqi Sheng, Z.C. Tu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2014-02-26T08:13:14Z","title":"Coefficient of performance at maximum \\chi-criterion for Feynman ratchet as a refrigerator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.6447","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":"sha256:5fef5366c7729a1ab38bda26f302eda1018c041fc8844bdd93860df761d57fcb","target":"record","created_at":"2026-05-18T01:44:27Z","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":"072a31e30e16a23e28f6c56259ec2eda53f61cc35babca256e4d14e115f63937","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2014-02-26T08:13:14Z","title_canon_sha256":"d146273ef84ded0723219585765535f5ed581bf9cef2ee8cfe8c77073d380ef5"},"schema_version":"1.0","source":{"id":"1402.6447","kind":"arxiv","version":2}},"canonical_sha256":"99658c7603f5f90735fafe16dc6a5fc3820d4c590edb4fa1a51baf114fdd1b39","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99658c7603f5f90735fafe16dc6a5fc3820d4c590edb4fa1a51baf114fdd1b39","first_computed_at":"2026-05-18T01:44:27.013986Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:27.013986Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7i3G0XZgOL9+yJwAB35/UiWH/f/Ts8bK2Ph5EnoAJ3npPV/pJ4XuS7QEOWXuq/Kr8iVGCIJhqDhiDM2ALbdnCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:27.014348Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.6447","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5fef5366c7729a1ab38bda26f302eda1018c041fc8844bdd93860df761d57fcb","sha256:55ad27d57b7bcfda0b1fe5ab704302ba218d10da48645aecc447eff6d4a8669a"],"state_sha256":"22210bab4ef528ec26d2b3f3760dd506ba77d4f38875287d352837d0c3a2467d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TSx/CO4UofUHJKfsykQDuVRRcrFkz8bmlFnozNY0IS+TudfAPSikS5P6SnqXUCIWUVp+pi33BUCO31RSKyyQAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-22T13:20:14.918635Z","bundle_sha256":"d5a774dc7bb6bb53c6c7330d84de6f72fc56aa5ca525d478bfd550e19a97c641"}}