{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:ZX56ZS7RNBVXXUQSL7SNO6TA6D","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":"3250a111ec67810f40760f363db4c53c55c71f0e4b712c6a9e9fe64bb5c69342","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-10-16T13:02:23Z","title_canon_sha256":"da871c45a818c23086c39fadd03534f5c6893eb041736267a5fb4ecd07b4baaf"},"schema_version":"1.0","source":{"id":"1210.4394","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.4394","created_at":"2026-05-18T01:11:27Z"},{"alias_kind":"arxiv_version","alias_value":"1210.4394v1","created_at":"2026-05-18T01:11:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.4394","created_at":"2026-05-18T01:11:27Z"},{"alias_kind":"pith_short_12","alias_value":"ZX56ZS7RNBVX","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"ZX56ZS7RNBVXXUQS","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"ZX56ZS7R","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:78acc24342a4cf1b0573e6c709045075084aba66c372f3c5f0a6d1cfad288bd0","target":"graph","created_at":"2026-05-18T01:11:27Z","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":"In this paper we prove that a fundamental constraint on the cooling dynamic implies that it is impossible to cool, via a unitary system-bath quantum evolution, a system that is embedded in a thermal environment down to its ground state, if the initial state is a factorized product of system and bath states. The latter is a crucial but artificial assumption often included in many descriptions of system-bath dynamics. The analogous conclusion holds for 'cooling' to any pure state of the system.","authors_text":"Dvira Segal, Lian-Ao Wu, Paul Brumer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-10-16T13:02:23Z","title":"Ground state cooling is not possible given initial system-thermal bath factorization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.4394","kind":"arxiv","version":1},"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:d064b4a82c8e4b30f93cf33e03b488c2f163b62a54945100a13c3ce787e6d38f","target":"record","created_at":"2026-05-18T01:11:27Z","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":"3250a111ec67810f40760f363db4c53c55c71f0e4b712c6a9e9fe64bb5c69342","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-10-16T13:02:23Z","title_canon_sha256":"da871c45a818c23086c39fadd03534f5c6893eb041736267a5fb4ecd07b4baaf"},"schema_version":"1.0","source":{"id":"1210.4394","kind":"arxiv","version":1}},"canonical_sha256":"cdfbeccbf1686b7bd2125fe4d77a60f0cf67a20eca8d53d38390ce430e586ce1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cdfbeccbf1686b7bd2125fe4d77a60f0cf67a20eca8d53d38390ce430e586ce1","first_computed_at":"2026-05-18T01:11:27.712659Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:27.712659Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"09L6RChQ5U79uwvpMuQOnvc051MBPGUSDtP/fv/jbJlS7F9K5qkfFXfsVzTws4riF8j66+WiwKr8YSEMbHptCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:27.713256Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.4394","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d064b4a82c8e4b30f93cf33e03b488c2f163b62a54945100a13c3ce787e6d38f","sha256:78acc24342a4cf1b0573e6c709045075084aba66c372f3c5f0a6d1cfad288bd0"],"state_sha256":"74bdb4ccf958faeb74216f2c8a17b46331654e49e252427c16ec30c46b913825"}