{"paper":{"title":"Experimental Demonstration of a Measurement-Feedback Quantum Information Engine","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Dehua Liu, Gang Chen, Jianhui Wang, Jinfeng Wei, Jintao Bu, Kaifeng Cui, Leilei Yan, Xi Wang, Yiling Zhan, Yingying Hong, Zhe Wang","submitted_at":"2026-07-30T13:47:32Z","abstract_excerpt":"Harnessing quantum inner friction in a finite-time stroke of quantum engine to extract work remains an open experimental challenge. Here we address this issue by experimentally establishing and demonstrating an innovative measurement-feedback quantum information engine model in the trapped 40Ca+ ion system, where the projective measurement replaces the hot reservoir as a nonthermal energy source and feedback-control conditionally steers the system through either unitary compression-expansion strokes or thermalization. We experimentally show that the engine, starting from arbitrary initial stat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.28702","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2607.28702/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}