{"title":"Correlated quantum machines beyond the standard second law","authors":"Milton Aguilar, Eric Lutz","doi":"arxiv-2409.07899","DOIUrl":null,"url":null,"abstract":"The laws of thermodynamics strongly restrict the performance of thermal\nmachines. Standard thermodynamics, initially developed for uncorrelated\nmacroscopic systems, does not hold for microscopic systems correlated with\ntheir environments. We here derive exact generalized laws of quantum\nthermodynamics for arbitrary, time-periodic, open systems that account for all\npossible correlations between all involved parties. We demonstrate the\nexistence of two basic modes of engine operation: the usual thermal case, where\nheat is converted into work, and a novel athermal regime, where work is\nextracted from entropic resources, such as system-bath correlations. In the\nlatter regime, the efficiency of a quantum engine is not bounded by the usual\nCarnot formula. Our results provide a unified formalism to determine the\nefficiency of correlated microscopic thermal devices.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"241 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Quantum Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.07899","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The laws of thermodynamics strongly restrict the performance of thermal
machines. Standard thermodynamics, initially developed for uncorrelated
macroscopic systems, does not hold for microscopic systems correlated with
their environments. We here derive exact generalized laws of quantum
thermodynamics for arbitrary, time-periodic, open systems that account for all
possible correlations between all involved parties. We demonstrate the
existence of two basic modes of engine operation: the usual thermal case, where
heat is converted into work, and a novel athermal regime, where work is
extracted from entropic resources, such as system-bath correlations. In the
latter regime, the efficiency of a quantum engine is not bounded by the usual
Carnot formula. Our results provide a unified formalism to determine the
efficiency of correlated microscopic thermal devices.