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Impact of nonideal cycles on the efficiency of quantum heat engines

Ramezani, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1140/epjd/e2019-90520-7
  3. Publisher: Springer New York LLC , 2019
  4. Abstract:
  5. Abstract: Given a quantum heat engine that operates in a cycle that reaches maximal efficiency for a time-dependent Hamiltonian H(τ) of the working substance, with overall controllable driving H(τ) = g(τ) H, we study the deviation of the efficiency from the optimal value due to a generic time-independent perturbation in the Hamiltonian. We show that for a working substance consisting of two two-level systems, by suitably tuning the interaction, the deviation can be suppressed up to the third order in the perturbation parameter – and thus almost retaining the optimality of the engine. Graphical abstract: [Figure not available: see fulltext.]. © 2019, EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature
  6. Keywords:
  7. Topical issue
  8. Source: European Physical Journal D ; Volume 73, Issue 7 , 2019 ; 14346060 (ISSN)
  9. URL: https://link.springer.com/article/10.1140/epjd/e2019-90520-7