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IPM
30
YEARS OLD

“School of Physic”

Paper   IPM / Physic / 15973
   School of Physics
  Title: Impact of nonideal cycles on the efficiency of quantum heat engines
  Author(s):
1 . M. Ramezani
2 . S. Marcantoni
3 . F. Benatti
4 . R. Floreanini
5 . F. Petiziol
6 . A.T. Rezakhani
7 . M. Golshani
  Status: Published
  Journal: Eur. Phys. J. D
  Vol.: 73
  Year: 2019
  Pages: 144
  Supported by: IPM
  Abstract:
Given a quantum heat engine that operates in a cycle that reaches maximal efficiency for a time-dependent Hamiltonian H(t) of the working substance, with overall controllable driving H(t) = g(t) 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.

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