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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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