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Superadiabatic quantum heat engine with a multiferroic working medium.

L Chotorlishvili1, M Azimi1, S Stagraczyński1

  • 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany.

Physical Review. E
|October 15, 2016
PubMed
Summary
This summary is machine-generated.

This study introduces an efficient quantum thermodynamic cycle using a chiral multiferroic material. Electric fields control the cycle, enabling electromagnetic work and demonstrating a reversible, high-output power system.

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Area of Science:

  • Quantum Thermodynamics
  • Condensed Matter Physics
  • Materials Science

Background:

  • Quantum thermodynamic cycles offer efficient energy conversion.
  • Chiral multiferroic materials exhibit unique magnetoelectric coupling.
  • Shortcuts to adiabaticity enable finite-time quantum processes.

Purpose of the Study:

  • To present a quantum thermodynamic cycle utilizing a chiral multiferroic working substance.
  • To explore the control of the cycle using external electric fields.
  • To investigate the role of spin ordering and entanglement on cycle performance.

Main Methods:

  • Theoretical modeling of a quantum thermodynamic cycle.
  • Application of shortcuts to adiabaticity for efficiency.
  • Utilizing Lindblad master equation to analyze thermal relaxations.
  • Investigating magnetoelectric coupling in LiCu_{2}O_{2}.

Main Results:

  • Demonstrated electric-field control of the quantum thermodynamic cycle via magnetoelectric coupling.
  • Identified electromagnetic work and its fluctuations.
  • Observed nonmonotonic behavior in irreversible work and output power.
  • Showcased cycle reversibility and inherent maximal output power.

Conclusions:

  • Chiral multiferroics provide a viable platform for efficient quantum thermodynamic cycles.
  • Electric field control offers a novel method for manipulating quantum cycles.
  • Entanglement in spin order acts as a resource for enhancing cycle performance.