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Hybrid quantum thermal machines with dynamical couplings.

Fabio Cavaliere1,2, Luca Razzoli3,4, Matteo Carrega2

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This study presents a versatile quantum thermal machine capable of performing multiple tasks simultaneously. Its operational modes, including efficient hybrid functions and transistor applications, are tunable via driving frequency.

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Area of Science:

  • Quantum thermodynamics
  • Quantum information science
  • Solid-state physics

Background:

  • Quantum thermal machines offer novel functionalities beyond classical counterparts.
  • Hybrid machines performing multiple tasks simultaneously are crucial for advanced quantum technologies.
  • Controlling quantum systems with external drives is key to manipulating their thermodynamic properties.

Purpose of the Study:

  • To characterize and optimize a three-terminal quantum thermal machine.
  • To explore its capability for simultaneous tasks (hybrid mode) and single tasks (pure mode).
  • To investigate its potential as a quantum transistor.

Main Methods:

  • Modeling a quantum harmonic oscillator coupled to three heat baths.
  • Applying periodic driving to two of the couplings.
  • Analyzing the machine's performance across different driving frequencies.

Main Results:

  • Efficient operation in both pure and hybrid modes was demonstrated.
  • Switching between operational modes by altering driving frequency was achieved.
  • The setup exhibited high-performance transistor characteristics.

Conclusions:

  • The proposed quantum thermal machine is versatile and tunable.
  • It enables efficient engineering of thermodynamic tasks and thermal management in quantum systems.
  • The ability to switch modes and function as a transistor highlights its practical potential.