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Related Concept Videos

Heat Engines01:10

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Fabrication and Characterization of Superconducting Resonators
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Quantum heat engine with coupled superconducting resonators.

Ali Ü C Hardal1,2, Nur Aslan1, C M Wilson3

  • 1Department of Physics, Koç University, Sarıyer, İstanbul, 34450, Turkey.

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|January 20, 2018
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Summary
This summary is machine-generated.

We introduce a novel quantum heat engine using superconducting resonators. This engine demonstrates a quantum enhancement in power output at low temperatures, offering a new avenue for quantum thermodynamics research.

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Area of Science:

  • Quantum thermodynamics
  • Solid-state physics
  • Superconducting circuits

Background:

  • Quantum heat engines are theoretical devices that leverage quantum mechanical effects to improve thermodynamic performance.
  • Superconducting circuits offer a promising platform for realizing quantum phenomena due to their controllable quantum states and scalability.
  • Optomechanical systems, traditionally involving light and mechanical motion, provide a framework for understanding energy conversion.

Purpose of the Study:

  • To propose and theoretically analyze a novel quantum heat engine based on coupled superconducting resonators.
  • To investigate the thermodynamic properties and power output of this system.
  • To explore the quantum and classical differences in the system's behavior and identify signatures of quantum enhancement.

Main Methods:

  • Utilizing two coupled superconducting transmission line resonators with an optomechanical-like interaction.
  • Employing a thermal pump to incoherently drive one resonator, inducing coherent oscillations in the other.
  • Solving both the quantum master equation and classical Langevin equations to compare system dynamics.
  • Calculating key thermodynamic quantities such as entropy, temperature, power, and mean energy.

Main Results:

  • A limit cycle was observed in the thermodynamical phase space, indicating a finite power output.
  • The system functions as an all-electrical analog to a photonic piston, generating power via electrical charging.
  • Quantum and classical descriptions revealed distinct behaviors, with evidence of quantum enhancement in power output at low temperatures.

Conclusions:

  • The proposed superconducting resonator system effectively functions as a quantum heat engine.
  • Quantum effects lead to enhanced power output at low temperatures, surpassing classical predictions.
  • This work provides a new platform for exploring quantum thermodynamics with all-electrical control.