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Simulating Finite-Time Isothermal Processes with Superconducting Quantum Circuits.

Jin-Fu Chen1,2, Ying Li2, Hui Dong2

  • 1Beijing Computational Science Research Center, Beijing 100193, China.

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Summary
This summary is machine-generated.

Researchers developed a new method to measure work in finite-time quantum isothermal processes. This quantum computation approach simplifies complex thermodynamic measurements and reveals a 1/τ scaling for extra work.

Keywords:
IBM quantum computerisothermal processopen quantum systemquantum circuitquantum thermodynamics

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Area of Science:

  • Quantum Thermodynamics
  • Quantum Computing
  • Statistical Mechanics

Background:

  • Finite-time isothermal processes are crucial in quantum heat engines but are complex to analyze due to changing Hamiltonians and thermal bath interactions.
  • Classical thermodynamic measurements of work are challenging in these quantum systems.

Purpose of the Study:

  • To develop a method for measuring performed work in finite-time quantum isothermal processes.
  • To provide a new experimental platform for studying quantum thermodynamics using universal quantum computers.

Main Methods:

  • Decomposition of isothermal processes into piecewise adiabatic and isochoric steps.
  • Measurement of performed work as internal energy change during adiabatic steps.
  • Simulation of the process on a universal quantum computer (ibmqx2).

Main Results:

  • Successfully simulated finite-time isothermal processes on a quantum computer.
  • Demonstrated the 1/τ scaling of extra work in these processes, where τ is the time duration.

Conclusions:

  • The piecewise control scheme enables direct simulation and measurement of work in quantum isothermal processes.
  • This work offers a novel experimental approach for advancing quantum thermodynamics research.