Exact simulation of classical heat engine cycles using single-ion phonon laser.

Area of Science:

• Thermodynamics
• Quantum Optics
• Atomic Physics

Background:

• Heat engines convert thermal energy to mechanical work using working substances.
• Conventional heat engines face limitations due to thermal fluctuations.
• Simulating thermodynamic processes at the nanoscale offers insights into fundamental physics.

Purpose of the Study:

• To experimentally simulate conventional heat engines using a single trapped ion.
• To demonstrate the Otto and Carnot thermodynamic cycles at the single-ion level.
• To compare the efficiencies of these cycles in a nanoscale system.

Main Methods:

• Utilizing the vibrational mode of a single trapped ion as the working substance.
• Employing coherent stimulation of ion vibrations as a phonon laser to suppress thermal noise.
• Monitoring vibrational amplitude and frequency to analyze thermodynamic cycles.

Main Results:

• Successfully demonstrated the standard steps of Otto and Carnot cycles in a single ion.
• Achieved high signal-to-noise ratio, enabling exact observation of thermodynamic processes.
• Compared the maximum efficiencies of the simulated Otto and Carnot cycles.

Conclusions:

• A single-atom thermal engine using coherently controlled phonons has been realized.
• This work presents the smallest platform for simulating classical thermodynamics.
• Optical manipulation techniques and phonon lasers are effective for nanoscale thermodynamic studies.