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Vacuum-fluctuation-mediated phonon heat transfer in a coupled optomechanical system
Optics Letters
|April 15, 2026
Summary
This study introduces a novel optomechanical system for heat transfer using optical vacuum fluctuations. It demonstrates tunable phonon heat transfer between mechanical oscillators via virtual photons, even in an optical vacuum state.
Area of Science:
- Quantum physics
- Optomechanics
- Thermodynamics
Background:
- Vacuum is typically a thermal insulator, with heat transfer dominated by radiation.
- Conventional vacuum heat transfer relies on electromagnetic fluctuations.
- Optomechanical systems couple light and mechanical motion.
Purpose of the Study:
- To investigate a new structure for heat transfer using optical vacuum fluctuations.
- To explore phonon heat transfer between coupled optomechanical systems.
- To demonstrate tunable quantum thermal devices.
Main Methods:
- Utilizing coupled optomechanical systems.
- Employing optical vacuum fluctuations as heat transfer channels.
- Analyzing radiation pressure interaction and inter-cavity photon tunneling.
Main Results:
- Achieved steady-state phonon heat transfer between spatially separated mechanical oscillators via virtual photons.
- Demonstrated control over effective detuning and coupling via cavity length and photon tunneling.
- Observed a non-monotonic relationship between heat flux and dissipation in the degenerate state.
Conclusions:
- Vacuum fluctuations play a crucial role in optomechanical heat transfer.
- The proposed system offers a feasible pathway for developing tunable quantum thermal devices.
- Radiation pressure and photon tunneling enable heat transfer in optical vacuum.
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