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20 August 2020 Phonon heat transfer across the quantum vacuum
Hao-Kun Li
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Proceedings Volume 11461, Active Photonic Platforms XII; 114610I (2020) https://doi.org/10.1117/12.2567357
Event: SPIE Nanoscience + Engineering, 2020, Online Only
Abstract
Quantum mechanics states that quantum fields are never at rest but constantly fluctuate even at zero temperature. These fluctuations lead to extraordinary physical consequences such as spontaneous emission and Hawking radiation. In this talk, we show experimentally that quantum fluctuations of electromagnetic field can induce phonon coupling between nearby objects and thus transfer heat across a vacuum. We use nanomechanical systems to realize strong Casimir phonon coupling, and observe thermal energy exchange between individual phonon modes by monitoring their thermal Brownian motions. Our experiment reveals a new mechanism of heat transfer in addition to the conventional conduction, convection and thermal radiation. It opens up new opportunities to study nanoscale energy transport and quantum thermal dynamics.
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Hao-Kun Li "Phonon heat transfer across the quantum vacuum", Proc. SPIE 11461, Active Photonic Platforms XII, 114610I (20 August 2020); https://doi.org/10.1117/12.2567357
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KEYWORDS
Phonons
Quantum mechanics
Convection
Electromagnetism
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