Dipoles in blackbody radiation: Momentum fluctuations, decoherence, and drag force

• URL: http://arxiv.org/abs/2204.11113v1
• Date: Sat, 23 Apr 2022 17:40:14 GMT
• Title: Dipoles in blackbody radiation: Momentum fluctuations, decoherence, and drag force
• Authors: Kanu Sinha and Peter W. Milonni
• Abstract summary: A general expression is derived for the momentum diffusion constant of a small polarizable particle in blackbody radiation. We show how this diffusion constant appears in the steady-state photon emission rate of two dipoles induced by blackbody radiation.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: A general expression is derived for the momentum diffusion constant of a small polarizable particle in blackbody radiation, and is shown to be closely related to the long-wavelength collisional decoherence rate for such a particle in a thermal environment. We show how this diffusion constant appears in the steady-state photon emission rate of two dipoles induced by blackbody radiation. We consider in addition the Einstein--Hopf drag force on a small polarizable particle moving in a blackbody field, and derive its fully relativistic form from the Lorentz transformation of forces.

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