Vacuum friction in a rotating sphere
Contact A. Manjavacas and F. J. García de Abajo for details

Stopping time τ of a rotating spherical particle calculated in the limit of small radius and slow rotations.
The stopping time is given as a function of vacuum temperature T and it is defined by an exp(-t/τ) time dependence of the rotation frequency.
The noted limit is defined by the conditions that the rotation frequency Ω and the speed of light divided by the radius are both small compared to kBT/ℏ.
For more details, see A. Manjavacas and F. J. García de Abajo, Phys. Rev. Lett. 105, 113601 (2010).
Particle dielectric function ε(ω)

For Drude: ε(ω)=1-ωp2/ω(ω+iη)
ωp (eV) =
η (eV) =

Geometry under consideration

Other parameters Particle radius (nm) =
Particle density (g/cm3) =