Vacuum friction in a rotating sphere
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
k
B
T
/ℏ.
For more details, see
A. Manjavacas and F. J. García de Abajo, Phys. Rev. Lett.
105
, 113601 (2010).
and
A. Manjavacas and F. J. García de Abajo, Phys. Rev. A
82
, 063827 (2010).
Particle dielectric function ε(ω)
Drude
Al2O3 (Palik)
SiO2 (glass, Palik)
For Drude: ε(ω)=1-ω
p
2
/ω(ω+iη)
ω
p
(eV) =
η (eV) =
Other parameters
Particle radius (nm) =
Particle density (g/cm
3
) =
