Dissipated radiation

Dissipated energy from friction of vacuum must be released in the form of radiation

Rotational friction: Consider waves of frequency ω and angular state m impinging on object rotating with frequency Ω

Lab frame:           

Object frame:         

 "Generation of waves by a rotating body,"

Ya B. Zel'dovich, JETP Lett. 14, 180 (1971);  If  ω' and  ω have opposite signs:

   Amplitude of (classical) scattered wave exceeds incoming wave (Super-radiance).

   Conjectured (quantum) spontaneous emission with no incoming wave.

 "Spontaneous emission by rotating objects: A scattering approach,"

M.F. Maghrebi, R.L. Jaffe, & M. Kardar, PRL108, 230403 (2012). 

Number of photons in a mode of frequency ω and angular momentum m,

generated by object rotating with angular velocity Ω  is:

E.g., net power for a rotating cylinder:  

BBT  (url)

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