Contacless friction
Accelerating bodies in vacuum may experience friction, and emit radiation.
"Quantum theory of the EM Field in a Variable-Length 1d cavity," G.T. Moore, J. Math. Phys. 11, 2679 (1970)
"Radiation from a moving mirror in 2d space-time," Fulling & Davies, Proc.R.Soc, Ser. A 348, 393 (1976).
Stationary (time invariant) moving states:
"Shearing the vacuum - quantum friction," J.B. Pendry, J. Phys.: Condens. Matter 9, 10301 (1997).
"Near-field radiative heat transfer and noncontact friction," Volokitin & Persson, Rev. Mod. Phys. 79, 1291 (2007).
Rotation: Consider waves of frequency ω and angular state m impinging on object rotation 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," Maghrebi, Jaffe & MK, 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: 
Of any use?