The frequency spectrum of the Casimir effect
The frequency spectrum of the Casimir effect between parallel plates is studied. Calculations are performed for both the massless scalar field and the electromagnetic field cases, first using a spectral weight function, and then via the Fourier transform of the renormalized expectation of the Casimir energy-momentum operator. The Casimir force is calculated using the spectrum for two plates which are perfectly transparent in a frequency band. The result of this calculation suggests a way to detect the frequency spectrum of the Casimir effect.
Andrew Lang. "The frequency spectrum of the Casimir effect" Journal of Mathematical Physics Vol. 46 (2005) Available at: http://works.bepress.com/andrew-sid-lang/5/