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## Main Question or Discussion Point

I read article

http://arxiv.org/abs/quant-ph/0401170

It obtains how Dopler frequency change exponentialy with time for accelerated observer.

Then it does Fourier's transformation of this waving and it gets thermical radiation.

But, where in quantum mechanics it is supported that we make Fourier's transformation that change one monotonic waving in accidenal radiation?

http://arxiv.org/abs/quant-ph/0401170

It obtains how Dopler frequency change exponentialy with time for accelerated observer.

Then it does Fourier's transformation of this waving and it gets thermical radiation.

But, where in quantum mechanics it is supported that we make Fourier's transformation that change one monotonic waving in accidenal radiation?