Quick summary: Except a special class of quantum states where quantum Fourier transform can exponentially speedup, in general it is not faster than classical Fourier transform. Definition of classical Fourier transform A discrete Fourier transform (DFT) of a 2n-length vector $x= \left( x_0, x_1, \ldots, x_{2^n..
Physics Corner 2022. 7. 16. 22:46
Quick summary: Except a special class of quantum states where quantum Fourier transform can exponentially speedup, in general it is not faster than classical Fourier transform. Definition of classical Fourier transform A discrete Fourier transform (DFT) of a 2n-length vector $x= \left( x_0, x_1, \ldots, x_{2^n..