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Results tagged with fourier-transform
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user 119192
A unitary linear operator which resolves a function on $\mathbb{R}^N$ into a linear superposition of "plane wave functions". Most often used in physics for calculating the response of a time shift invariant linear system as the sum of its response to time harmonic excitation or for transforming a quantum state in position co-ordinates into one in momentum co-ordinates and contrawise. There is also a discrete, fast Fourier transform for discretised data.
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Other spaces like Fourier space
Are there any other spaces like Fourier space in which one can more physical information than configuration space?
In a summer school about scattering amplitudes, someone told me that this relation be …
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