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ObsidianVault/SS2026/Quantum Computing/10. Discrete Fourier Transformation/Discrete Fourier Transformation.md
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A mathematical technique that decomposes a function into its constituent frequencies.

Definition

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The transformation is a process that takes a periodic vector as an input and outputs the period of that vector.

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Construction

We will now model DFT as a quantum circuit. For this we only look at N = 2^n, DFT applied on n qubits.