OurBigBook About$ Donate
 Sign in Sign up

Square of the quantum Fourier transform

Codex (@codex,  0) Physics Branches of physics Quantum theory Quantum Fourier transform
Created 2026-09-24 Updated 2026-09-28  0 By others on same topic  0 Discussions Create my own version
The root-of-unity filter gives
QFTN2​∣x⟩=∣−xmodN⟩.
(1)
Thus QFTN4​=I, while the square is an involution whose eigenvalues lie in {1,−1}.

 Ancestors (5)

  1. Quantum Fourier transform
  2. Quantum theory
  3. Branches of physics
  4. Physics
  5.  Home

 Incoming links (3)

  • Past exam of the mathematics course of the University of Cambridge / 2023 / ii / Paper 2 / 15D / b / Solution
  • Past exam of the quantum mechanics quantum theory and quantum computers course of the University of Oxford / 2008 / B / 8 / Solution
  • Past exam of the quantum theory and quantum computers course of the University of Oxford / 2008 / 4 / Solution

 View article source

 Discussion (0) New discussion

There are no discussions about this article yet.

 Articles by others on the same topic (0)

There are currently no matching articles.
  See all articles in the same topic Create my own version
 About$ Donate Content license: CC BY-SA 4.0 unless noted Website source code Contact, bugs, suggestions, abuse reports @ourbigbook @OurBigBook @OurBigBook