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An angular momentum approach to quadratic Fourier transform, Hadamard matrices, Gauss sums, mutually unbiased bases, unitary group and Pauli group

Abstract : The construction of unitary operator bases in a finite-dimensional Hilbert space is reviewed through a nonstandard approach combinining angular momentum theory and representation theory of SU(2). A single formula for the bases is obtained from a polar decomposition of SU(2) and analysed in terms of cyclic groups, quadratic Fourier transforms, Hadamard matrices and generalized Gauss sums. Weyl pairs, generalized Pauli operators and their application to the unitary group and the Pauli group naturally arise in this approach.
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Contributor : Maurice Robert Kibler <>
Submitted on : Thursday, July 16, 2009 - 3:28:00 PM
Last modification on : Thursday, March 26, 2020 - 4:43:44 PM
Long-term archiving on: : Tuesday, June 15, 2010 - 6:49:51 PM

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Maurice Robert Kibler. An angular momentum approach to quadratic Fourier transform, Hadamard matrices, Gauss sums, mutually unbiased bases, unitary group and Pauli group. Journal of Physics A: Mathematical and Theoretical, IOP Publishing, 2009, 42, pp.353001. ⟨10.1088/1751-8113/42/35/353001⟩. ⟨in2p3-00404520⟩

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