On the complexity of unitary transformations

Verfasser / Beitragende:
[D. Yu. Cherukhin]
Ort, Verlag, Jahr:
2003
Enthalten in:
Discrete Mathematics and Applications, 13/6(2003-12-01), 601-606
Format:
Artikel (online)
ID: 378855646
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100 1 |a Cherukhin  |D D. Yu 
245 1 0 |a On the complexity of unitary transformations  |h [Elektronische Daten]  |c [D. Yu. Cherukhin] 
520 3 |a In this paper, we suggest a method to derive lower bounds for the complexity of non-branching programs whose elementary operations are unitary transformations over two complex numbers. This method provides us with estimates of the form Ω(n log n) for unitary operators Cn → Cn , in particular, for the Fourier and Walsh transformations. For n = 2 k we find precise values of the complexity of those transformations. 
540 |a Copyright 2003, Walter de Gruyter 
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