Universal Quantum Gates For Tensors
arXiv:quant-ph/0403160
Abstract
A universal quantum gate is introduced for tensors of vector spaces. By using integer powers of such a gate and by using classical reversible gates one can approximate any element of the unitary group to any accuracy needed. The proof uses a version of Kronecker's theory and the structure of the Bloch sphere for tensors.
This paper has been withdrawn by the author, it needs a revision and editing