On the non-existence of a universal Hadamard gate
Quantum Physics
2007-05-23 v1
Abstract
We establish the non-existence of a universal Hadamard gate for arbitrary unknown qubits, by considering two different principles; namely, no-superluminal signalling and non-increase of entanglement under LOCC. It is also shown that these principles are not violated if and only if the qubit states are of a special form obtained in our recent work [ IJQI (in press), quant-ph/0505068 ].
Keywords
Cite
@article{arxiv.quant-ph/0606231,
title = {On the non-existence of a universal Hadamard gate},
author = {Preeti Parashar},
journal= {arXiv preprint arXiv:quant-ph/0606231},
year = {2007}
}
Comments
5 pages, LaTex