Entangling characterization of (SWAP)1/m and Controlled unitary gates
Quantum Physics
2009-11-13 v2
Abstract
We study the entangling power and perfect entangler nature of (SWAP)1/m, for m>=1, and controlled unitary (CU) gates. It is shown that (SWAP)1/2 is the only perfect entangler in the family. On the other hand, a subset of CU which is locally equivalent to CNOT is identified. It is shown that the subset, which is a perfect entangler, must necessarily possess the maximum entangling power.
Keywords
Cite
@article{arxiv.0808.1649,
title = {Entangling characterization of (SWAP)1/m and Controlled unitary gates},
author = {S. Balakrishnan and R. Sankaranarayanan},
journal= {arXiv preprint arXiv:0808.1649},
year = {2009}
}
Comments
12 pages, 1 figure, One more paragraph added in Introduction