We study the physical implementation of an optimal tomographic reconstruction scheme for the case of determining the state of a multi-qubit system, where trapped ions are used for defining qubits. The protocol is based on the use of mutually unbiased measurements and on the physical information described in H. H\"{a}ffner \emph{et. al} [Nature \textbf{438}, 643-646 (2005)]. We introduce the concept of physical complexity for different types of unbiased measurements and analyze their generation in terms of one and two qubit gates for trapped ions.
@article{arxiv.0805.3496,
title = {Optimal quantum state reconstruction for cold trapped ions},
author = {A. B. Klimov and A. Fernández and C. Muñoz and C. Saavedra},
journal= {arXiv preprint arXiv:0805.3496},
year = {2009}
}
Comments
Accepted for publication in Phys. Rev. A as Rap. Comm