We show how to fully characterize a quantum process in an open quantum system. We particularize the procedure to the case of a universal two-qubit gate in a quantum computer. We illustrate the method with a numerical simulation of a quantum gate in the ion trap quantum computer.
@article{arxiv.quant-ph/9611013,
title = {Complete Characterization of a Quantum Process: the Two-Bit Quantum Gate},
author = {J. F. Poyatos and J. I. Cirac and P. Zoller},
journal= {arXiv preprint arXiv:quant-ph/9611013},
year = {2009}
}
Comments
Accepted for publication in Physical Review Letters 08Nov96 (submitted 15Jly96)