Tomography of Quantum Operations
Quantum Physics
2009-11-06 v1
Abstract
Quantum operations describe any state change allowed in quantum mechanics, including the evolution of an open system or the state change due to a measurement. In this letter we present a general method based on quantum tomography for measuring experimentally the matrix elements of an arbitrary quantum operation. As input the method needs only a single entangled state. The feasibility of the technique for the electromagnetic field is shown, and the experimental setup is illustrated based on homodyne tomography of a twin-beam.
Cite
@article{arxiv.quant-ph/0012071,
title = {Tomography of Quantum Operations},
author = {G. M. D'Ariano and P. Lo Presti},
journal= {arXiv preprint arXiv:quant-ph/0012071},
year = {2009}
}
Comments
Submitted to Phys. Rev. Lett. 2 eps + 1 latex figures