A simple representation of quantum process tomography

Abstract

We show that the Fano representation leads to a particularly simple and appealing form of the quantum process tomography matrix ${\chi }_{{}_F}$, in that the matrix ${\chi }_{{}_F}$ is real, the number of matrix elements is exactly equal to the number of free parameters required for the complete characterization of a quantum operation, and these matrix elements are directly related to evolution of the expectation values of the system's polarization measurements. These facts are illustrated in the examples of one- and two-qubit quantum noise channels.

5 pages

References in corpus (2)

• Quantum Process Tomography: Resource Analysis of Different Strategies
• Effects of single-qubit quantum noise on entanglement purification