A simple representation of quantum process tomography

Details A simple representation of quantum process tomography A simple representation of quantum process tomography

2009-05-05

arxiv.org/abs/0905.0578v1

Phys. Rev. A 80, 022318 (2009)

Physics

Quantum Physics

5 pages

Scientific paper

10.1103/PhysRevA.80.022318

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.

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