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
Simple representation of quantum process tomography / G. Benenti, G. Strini. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 80:2(2009), pp. 022318.022318.1-022318.022318.6.
Simple representation of quantum process tomography
G. StriniUltimo
2009
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
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