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. 2011 Nov 29;2:566. doi: 10.1038/ncomms1570

Figure 4. Process matrix measurement.

Figure 4

(a) Ideal χCNOT and (b) experimental χexp matrices (real part) obtained from the quantum process tomography of the CNOT gate. Imaginary part of χexp is negligible. X, Y and Z correspond to Pauli matrices σ1, σ2 and σ3, respectively.