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Figure 5 | EPJ Quantum Technology

Figure 5

From: A coherent perceptron for all-optical learning

Figure 5

Fredkin gate and thresholder circuit. In the upper graphic of (a) we present a schematic for Fredkin gate based on a two mode cross-Kerr-nonlinear resonator. The lower graphic shows how this circuit can be pre-pended with a single mode nonlinear resonator to better approximate a thresholding response. In (b) we present the input-output characteristic of the prepended resonator (upper left), the Fredkin gate (upper right) and the combined input output relationship between the inner product amplitude s and the estimated state label \(\hat{y}\).

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