The Amplifier Function
Learn about the amplifier function.
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The amplifier function
The next gate we create is the amplifier. So far, we learned the amplifier to consist of a controlled -gate encapsulated into Hadamard and -gates. Our amplifier is almost alike. However, we do not use Hadamard gates, but we use a part of the actual implementation of our quantum Bayesian network instead. We use the function apply_ischild_sex
we created in the lesson Estimating a Variable. Basically, this function applies -gates on the qubits at the positions QPOS_SEX
and QPOS_ISCHILD by
the angle representing the corresponding marginal probabilities.
The rest of the amplifier remains the standard amplifier we already know. Again, we apply a controlled -gate inside -gates. However, this time, we must apply the controlled -gate only on the two qubits whose state we want to amplify. These are the qubits at the positions QPOS_SEX
and QPOS_ISCHILD
in line 8.
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