QML Encoding Comparison | Turn lessons into working experiments

Starter code

module encoding_lab;
@dataset("xor_2d", split: "train");
fn main() {
  let q: QReg<2> = qreg[2];
  encode(sample_row(1), q, method: "angle");
  let result = expect Z(q[0]) Z(q[1]);
  return result;
}

Expected output

The angle map consumes xor_2d row 1

The trace identifies the encoding method

The ZZ expectation is finite and reproducible

Debugging checklist

Run the angle starter

Switch method to iqp and compare the trace

Try amplitude as the first register operation

Explain the 2^n amplitude capacity

Extension challenge

Add a four-feature row and determine the smallest amplitude register that can hold it.