AngleEmbedding¶

class AngleEmbedding(rotation='Y')[source]¶

Bases: FeatureMap

Encode features as single-qubit rotation angles.

For an n_qubits-qubit register and an n_qubits-element feature vector x, applies R(x_i) to qubit i for the chosen rotation axis.

Parameters:: rotation (Literal['X', 'Y', 'Z']) – Rotation axis: "X", "Y", or "Z". Defaults to "Y".

Methods Summary

`build`(features, n_qubits, **kwargs)	Build the feature-map circuit.
`n_params`(n_qubits, **kwargs)	One feature per qubit.

Methods Documentation

build(features, n_qubits, **kwargs)[source]¶

Build the feature-map circuit.

Parameters:

features – Flat parameter array of length n_params(n_qubits). Entries are Qiskit Parameter objects bound from classical data at execution time.
n_qubits (int) – Number of qubits.

Returns:

Qiskit circuit implementing the encoding.

Return type:

QuantumCircuit

static n_params(n_qubits, **kwargs)[source]¶

One feature per qubit.