FirstOrderExpansion¶

class FirstOrderExpansion(feature_dimension, depth=2, data_map_func=<function self_product>)[source]¶

DEPRECATED. First Order Expansion feature map.

This is a sub-class of PauliZExpansion where z_order is fixed at 1. As a result the first order expansion will be a feature map without entangling gates.

Parameters

feature_dimension (int) – The number of features
depth (int) – The number of repeated circuits. Defaults to 2, has a minimum value of 1.
data_map_func (Callable[[ndarray], float]) – A mapping function for data x which can be supplied to override the default mapping from self_product().

Attributes

`FirstOrderExpansion.feature_dimension`	returns feature dimension
`FirstOrderExpansion.num_qubits`	returns number of qubits
`FirstOrderExpansion.support_parameterized_circuit`	returns whether or not the sub-class support parameterized circuit

Methods

`FirstOrderExpansion.construct_circuit`(x[, …])	Construct the second order expansion based on given data.
`FirstOrderExpansion.get_entangler_map`(…)	get entangle map
`FirstOrderExpansion.validate_entangler_map`(…)	validate entangler map