Module encoding 

Quantum encoding schemes for feature mapping

Functions

amplitude_encode

Amplitude encoding: encode classical data into quantum amplitudes

angle_encode

Angle encoding: encode data as rotation angles

basis_encode

Basis encoding: encode integer data as computational basis states Each integer is encoded as a binary string representing a basis state

dense_angle_encode

Dense angle encoding: encode multiple features per qubit using multiple rotations Uses RY and RZ rotations to encode 2 features per qubit

iqp_encode

IQP (Instantaneous Quantum Polynomial) encoding Encodes data using diagonal unitary gates with polynomial feature map

pauli_feature_map_encode

Pauli feature map encoding Encodes data using Pauli rotation gates with entanglement

product_encode

Product encoding: encode data using tensor product of single-qubit rotations Each feature is encoded using RY rotation on a separate qubit