circuit_knitting.cutting.qpd.QPDBasis

class QPDBasis(maps, coeffs)

Bases: object

Basis in which to decompose an operation.

This class defines a basis in which a quantum operation will be decomposed. The ideal (noise-free) quantum operation will be decomposed into a quasiprobabilistic mixture of noisy circuits.

Assign member variables.

Parameters:

• maps (Sequence[tuple[Sequence[Instruction], ...]]) – A sequence of tuples describing the noisy operations probabilistically used to simulate an ideal quantum operation.

• coeffs (Sequence[float]) – Coefficients for quasiprobability representation. Each coefficient can be any real number.

Returns:

None

Methods

__init__(maps, coeffs)	Assign member variables.
from_instruction(gate, /)	Generate a QPDBasis object, given a supported operation.

Attributes

coeffs	Quasiprobability decomposition coefficients.
kappa	Get the square root of the sampling overhead.
maps	Get mappings for each qubit in the decomposition.
num_qubits	Get number of qubits that this decomposition acts on.
overhead	Get the sampling overhead.
probabilities	Get the probabilities on which the maps will be sampled.