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
Attributes
coeffs
Quasiprobability decomposition coefficients.
kappa
Get the square root of the sampling overhead.
This quantity is the sum of the magnitude of the coefficients.
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.
The sampling overhead is the square of the sum of the magnitude of the coefficients.
probabilities
Get the probabilities on which the maps will be sampled.
Methods
from_instruction
static from_instruction(gate, /)
Generate a QPDBasis object, given a supported operation.
This static method is provided for convenience; it simply calls qpdbasis_from_instruction() under the hood.
Parameters
gate (Instruction) – The instruction from which to instantiate a decomposition
Return type
Returns
The newly-instantiated QPDBasis object