Note

This is the documentation for the current state of the development branch of Qiskit Experiments. The documentation or APIs here can change prior to being released.

LocalPreparationBasis

class LocalPreparationBasis(name, instructions=None, default_states=None, qubit_states=None)

Local tensor-product preparation basis.

This basis consists of a set of 1-qubit instructions which are used to define a tensor-product basis on N-qubits.

Initialize a fitter preparation basis.

Parameters:

• name (str) – a name to identify the basis.

• instructions (Optional[Sequence[Instruction]]) – list of 1-qubit instructions for preparing states from the \(|0\rangle\) state.

• default_states (Union[List[QuantumState], Dict[Tuple[int, ...], QuantumState], None]) – Optional, default density matrices prepared by the input instructions. If None these will be determined by ideal simulation of the preparation instructions.

• qubit_states (Optional[Dict[Tuple[int, ...], Union[List[QuantumState], Dict[Tuple[int, ...], QuantumState]]]]) – Optional, a dict with physical qubit keys and a list of density matrices prepared by the list of basis instructions for a specific qubit. The default states will be used for any qubits not specified in this dict.

Raises:

QiskitError – If input states or instructions are not valid, or no instructions or states are provided.

Attributes

LocalPreparationBasis.name

Return the basis name

Methods

LocalPreparationBasis.circuit(index[, qubits])	Return the basis preparation circuit.
LocalPreparationBasis.index_shape(qubits)	Return the shape for the specified number of indices.
LocalPreparationBasis.matrix(index[, qubits])	Return the density matrix data array for the index and qubits.
LocalPreparationBasis.matrix_shape(qubits)	Return the shape of subsystem dimensions of the state attr:~matrix.