qoqo.operations.PragmaSetStateVector

class qoqo.operations.PragmaSetStateVector

This PRAGMA operation sets the statevector of a quantum register.

The Circuit() module automatically initializes the qubits in the |0> state, so this PRAGMA operation allows you to set the state of the qubits to a state of your choosing. For instance, to initialize the psi-minus Bell state, we pass the following vector to the PRAGMA:

vector = np.array([0, 1 / np.sqrt(2), -1 / np.sqrt(2), 0])

Parameters:: internal (PragmaSetStateVector) – The statevector that is initialized.

__init__()

Methods

`__init__`()
`hqslang`()	Return hqslang name of the operation.
`involved_qubits`()	List all involved qubits (here, all).
`is_parametrized`()	Return true when the operation has symbolic parameters.
`remap_qubits`(mapping)	Remap qubits in a clone of the PRAGMA operation.
`statevector`()	Return the statevector.
`substitute_parameters`(substitution_parameters)	Substitute the symbolic parameters in a clone of the PRAGMA operation according to the substitution_parameters input.
`tags`()	Return tags classifying the type of the operation.

hqslang()

Return hqslang name of the operation.

Returns:: The hqslang name of the operation.
Return type:: str

involved_qubits()

List all involved qubits (here, all).

Returns:: The involved qubits of the PRAGMA operation.
Return type:: set[int]

is_parametrized()

Return true when the operation has symbolic parameters.

Returns:: True if the operation contains symbolic parameters, False if it does not.
Return type:: bool

remap_qubits(mapping)

Remap qubits in a clone of the PRAGMA operation.

Parameters:: mapping (dict[int, int]) – The dictionary containing the {qubit: qubit} mapping to use in the PRAGMA operation.
Returns:: The PRAGMA operation with the qubits remapped.
Return type:: self
Raises:: RuntimeError – The qubit remapping failed.

statevector()

Return the statevector.

Returns:: The statevector representing the qubit register.
Return type:: np.ndarray

substitute_parameters(substitution_parameters)

Substitute the symbolic parameters in a clone of the PRAGMA operation according to the substitution_parameters input.

Parameters:: substitution_parameters (dict[str, float]) – The dictionary containing the substitutions to use in the PRAGMA operation.
Returns:: The PRAGMA operation operation with the parameters substituted.
Return type:: self
Raises:: RuntimeError – The parameter substitution failed.

tags()

Return tags classifying the type of the operation.

Used for the type based dispatch in ffi interfaces.

Returns:: The tags of the operation.
Return type:: list[str]