Initialize¶
- class Initialize(params, num_qubits=None)[source]¶
Bases:
qiskit.circuit.instruction.Instruction
Complex amplitude initialization.
Class that initializes some flexible collection of qubit registers, implemented by calling the
qiskit.extensions.StatePreparation
Class. Note that Initialize is an Instruction and not a Gate since it contains a reset instruction, which is not unitary.Create new initialize composite.
- Parameters
params (str, list, int or Statevector) –
Statevector: Statevector to initialize to.
list: vector of complex amplitudes to initialize to.
string: labels of basis states of the Pauli eigenstates Z, X, Y. See
Statevector.from_label()
. Notice the order of the labels is reversed with respect to the qubit index to be applied to. Example label ‘01’ initializes the qubit zero to \(|1\rangle\) and the qubit one to \(|0\rangle\).int: an integer that is used as a bitmap indicating which qubits to initialize to \(|1\rangle\). Example: setting params to 5 would initialize qubit 0 and qubit 2 to \(|1\rangle\) and qubit 1 to \(|0\rangle\).
num_qubits (int) – This parameter is only used if params is an int. Indicates the total number of qubits in the initialize call. Example: initialize covers 5 qubits and params is 3. This allows qubits 0 and 1 to be initialized to \(|1\rangle\) and the remaining 3 qubits to be initialized to \(|0\rangle\).
Methods
Add a decomposition of the instruction to the SessionEquivalenceLibrary.
Assemble a QasmQobjInstruction
Validation of the arguments.
Set a classical equality condition on this instruction between the register or cbit
classical
and valueval
.Copy of the instruction.
Call to create a circuit with gates that take the desired vector to zero.
Invert this instruction.
Return True .IFF.
Return a default OpenQASM string for the instruction.
Creates an instruction with gate repeated n amount of times.
For a composite instruction, reverse the order of sub-instructions.
Soft comparison between gates.
Instruction parameters has no validation or normalization.
Attributes
- decompositions¶
Get the decompositions of the instruction from the SessionEquivalenceLibrary.
- definition¶
Return definition in terms of other basic gates.
- duration¶
Get the duration.
- label¶
Return instruction label
- Return type
str
- name¶
Return the name.
- num_clbits¶
Return the number of clbits.
- num_qubits¶
Return the number of qubits.
- params¶
Return initialize params.
- unit¶
Get the time unit of duration.