Initialize
class Initialize(params)
Complex amplitude initialization.
Class that implements the (complex amplitude) initialization of some flexible collection of qubit registers (assuming the qubits are in the zero state). Note that Initialize is an Instruction and not a Gate since it contains a reset instruction, which is not unitary.
Create new initialize composite.
params (list): vector of complex amplitudes to initialize to
Attributes
decompositions
Get the decompositions of the instruction from the SessionEquivalenceLibrary.
definition
Return definition in terms of other basic gates.
params
return instruction params.
Methods
add_decomposition
Initialize.add_decomposition(decomposition)
Add a decomposition of the instruction to the SessionEquivalenceLibrary.
assemble
Initialize.assemble()
Assemble a QasmQobjInstruction
broadcast_arguments
Initialize.broadcast_arguments(qargs, cargs)
Validation of the arguments.
Parameters
- qargs (List) – List of quantum bit arguments.
- cargs (List) – List of classical bit arguments.
Yields
Tuple(List, List) – A tuple with single arguments.
Raises
CircuitError – If the input is not valid. For example, the number of arguments does not match the gate expectation.
c_if
Initialize.c_if(classical, val)
Add classical condition on register classical and value val.
copy
Initialize.copy(name=None)
Copy of the instruction.
Parameters
name (str) – name to be given to the copied circuit, if None then the name stays the same.
Returns
a copy of the current instruction, with the name
updated if it was provided
Return type
gates_to_uncompute
Initialize.gates_to_uncompute()
Call to create a circuit with gates that take the desired vector to zero.
Returns
circuit to take self.params vector to
Return type
inverse
Initialize.inverse()
Invert this instruction.
If the instruction is composite (i.e. has a definition), then its definition will be recursively inverted.
Special instructions inheriting from Instruction can implement their own inverse (e.g. T and Tdg, Barrier, etc.)
Returns
a fresh instruction for the inverse
Return type
Raises
CircuitError – if the instruction is not composite and an inverse has not been implemented for it.
is_parameterized
Initialize.is_parameterized()
Return True .IFF. instruction is parameterized else False
mirror
Initialize.mirror()
For a composite instruction, reverse the order of sub-gates.
This is done by recursively mirroring all sub-instructions. It does not invert any gate.
Returns
a fresh gate with sub-gates reversed
Return type
qasm
Initialize.qasm()
Return a default OpenQASM string for the instruction.
Derived instructions may override this to print in a different format (e.g. measure q[0] -> c[0];).
repeat
Initialize.repeat(n)
Creates an instruction with gate repeated n amount of times.
Parameters
n (int) – Number of times to repeat the instruction
Returns
Containing the definition.
Return type
Raises
CircuitError – If n < 1.