qiskit.extensions.Initialize¶

class
Initialize
(params, num_qubits=None)[소스]¶ Complex amplitude initialization.
Class that implements the (complex amplitude) initialization of some flexible collection of qubit registers. 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 (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
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> and the qubit one to 0>.
 int: an integer that is used as a bitmap indicating which qubits to initialize
to 1>. Example: setting params to 5 would initialize qubit 0 and qubit 2 to 1> and qubit 1 to 0>.
 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> and the remaining 3 qubits to be initialized to 0>.

__init__
(params, num_qubits=None)[소스]¶ Create new initialize composite.
 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
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> and the qubit one to 0>.
 int: an integer that is used as a bitmap indicating which qubits to initialize
to 1>. Example: setting params to 5 would initialize qubit 0 and qubit 2 to 1> and qubit 1 to 0>.
 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> and the remaining 3 qubits to be initialized to 0>.
Methods
__init__
(params[, num_qubits])Create new initialize composite.
add_decomposition
(decomposition)Add a decomposition of the instruction to the SessionEquivalenceLibrary.
assemble
()Assemble a QasmQobjInstruction
broadcast_arguments
(qargs, cargs)Validation of the arguments.
c_if
(classical, val)Add classical condition on register or cbit classical and value val.
copy
([name])Copy of the instruction.
Call to create a circuit with gates that take the desired vector to zero.
inverse
()Invert this instruction.
Return True .IFF.
mirror
()DEPRECATED: use instruction.reverse_ops().
qasm
()Return a default OpenQASM string for the instruction.
repeat
(n)Creates an instruction with gate repeated n amount of times.
For a composite instruction, reverse the order of subinstructions.
soft_compare
(other)Soft comparison between gates.
validate_parameter
(parameter)Initialize instruction parameter can be str, int, float, and complex.
Attributes
Get the decompositions of the instruction from the SessionEquivalenceLibrary.
Return definition in terms of other basic gates.
Get the duration.
Return instruction label
return instruction params.
Get the time unit of duration.

add_decomposition
(decomposition)¶ Add a decomposition of the instruction to the SessionEquivalenceLibrary.

assemble
()¶ Assemble a QasmQobjInstruction

broadcast_arguments
(qargs, cargs)[소스]¶ Validation of the arguments.
 매개변수
qargs (List) – List of quantum bit arguments.
cargs (List) – List of classical bit arguments.
 Yields
Tuple(List, List) – A tuple with single arguments.
 예외
CircuitError – If the input is not valid. For example, the number of arguments does not match the gate expectation.

c_if
(classical, val)¶ Add classical condition on register or cbit classical and value val.

copy
(name=None)¶ Copy of the instruction.
 매개변수
name (str) – name to be given to the copied circuit, if None then the name stays the same.
 반환값
 a copy of the current instruction, with the name
updated if it was provided
 반환 형식

property
decompositions
¶ Get the decompositions of the instruction from the SessionEquivalenceLibrary.

property
definition
¶ Return definition in terms of other basic gates.

property
duration
¶ Get the duration.

gates_to_uncompute
()[소스]¶ Call to create a circuit with gates that take the desired vector to zero.
 반환값
circuit to take self.params vector to \({00\ldots0}\rangle\)
 반환 형식

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.)
 반환값
a fresh instruction for the inverse
 반환 형식
 예외
CircuitError – if the instruction is not composite and an inverse has not been implemented for it.

is_parameterized
()¶ Return True .IFF. instruction is parameterized else False

property
label
¶ Return instruction label
 반환 형식
str

mirror
()¶ DEPRECATED: use instruction.reverse_ops().
 반환값
 a new instruction with subinstructions
reversed.
 반환 형식

property
params
¶ return instruction params.

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
(n)¶ Creates an instruction with gate repeated n amount of times.
 매개변수
n (int) – Number of times to repeat the instruction
 반환값
Containing the definition.
 반환 형식
 예외
CircuitError – If n < 1.

reverse_ops
()¶ For a composite instruction, reverse the order of subinstructions.
This is done by recursively reversing all subinstructions. It does not invert any gate.
 반환값
 a new instruction with
subinstructions reversed.
 반환 형식

soft_compare
(other)¶ Soft comparison between gates. Their names, number of qubits, and classical bit numbers must match. The number of parameters must match. Each parameter is compared. If one is a ParameterExpression then it is not taken into account.
 매개변수
other (instruction) – other instruction.
 반환값
are self and other equal up to parameter expressions.
 반환 형식
bool

property
unit
¶ Get the time unit of duration.