qiskit.extensions.UnitaryGate¶

class
UnitaryGate
(data, label=None)[source]¶ Class for representing unitary gates
Create a gate from a numeric unitary matrix.
 Parameters
data (matrix or Operator) – unitary operator.
label (str) – unitary name for backend [Default: None].
 Raises
ExtensionError – if input data is not an Nqubit unitary operator.

__init__
(data, label=None)[source]¶ Create a gate from a numeric unitary matrix.
 Parameters
data (matrix or Operator) – unitary operator.
label (str) – unitary name for backend [Default: None].
 Raises
ExtensionError – if input data is not an Nqubit unitary operator.
Methods
__init__
(data[, label])Create a gate from a numeric unitary matrix.
add_decomposition
(decomposition)Add a decomposition of the instruction to the SessionEquivalenceLibrary.
adjoint
()Return the adjoint of the unitary.
assemble
()Assemble a QasmQobjInstruction
broadcast_arguments
(qargs, cargs)Validation and handling of the arguments and its relationship.
c_if
(classical, val)Add classical condition on register classical and value val.
Return the conjugate of the unitary.
control
([num_ctrl_qubits, label, ctrl_state])Return controlled version of gate
copy
([name])Copy of the instruction.
inverse
()Return the adjoint of the unitary.
Return True .IFF.
mirror
()DEPRECATED: use instruction.reverse_ops().
power
(exponent)Creates a unitary gate as gate^exponent.
qasm
()The qasm for a custom unitary gate This is achieved by adding a custom gate that corresponds to the definition of this gate.
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.
Return a Numpy.array for the gate unitary matrix.
Return the transpose of the unitary.
validate_parameter
(parameter)Unitary gate parameter has to be an ndarray.
Attributes
Get the decompositions of the instruction from the SessionEquivalenceLibrary.
Return definition in terms of other basic gates.
Get the duration.
Return gate 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
 Return type
Instruction

broadcast_arguments
(qargs, cargs)¶ Validation and handling of the arguments and its relationship.
For example,
cx([q[0],q[1]], q[2])
meanscx(q[0], q[2]); cx(q[1], q[2])
. This method yields the arguments in the right grouping. In the given example:in: [[q[0],q[1]], q[2]],[] outs: [q[0], q[2]], [] [q[1], q[2]], []
The general broadcasting rules are:
If len(qargs) == 1:
[q[0], q[1]] > [q[0]],[q[1]]
If len(qargs) == 2:
[[q[0], q[1]], [r[0], r[1]]] > [q[0], r[0]], [q[1], r[1]] [[q[0]], [r[0], r[1]]] > [q[0], r[0]], [q[0], r[1]] [[q[0], q[1]], [r[0]]] > [q[0], r[0]], [q[1], r[0]]
If len(qargs) >= 3:
[q[0], q[1]], [r[0], r[1]], ...] > [q[0], r[0], ...], [q[1], r[1], ...]
 Parameters
qargs (
List
) – List of quantum bit arguments.cargs (
List
) – List of classical bit arguments.
 Return type
Tuple
[List
,List
] Returns
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
(classical, val)¶ Add classical condition on register classical and value val.

control
(num_ctrl_qubits=1, label=None, ctrl_state=None)[source]¶ Return controlled version of gate
 Parameters
num_ctrl_qubits (int) – number of controls to add to gate (default=1)
label (str) – optional gate label
ctrl_state (int or str or None) – The control state in decimal or as a bit string (e.g. ‘1011’). If None, use 2**num_ctrl_qubits1.
 Returns
controlled version of gate.
 Return type
 Raises
QiskitError – Invalid ctrl_state.
ExtensionError – Nonunitary controlled unitary.

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

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.

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

property
label
¶ Return gate label
 Return type
str

mirror
()¶ DEPRECATED: use instruction.reverse_ops().
 Returns
 a new instruction with subinstructions
reversed.
 Return type

property
params
¶ return instruction params.

power
(exponent)¶ Creates a unitary gate as gate^exponent.
 Parameters
exponent (float) – Gate^exponent
 Returns
To which to_matrix is self.to_matrix^exponent.
 Return type
 Raises
CircuitError – If Gate is not unitary

qasm
()[source]¶ The qasm for a custom unitary gate This is achieved by adding a custom gate that corresponds to the definition of this gate. It gives the gate a random name if one hasn’t been given to it.

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.

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.
 Returns
 a new instruction with
subinstructions reversed.
 Return type

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.
 Parameters
other (instruction) – other instruction.
 Returns
are self and other equal up to parameter expressions.
 Return type
bool

to_matrix
()¶ Return a Numpy.array for the gate unitary matrix.
 Returns
if the Gate subclass has a matrix definition.
 Return type
np.ndarray
 Raises
CircuitError – If a Gate subclass does not implement this method an exception will be raised when this base class method is called.

property
unit
¶ Get the time unit of duration.