qiskit.circuit.library.C3XGate¶
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class
C3XGate(angle=None, label=None, ctrl_state=None)[source]¶ The 4-qubit controlled X gate.
This implementation uses \(\sqrt{T}\) and 14 CNOT gates.
Create a new 3-qubit controlled X gate.
Methods
__init__([angle, label, ctrl_state])Create a new 3-qubit controlled X gate.
add_decomposition(decomposition)Add a decomposition of the instruction to the SessionEquivalenceLibrary.
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.
control([num_ctrl_qubits, label, ctrl_state])Controlled version of this gate.
copy([name])Copy of the instruction.
inverse()Invert this gate.
Return True .IFF.
mirror()DEPRECATED: use instruction.reverse_ops().
power(exponent)Creates a unitary gate as gate^exponent.
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 sub-instructions.
Return a Numpy.array for the gate unitary matrix.
validate_parameter(parameter)Gate parameters should be int, float, or ParameterExpression
Attributes
Return the control state of the gate as a decimal integer.
Get the decompositions of the instruction from the SessionEquivalenceLibrary.
Return definition in terms of other basic gates.
Get the duration.
Return gate label
Get number of control qubits.
Get parameters from base_gate.
Get the time unit of duration.
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add_decomposition(decomposition)¶ Add a decomposition of the instruction to the SessionEquivalenceLibrary.
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assemble()¶ Assemble a QasmQobjInstruction
- Type renvoyé
Instruction
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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], ...]
- Paramètres
qargs (
List) – List of quantum bit arguments.cargs (
List) – List of classical bit arguments.
- Type renvoyé
Tuple[List,List]- Renvoie
A tuple with single arguments.
- Lève
CircuitError – If the input is not valid. For example, the number of arguments does not match the gate expectation.
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c_if(classical, val)¶ Add classical condition on register classical and value val.
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control(num_ctrl_qubits=1, label=None, ctrl_state=None)[source]¶ Controlled version of this gate.
- Paramètres
num_ctrl_qubits (int) – number of control qubits.
label (str or None) – An optional label for the gate [Default: None]
ctrl_state (int or str or None) – control state expressed as integer, string (e.g. “110”), or None. If None, use all 1s.
- Renvoie
controlled version of this gate.
- Type renvoyé
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copy(name=None)¶ Copy of the instruction.
- Paramètres
name (str) – name to be given to the copied circuit, if None then the name stays the same.
- Renvoie
- a copy of the current instruction, with the name
updated if it was provided
- Type renvoyé
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property
ctrl_state¶ Return the control state of the gate as a decimal integer.
- Type renvoyé
int
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property
decompositions¶ Get the decompositions of the instruction from the SessionEquivalenceLibrary.
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property
definition¶ Return definition in terms of other basic gates. If the gate has open controls, as determined from self.ctrl_state, the returned definition is conjugated with X without changing the internal _definition.
- Type renvoyé
List
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property
duration¶ Get the duration.
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is_parameterized()¶ Return True .IFF. instruction is parameterized else False
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property
label¶ Return gate label
- Type renvoyé
str
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mirror()¶ DEPRECATED: use instruction.reverse_ops().
- Renvoie
- a new instruction with sub-instructions
reversed.
- Type renvoyé
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property
num_ctrl_qubits¶ Get number of control qubits.
- Renvoie
The number of control qubits for the gate.
- Type renvoyé
int
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property
params¶ Get parameters from base_gate.
- Renvoie
List of gate parameters.
- Type renvoyé
list
- Lève
CircuitError – Controlled gate does not define a base gate
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power(exponent)¶ Creates a unitary gate as gate^exponent.
- Paramètres
exponent (float) – Gate^exponent
- Renvoie
To which to_matrix is self.to_matrix^exponent.
- Type renvoyé
- Lève
CircuitError – If Gate is not unitary
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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];).
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repeat(n)¶ Creates an instruction with gate repeated n amount of times.
- Paramètres
n (int) – Number of times to repeat the instruction
- Renvoie
Containing the definition.
- Type renvoyé
- Lève
CircuitError – If n < 1.
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reverse_ops()¶ For a composite instruction, reverse the order of sub-instructions.
This is done by recursively reversing all sub-instructions. It does not invert any gate.
- Renvoie
- a new instruction with
sub-instructions reversed.
- Type renvoyé
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to_matrix()¶ Return a Numpy.array for the gate unitary matrix.
- Lève
CircuitError – If a Gate subclass does not implement this method an exception will be raised when this base class method is called.
- Type renvoyé
ndarray
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property
unit¶ Get the time unit of duration.
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validate_parameter(parameter)¶ Gate parameters should be int, float, or ParameterExpression
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