C4XGate¶
-
class
C4XGate(label=None, ctrl_state=None)[source]¶ Bases:
qiskit.circuit.controlledgate.ControlledGateThe 4-qubit controlled X gate.
This implementation is based on Page 21, Lemma 7.5, of [1], with the use of the relative phase version of c3x, the rc3x [2].
References
[1] Barenco et al., 1995. https://arxiv.org/pdf/quant-ph/9503016.pdf [2] Maslov, 2015. https://arxiv.org/abs/1508.03273
Create a new 4-qubit controlled X gate.
Methods Defined Here
Controlled version of this gate.
Invert this gate.
Attributes
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ctrl_state¶ Return the control state of the gate as a decimal integer.
- Return type
int
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decompositions¶ Get the decompositions of the instruction from the SessionEquivalenceLibrary.
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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.
- Return type
List
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duration¶ Get the duration.
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label¶ Return instruction label
- Return type
str
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name¶ Get name of gate. If the gate has open controls the gate name will become:
<original_name_o<ctrl_state>
where <original_name> is the gate name for the default case of closed control qubits and <ctrl_state> is the integer value of the control state for the gate.
- Return type
str
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num_ctrl_qubits¶ Get number of control qubits.
- Returns
The number of control qubits for the gate.
- Return type
int
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params¶ Get parameters from base_gate.
- Returns
List of gate parameters.
- Return type
list
- Raises
CircuitError – Controlled gate does not define a base gate
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unit¶ Get the time unit of duration.
-