- class C4XGate(label=None, ctrl_state=None)[source]¶
The 4-qubit controlled X gate.
This implementation is based on Page 21, Lemma 7.5, of , with the use of the relative phase version of c3x, the rc3x .
 Barenco et al., 1995. https://arxiv.org/pdf/quant-ph/9503016.pdf  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.
Get Clbits in condition.
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. If the gate has open controls, as determined from self.ctrl_state, the returned definition is conjugated with X without changing the internal _definition.
Get the duration.
Return instruction label
Get name of gate. If the gate has open controls the gate name will become:
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 the number of clbits.
Get number of control qubits.
The number of control qubits for the gate.
- Return type
Return the number of qubits.
Get parameters from base_gate.
List of gate parameters.
- Return type
CircuitError – Controlled gate does not define a base gate
Get the time unit of duration.