C3SXGate(label=None, ctrl_state=None, *, angle=None)¶
The 3-qubit controlled sqrt-X gate.
This implementation is based on Page 17 of .
 Barenco et al., 1995. https://arxiv.org/pdf/quant-ph/9503016.pdf
Create a new 3-qubit controlled sqrt-X gate.
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.
angle (float) – DEPRECATED. The angle used in the controlled-U1 gates. An angle of π/8 yields the sqrt(X) gates, an angle of π/4 the 3-qubit controlled X gate.
Methods Defined Here
Invert this gate.
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.
Get number of control qubits.
The number of control qubits for the gate.
Get parameters from base_gate.
List of gate parameters.
CircuitError – Controlled gate does not define a base gate
Get the time unit of duration.