C3SXGate¶
-
class
C3SXGate(label=None, ctrl_state=None, *, angle=None)[source]¶ Bases:
qiskit.circuit.controlledgate.ControlledGateThe 3-qubit controlled sqrt-X gate.
This implementation is based on Page 17 of [1].
References
[1] Barenco et al., 1995. https://arxiv.org/pdf/quant-ph/9503016.pdf
Create a new 3-qubit controlled sqrt-X gate.
- Parameters
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.
Attributes
-
ctrl_state¶ Return the control state of the gate as a decimal integer.
- Return type
int
-
decompositions¶ Get the decompositions of the instruction from the SessionEquivalenceLibrary.
-
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
-
duration¶ Get the duration.
-
label¶ Return instruction label
- Return type
str
-
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
-
num_ctrl_qubits¶ Get number of control qubits.
- Returns
The number of control qubits for the gate.
- Return type
int
-
params¶ Get parameters from base_gate.
- Returns
List of gate parameters.
- Return type
list
- Raises
CircuitError – Controlled gate does not define a base gate
-
unit¶ Get the time unit of duration.