C3SXGate
C3SXGate(label=None, ctrl_state=None, *, angle=None)
Bases: qiskit.circuit.controlledgate.ControlledGate
The 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(opens in a new tab)
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
inverse
C3SXGate.inverse()
Invert this gate. The C3X is its own inverse.
Attributes
condition_bits
Get Clbits in condition.
Return type
List[Clbit]
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.