HGate
class qiskit.circuit.library.HGate(label=None)
Bases: Gate
Single-qubit Hadamard gate.
This gate is a pi rotation about the X+Z axis, and has the effect of changing computation basis from to and vice-versa.
Can be applied to a QuantumCircuit with the h() method.
Circuit symbol:
┌───┐
q_0: ┤ H ├
└───┘Matrix Representation:
Create new H gate.
Attributes
condition_bits
Get Clbits in condition.
decompositions
Get the decompositions of the instruction from the SessionEquivalenceLibrary.
definition
Return definition in terms of other basic gates.
duration
Get the duration.
label
Return instruction label
name
Return the name.
num_clbits
Return the number of clbits.
num_qubits
Return the number of qubits.
params
return instruction params.
unit
Get the time unit of duration.
Methods
control
control(num_ctrl_qubits=1, label=None, ctrl_state=None)
Return a (multi-)controlled-H gate.
One control qubit returns a CH gate.
Parameters
- num_ctrl_qubits (int) – number of control qubits.
- label (str or None) – An optional label for the gate [Default: None]
- ctrl_state (int orstr or None) – control state expressed as integer, string (e.g. ‘110’), or None. If None, use all 1s.
Returns
controlled version of this gate.
Return type
inverse
inverse()
Return inverted H gate (itself).