RZXGate
class RZXGate(theta, label=None)
Bases: qiskit.circuit.gate.Gate
A parametric 2-qubit interaction (rotation about ZX).
This gate is maximally entangling at .
The cross-resonance gate (CR) for superconducting qubits implements a ZX interaction (however other terms are also present in an experiment).
Can be applied to a QuantumCircuit
with the rzx()
method.
Circuit Symbol:
┌─────────┐
q_0: ┤0 ├
│ Rzx(θ) │
q_1: ┤1 ├
└─────────┘
Matrix Representation:
In Qiskit’s convention, higher qubit indices are more significant (little endian convention). In the above example we apply the gate on (q_0, q_1) which results in the tensor order. Instead, if we apply it on (q_1, q_0), the matrix will be :
┌─────────┐
q_0: ┤1 ├
│ Rzx(θ) │
q_1: ┤0 ├
└─────────┘
This is a direct sum of RX rotations, so this gate is equivalent to a uniformly controlled (multiplexed) RX gate:
Examples:
Create new RZX gate.
Methods Defined Here
inverse
RZXGate.inverse()
Return inverse RZX gate (i.e. with the negative rotation angle).
Attributes
condition_bits
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
Return type
str
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.