SingleExcitation does not support parameter broadcasting?

PennyLane Help
1

I tried code below

import pennylane as qml
import numpy as np

dev = qml.device("default.qubit", wires=4)
@qml.qnode(dev)
def qc(thetas):
   qml.PauliX(wires=0)
   qml.PauliX(wires=1)
   qml.SingleExcitation(thetas[0],wires=[0,1])
   qml.SingleExcitation(thetas[1],wires=[2,3])
   return qml.state()
Thetas=np.random.rand(2,100)
print(qc(Thetas))

Then i got error like below

NotImplementedError: Applying a broadcasted unitary to an already broadcasted state via _apply_unitary is not supported. Broadcasting sizes are (100, 100)

If i replace SingleExcitation as another gate such as IsingXX, it works well.
Is SingleExcitation gate does not support parameter broadcasting?

2

Hi @maar_hybrid,

Thank you for your question.

I’m not getting this error when using the latest PennyLane version. Can you please post the output of qml.about() and your full error message?