Cannot launch Rigetti

[Haoxiang-Wang]

I try to launch a Rigetti GPU following this example
https://github.com/aws/amazon-braket-pennylane-plugin-python/blob/5ead8b684d76a3fd7bca3d858b9f7ae7f4a3480a/example.py#L26-L28

But I encounter the Device does not exist error, even though I put device_arn='arn:aws:braket:us-west-1::device/qpu/rigetti/Aspen-M-2' in the function input:

~/opt/anaconda3/lib/python3.9/site-packages/pennylane/__init__.py in device(name, *args, **kwargs)
    335         return dev
    336 
--> 337     raise DeviceError("Device does not exist. Make sure the required plugin is installed.")
    338 
    339 

DeviceError: Device does not exist. Make sure the required plugin is installed.

I think it's because the device name "braket.rigetti" is not valid (or not supported yet?). Could you give some instructions on launching jobs to Rigetti QPUs with this braket-pennylane plugin?

[virajvchaudhari]

Hello @Haoxiang-Wang,

Thanks for reaching out. We currently don't support the keyword braket.rigetti. Could you please try running the circuit with the following and let us know if that works for you.

dev_qpu = qml.device("braket.aws.qubit",
wires=2,
device_arn='arn:aws:braket:us-west-1::device/qpu/rigetti/Aspen-M-2',
s3_destination_folder=s3, 
poll_timeout_seconds=1800, 
shots=10000)

You can find more information on how to launch jobs with Pennylane and Amazon Braket here.

[Haoxiang-Wang]

Hi @virajvchaudhari , thank you for the instruction! The device name "braket.aws_qubit" doesn't work (leading to the same DeviceError: Device does not exist.), but changing it to "braket.aws.qubit" makes the code work without error!

[virajvchaudhari]

Yes, @Haoxiang-Wang, I meant braket.aws.qubit, updated the instructions. I am glad it worked for you. Feel free to re-open if you face further issues.