How to use Qiskit Aer simulators instead of cusvaer?

[xumingkuan]

According to https://docs.nvidia.com/cuda/cuquantum/latest/appliance/qiskit.html, an option cusvaer_enable has been added since cuQuantum Appliance 22.11. I want to compare Qiskit Aer simulators with cusvaer so I want to set cusvaer_enable=False to run Qiskit Aer simulators. But I got backend: cusvaer_simulator_statevector from the output of the following Python program:

from qiskit import Aer, QuantumCircuit, transpile

circuit = ...
simulator = Aer.get_backend('aer_simulator_statevector', cusvaer_enable=False)
simulator.set_options(**options)
circuit = transpile(circuit, simulator)
job = simulator.run(circuit)
result = job.result()
print(f'backend: {result.backend_name}')

I was using the container from #36 (comment) with cuQuantum Appliance 23.03 on Perlmutter. I wondered if this was because Qiskit only supports a single node, but I got backend: cusvaer_simulator_statevector no matter if I use 2 nodes with 4 GPUs each, 1 node with 4 GPUs, or 1 node with 1 GPU. Should I not use the container if I want to use Qiskit Aer simulators?

[ymagchi]

Hi @xumingkuan,

Could you please try passing the cusvaer_enable option at simulator.set_options()? It will disable the cusvaer backend and invoke Aer backends instead.

[xumingkuan]

This works, thanks!