SamplerV2 will not adhere to options dictionary passed.

[MarcoBarroca]

Informations

• Qiskit Aer version: 0.15.1
• Python version: 3.10.5
• Operating system: Linux_x86

What is the current behavior?

When using SamplerV2 and passing an options dictionary like so:

from qiskit_aer.primitives import SamplerV2
from qiskit_aer import AerSimulator 
from qiskit import transpile
from qiskit.primitives import BackendSamplerV2

service = QiskitRuntimeService()
backend = service.least_busy(min_num_qubits=127)

simulator = AerSimulator(method='statevector').from_backend(backend)
# sampler=SamplerV2(options={"backend_options":{'method':'statevector','device':'GPU'},#,'blocking_enable':True,'blocking_qubits':6,'cuStateVec_enable':True,'batched_shots_gpu':True,"batched_shots_gpu_max_qubits":16,"shot_branching_enable":True},
#                            "run_options":{}}).from_backend(backend)

options={
    "backend_options":{'method':'statevector','device':'GPU'},#,'blocking_enable':True,'blocking_qubits':6,'cuStateVec_enable':True,'batched_shots_gpu':True,"batched_shots_gpu_max_qubits":16,"shot_branching_enable":True},
    "run_options":{}
}

sampler=SamplerV2(options=options).from_backend(backend)

Options are not being passed to the sampler object. They can be checked with

sampler._backend._options

Currently, options need to be manually set using sampler._backend.set_options(method='statevector',device="GPU") after the object is created.

Steps to reproduce the problem

The code above should reproduce it.

What is the expected behavior?

Options should be passed to the sampler object instead of requiring the user to set options manually afterward.

Suggested solutions

Unsure what is causing the issue.