cuda_torchdiffeq_integrator.py: check if pytorch is built with cuda capabilities #2613
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Check if the installed pytorch is cuda aware.
This seems to only be an issue in the field on
aarch64
systems where the pytorch in the default pip repository is not cuda aware.This is a code check of the warning described in https://nvidia.github.io/cuda-quantum/latest/using/backends/dynamics.html#numerical-integrators.