Time-dependent Hamiltonians - ramps

[AlexSchuckert]

Thanks so much for this package!

I was wondering whether it is at all possible to extend this framework to allow for general time-dependent Hamiltonians, specifically in order to describe ramps H(t)=(1-s(t))*H_0 +s(t) H_1 ? One possibility would be to trotterize, but maybe there is a better way, for example by using a GPU-compatible ODE solver.