Checkpointing feature

[mattchan-tencent]

Hi,

I'd like to checkpoint a statevec/DM in QuEST in a single node configuration. (I think MPI isn't implemented yet?)

Is saving the qReg to disk and then later reading it back and using setAmps the way to do it?

Thanks!

[TysonRayJones]

Hi there,

Yep, you could use reportState() to save even an MPI-distributed state-vector to (shared) disk, then later process the files yourself and re-initialise the state using setAmps().

It would be a lot nicer to have a seamless checkpointing function in QuESTlink; we'll consider adding this in the next version!

Thanks,
Tyson