Implement minSR from arXiv:2302.01941.

[RehMoritz]

Implementation of the minSR algorithm that was successfully tested on the 6x6 J1-J2.
We would however need to adapt the storage of some of the metadata (i.e. tdvp error and similar) that requires computation of the S-matrix.

[markusschmitt]

Implementation of the minSR algorithm that was successfully tested on the 6x6 J1-J2. We would however need to adapt the storage of some of the metadata (i.e. tdvp error and similar) that requires computation of the S-matrix.

I would suggest to separate the minSR from the TDVP class and instead have an own class for it. This should then just return additional info that is immediately available.

Can we also add a test that compares for a small system ground state energies obtained by SR and by minSR?

[markusschmitt]

Implementation of the minSR algorithm that was successfully tested on the 6x6 J1-J2. We would however need to adapt the storage of some of the metadata (i.e. tdvp error and similar) that requires computation of the S-matrix.

I would suggest to separate the minSR from the TDVP class and instead have an own class for it. This should then just return additional info that is immediately available.

Can we also add a test that compares for a small system ground state energies obtained by SR and by minSR?

I implemented these suggestions.