Gertian

I quickly tested the amount of overhead and it seems to be the case that my first bug-fix is quite a bit slower than just defaulting to the stable version....

@DaanMaertens So what's the current status of this ? Is it possible to time evolve a finite window of perturbed GS inside a bath of GS. Does the current implementation...

@lkdvos @DaanMaertens I remember that I was playing around with this years ago and that it was not entirely trivial to get these phases to work (even though it should...

Does this means addition of MPO's is expected to give the wrong result at this point in time or am I misinterpreting what ``lazysum`` does ?

@maartenvd , thanks for this information. This stressed me out for a second...

We should just put U, S, V, = tsvd(Δ.Z, alg = SVD()) in https://github.com/Jutho/TensorKitManifolds.jl/blob/7391fe01a4c60eb06ef8fcf2a3b4849bffdbce1e/src/grassmann.jl#L59 to fix this issue. (At least in my particular case)

> I suggested Gertian to post this here rather than in TensorKitManifolds, as I assumed that it would also affect other algorithms. I did not know that you opted for...

Ok I think I did the neccecairy changes for this to work in : https://github.com/QuantumKitHub/MPSKit.jl/tree/SVD/SDD_fix and https://github.com/Gertian/TensorKitManifolds.jl In TensorKitManifolds I simply made it so that alg actually functions. @Jutho had...

This sounds like a better approach indeed. I looked into the finalize thing and this was slightly problematic because the function can only take input from the current state of...

@maartenvd and @lkdvos As maarten suggested I ended up fixing this using finalize. In particular we now have : ```julia function finalize_saver(x, f, g, numiter) #x = state, f =...