Mingru Yang
Mingru Yang
Hi Matt, I only tested it with the sample code in the TDVP repo. Actually I didn’t see any difference in the results but it runs slightly slower. I think...
Sorry for the late reply. Yes, that is roughly what was being done. My original implementation has included a procedure to figure out the partial time step according to [this...
The problem before this fix is that it uses huge memory when the MPO's bond dimension is large even if the bond dimension of the MPS is small, because there...
If I just use auto sites = Electron(N); auto ampo = AutoMPO(sites); for(int i = 1; i
Hi Daniel, Thanks for the suggestion! Currently, I think the `TDVPWorker` function can already fulfill your purpose. For the conventional TDVP, actually there is a better way to do measurement...
Hi Daniel, Thanks for the report! Could you please provide a minimal example that produces the wrong results? That would make me easier to fix the possible bugs. Sincerely, Mingru
Unable to do subspace expansion for QN conserved Hamiltonian with only next-nearest-neighbor hopping
Matt, thanks for your explanation. To use the hack you mentioned, then I need to first extend the local Hilbert space of the even sites from Heisenberg (dim 2) to...
Unable to do subspace expansion for QN conserved Hamiltonian with only next-nearest-neighbor hopping
I understand this point. So for iDMRG or finite-system DMRG, I either do 3-site algorithm or use the 2-site algorithm with noise, and this will be more efficient than blocking...
Unable to do subspace expansion for QN conserved Hamiltonian with only next-nearest-neighbor hopping
The spin exchange interaction between the even and odd sites is ready there in the Hamiltonian, but this does not help the problem. The default 2-site subspace expansion fails because...