Search found 4 matches

by mircomarahrens
10 Dec 2018, 13:40
Forum: Algorithms
Topic: Infinite DMRG state prediction
Replies: 2
Views: 1268

Re: Infinite DMRG state prediction

Remark: A slightly different approach to this is discussed in https://arxiv.org/abs/1606.06790. The arrangement of the tensor network for the iDMRG is slightly different and instead of sweeping through system one chunks it and update "disconnected bonds" at one simulation step. This can be done in p...
by mircomarahrens
31 Aug 2018, 09:05
Forum: Implementations
Topic: Parallel iDMRG with mpi4py
Replies: 6
Views: 2252

Re: Parallel iDMRG with mpi4py

Hey Johannes, I dunno which version is better or of any direct comparisons :-). It could be interesting to do that, but I guess they converge equivalent. The Ueda approach reminds me on a block decimation approach like TEBD. This helps me to understand what is going on during the simulation better, ...
by mircomarahrens
30 Aug 2018, 09:57
Forum: Implementations
Topic: Parallel iDMRG with mpi4py
Replies: 6
Views: 2252

Re: Parallel iDMRG with mpi4py

Hey Johannes, the approach by Ueda is separating the system into disconnecting parts, working on those in parallel and then updating the environments. The information flow is different in this approach since one does not sweep through the system in the sense of left-right sweeping. I guess this is v...
by mircomarahrens
23 Aug 2018, 09:05
Forum: Implementations
Topic: Parallel iDMRG with mpi4py
Replies: 6
Views: 2252

Parallel iDMRG with mpi4py

Hey there, I am working on a Parallelization of iDMRG following https://arxiv.org/abs/1606.06790 which could be interesting for TeNPy running on a Cluster and, if it runs, I would like to add to the package. So far I implemented, quick and dirty, a running version of it using the multiprocessing mod...