[ITensors] [BUG] Sum of MPOs in DMRG for excited states doesn't work #1289
Labels
bug
Something isn't working
ITensorMPS
Issues related to the ITensorMPS submodule
mps
Issues related to MPS/MPO functionality
In the example page in the documentation it is reported that passing an MPO which is a sum of some MPOs as a vector to the
dmrg
function results in faster computation. For bigger system I found the speedup is non-negligible and I would like to use the same trick for excited states, but the implementation ofdmrg
for this particular case is missing.Minimal runnable code
The first
dmrg
call works as expected, while the second one gives the error reported below.Output of minimal runnable code
Version information
versioninfo()
:using Pkg; Pkg.status("ITensors")
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