Hi Dasari,
Recently I installed alps-2.1.1-r6176-src on my Desktop. For my purpose I need to use multi-orbital weak coupling ctqmc as an impurity solver with in DMFT.
In the alps is it possible to run the dmft with interaction expansion as an impurity solver for multi-orbitals with density-density interactions?
yes, there is a general multi-orbital density-density interaction expansion solver included in ALPS. For this type of interaction the hybridization expansion is typically more efficient. Are you sure that you need the interaction expansion?
The class
MultiBandDensityHubbardInteractionExpansion
implements your density-density interaction expansion, have a look at model.cpp.
If possible can I use it for the finite dimensional lattices(2D or 3D)?
Yes, you can use it for any general density of states.
I have seen examples in the tutorial for multi-orbitals with hybridization solver only.
The reason is the one above: Generally, the hybridization expansion is much more efficient.
Best, Emanuel