# How to handle with 1-D Bose-Fermi mixture by using DMRG with iTensor

retagged Feb 8

Hello, I'm currently considering a 1-D Bose-Fermi spinor mixture system, in which fermion is spin-1/2 and boson is spin-1 and soft(not hard core).

I have noticed this nice answer: http://itensor.org/support/118/constructing-sites-chain-alternating-bosonic-degrees-freedom which consider a similar question. Is this strategy also applicable for my problems ? That is, I just need to write my own SiteSet file to define the lattice model I consider. Nothing needs to be changed to AutoMPO and MPO or DMRG function itself when I construct my Hamiltonian and do the calculation.

By the way, is there any other way to construct this 1-D B-F mixture ? For example, we may treat this 1-D lattice as a connected 1-D ladder with one of this being spin-1 and other being spin-1/2, just as the example given in the tutorial of iTensor.

Thanks ! PS: iTensor is really a fascinating MPS library with simple data structure.