Return a reduced view of mpo even when the site energy is zero
Return a reduced view of mpo even when the site energy is zero


Former-commit-id: 57d949eb2cb9cfffa8e148c6ccf0909dc1ec3e16
DavidAce/DMRG,DavidAce/DMRG,DavidAce/DMRG,DavidAce/DMRG