For a 12 site chain, I tried to multiply
model.lat.unit_cell = model.lat.unit_cell*12
and assign different values of
t(i) (i = 1, 12)
to each of the element of unit cell. But that is not matching with exact diagonalization results.model.lat.unit_cell = model.lat.unit_cell*12
t(i) (i = 1, 12)
to each of the element of unit cell. But that is not matching with exact diagonalization results.unit_cell
, if the kind of sites (Fermions with or without spin, Bosons, spins,...) doesn't change.t
which is not just a single number, but an array, specifying at which site you want hopping with which strength.