class triqs.sumk.sumk_discrete_from_lattice.SumkDiscreteFromLattice(lattice, patch=None, n_points=8, method='Riemann')[source]
  • Computes

\[G \leftarrow \sum_k (\omega + \mu - \epsilon_k - \Sigma(k,\omega))^{-1}\]

for GF functions with blocks of the size of the matrix eps_k with a discrete sum.

  • The object contains the discretized hoppings and points in the arrays hopping, bz_points,bz_weights,mu_pattern,overlap (IF non orthogonal) It can also generate a grid (ReComputeGrid) for a regular grid or a Gauss-Legendre sum for the whole Brillouin Zone or a patch of the BZ.


Recompute_Grid(n_points[, method, Q])

(Re)Computes the grid on the patch given at construction:

__init__(lattice[, patch, n_points, method])

param lattice:

The underlying triqs.lattice or triqs.super_lattice provinding t(k)


Returns the number of k points


Just constructs the arrays, but without initializing them - nk: total number of k points



Returns the ONLY block indices accepted for the G and Sigma argument of the SumK function