- class netket.graph.KitaevHoneycomb#
Constructs a honeycomb lattice of a given spatial extent.
Nearest-neighbour edges are coloured according to direction (cf. Kitaev, https://doi.org/10.1016/j.aop.2005.10.005). Periodic boundary conditions can also be imposed. Sites are returned at the 2b Wyckoff positions.
extent – Number of unit cells along each direction, needs to be an array of length 2
bool]]) – If True, the lattice will have periodic boundary conditions (PBC); if False, the lattice will have open boundary conditions (OBC). This parameter can also be a list of booleans with same length as the parameter length, in which case each dimension will have PBC/OBC depending on the corresponding entry of pbc.
kwargs – Additional keyword arguments are passed on to the constructor of netket.graph.Lattice.
- Return type:
Construct a Kitaev honeycomb lattice with 3 × 3 unit cells:
>>> from netket.graph import Honeycomb >>> g = KitaevHoneycomb(extent=[3, 3]) >>> print(g.n_nodes) 18 >>> print(len(g.edges(filter_color=2))) 9