Topological quantum codes from lattices partition on the n-dimensional flat tori

Abstract

In this work, we show that an n-dimensional sublattice Λ′ = mΛ of an n-dimensional lattice Λ induces a G = Znm tessellation in the flat torus Tβ′ = Rn/Λ′, where the group G is isomorphic to the lattice partition Λ/Λ′ . As a consequence, we obtain, via this technique, toric codes of parameters [[2m2, 2, m]], [[3m3, 3, m]] and [[6m4, 6, m2 ]] from the lattices Z2, Z3 and Z4, respectively. In particular, for n = 2, if Λ1 is either the lattice Z2 or a hexagonal lattice, through lattice partition, we obtain two equivalent ways to cover the fundamental cell P′0of each hexagonal sublattice Λ′ of hexagonal lattices Λ, using either the fundamental cell P0 or the Voronoi cell V0 . These partitions allow us to present new classes of toric codes with parameters [[3m2, 2, m]] and color codes with parameters [[18m2, 4, 4m]] in the flat torus from families of hexagonal lattices in R2 .