heisenberg_square_4x4.yaml

basis:
  number_spins: 16
  hamming_weight: 8
  spin_inversion: 1
  symmetries:
    # Initial layout:
    # - permutation: [ 0,  1,  2,  3,
    #                  4,  5,  6,  7,
    #                  8,  9, 10, 11,
    #                 12, 13, 14, 15]
    #
    # Translation along x-axis
    - permutation: [ 1,  2,  3,  0,
                     5,  6,  7,  4,
                     9, 10, 11,  8,
                    13, 14, 15, 12]
      sector: 0
    # Translation along y-axis
    - permutation: [ 4,  5,  6,  7,
                     8,  9, 10, 11,
                    12, 13, 14, 15,
                     0,  1,  2,  3]
      sector: 0
    # Reflection along x-axis (i.e. around y-axis)
    - permutation: [ 3,  2,  1,  0,
                     7,  6,  5,  4,
                    11, 10,  9,  8,
                    15, 14, 13, 12]
      sector: 0
    # Reflection along y-axis (i.e. around x-axis)
    - permutation: [12, 13, 14, 15,
                     8,  9, 10, 11,
                     4,  5,  6,  7,
                     0,  1,  2,  3]
      sector: 0
    # Rotation
    - permutation: [ 3,  7, 11, 15,
                     2,  6, 10, 14,
                     1,  5,  9, 13,
                     0,  4,  8, 12]
      sector: 0
hamiltonian:
  name: "Heisenberg Hamiltonian"
  terms:
    - matrix: [[1,  0,  0,  0],
               [0, -1,  2,  0],
               [0,  2, -1,  0],
               [0,  0,  0,  1]]
      sites: [[0, 1], [0, 4], [1, 2], [1, 5], [2, 3], [2, 6], [3, 0], [3, 7],
              [4, 5], [4, 8], [5, 6], [5, 9], [6, 7], [6, 10], [7, 4], [7, 11],
              [8, 9], [8, 12], [9, 10], [9, 13], [10, 11], [10, 14], [11, 8], [11, 15],
              [12, 13], [12, 0], [13, 14], [13, 1], [14, 15], [14, 2], [15, 12], [15, 3]]
observables: []
number_vectors: 2
output: "data/heisenberg_square_4x4.h5"
datatype: "float32"
max_primme_block_size: 4
max_primme_basis_size: 20