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6288873 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | import jax.numpy as jnp
from jax import jit
from varipeps.contractions import apply_contraction_jitted
class Overlap_Single_Site:
@staticmethod
@jit
def calc_overlap(unitcell):
density_matrix = apply_contraction_jitted(
"density_matrix_one_site",
[unitcell[0, 0][0][0].tensor],
[unitcell[0, 0][0][0]],
[],
)
norm_with_site = jnp.trace(density_matrix)
norm_corners = apply_contraction_jitted(
"overlap_one_site_only_corners",
[unitcell[0, 0][0][0].tensor],
[unitcell[0, 0][0][0]],
[],
)
norm_horizontal = apply_contraction_jitted(
"overlap_one_site_only_transfer_horizontal",
[unitcell[0, 0][0][0].tensor],
[unitcell[0, 0][0][0]],
[],
)
norm_vertical = apply_contraction_jitted(
"overlap_one_site_only_transfer_vertical",
[unitcell[0, 0][0][0].tensor],
[unitcell[0, 0][0][0]],
[],
)
return (norm_with_site * norm_corners) / (norm_horizontal * norm_vertical)
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