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- from abp.fancy import GraphState
- from abp.util import xyz
- import numpy as np
- import time
- import itertools
- import networkx as nx
-
- threedee_unit_cell = (
- (( 0, 0, 0), (0, 1, 0)),
- (( 0, 0, 0), (1, 0, 0)),
- (( 1, 0, 0), (1, 1, 0)),
- (( 0, 1, 0), (1, 1, 0)),
-
- (( 0, 0, 1), (0, 1, 1)),
- (( 0, 0, 1), (1, 0, 1)),
- (( 1, 0, 1), (1, 1, 1)),
- (( 0, 1, 1), (1, 1, 1)),
-
- (( 0, 0, 0), (0, 0, 1)),
- (( 0, 1, 0), (0, 1, 1)),
- (( 1, 0, 0), (1, 0, 1)),
- (( 1, 1, 0), (1, 1, 1))
- )
-
- def add_offset(vector, offset):
- """ Offset a vector in n-dimensional space """
- return tuple(v + o for v, o in zip(vector, offset))
-
-
- def offset_unit_cell(unit_cell, offset):
- """ Offset a unit cell """
- return {(add_offset(a, offset), add_offset(b, offset)) for a, b in unit_cell}
-
-
- def lattice(unit_cell, size):
- """ Generate a lattice from a unit cell """
- edges = set()
- for offset in itertools.product(*map(range, size)):
- edges |= offset_unit_cell(unit_cell, offset)
-
- nodes = set(itertools.chain(*edges))
- return nodes, edges
-
- nodes, edges = lattice(threedee_unit_cell, (3, 3, 3))
-
- psi = GraphState()
- for node in nodes:
- psi.add_node(str(node), position=xyz(*node))
- psi.act_hadamard(str(node))
-
- for edge in edges:
- psi.act_cz(str(edge[0]), str(edge[1]))
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