tqec.computation.correlation.find_correlation_surfaces#

find_correlation_surfaces(zx_graph: ZXGraph) → list[CorrelationSurface][source]#

Find the correlation surfaces in the ZX graph.

The algorithm starts from each leaf node in the graph, and find the correlation surfaces using the flood fill like algorithm.

For Z/X type node, the correlation surface must start from the opposite type node. For the Port, the correlation surface can start from both X/Z type node. For the Y type node, the correlation surface must be the product of the X and Z type.

Parameters:: zx_graph – The ZX graph to find the correlation surfaces.
Returns:: A list of CorrelationSurface in the graph.