GraphDecoder

class GraphDecoder(code, S=None)

Class to construct the graph corresponding to the possible syndromes of a quantum error correction code, and then run suitable decoders.

Parameters

• code (RepitionCode) – The QEC Code object for which this decoder will be used.

• S (networkx.Graph) – Graph describing connectivity between syndrome elements. Will be generated automatically if not supplied.

Additional information:

The decoder for the supplied code is initialized by running _make_syndrome_graph(). Since this process can take some time, it is also possible to load in a premade S. However, if this was created for a differently defined code, it won’t work properly.

Methods

GraphDecoder.get_logical_prob(results[, …])	param results A results dictionary, as produced by the
GraphDecoder.make_error_graph(string[, …])	param string A string describing the output from the code.
GraphDecoder.matching(string)	param string A string describing the output from the code.
GraphDecoder.weight_syndrome_graph(results)	Generate weighted syndrome graph from result counts.