More architecture options, some helper functions #105
Merged
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This PR upstreams some of the changes implemented by @Aerylia in CQCL/pyzx while working for Cambridge Quantum.
This first PR adds 9 new architecture options, including some sparse IBM processors and Google's Sycamore. It also adds some helper functions and typing hints.
Changes
Adds optional
qubit_map
andreduce_order
parameters to an Architecture, to separate the qubit identifiers from the internal vertex index representation.The reduce_order is used by the Steiner tree algorithms. It is computed automatically when not given.
Adds helper methods to find non-cutting nodes, and shortest paths.
Streamlines the steiner_tree implementation.
Adds some type annotations to the architecture module, and fixes mypy errors.