Fault tolerant surface code simulations.

Surface code simulations for a distributed implementation using considering NV centers for the quantum nodes.

The simulations depend first on the creation of GHZ states from which a error model can be obtained see decomposition/. The simulations rely on Kolmogorov's implementation of the Blossom algorithm : Blossom V for the decoder.

Files:

• surface_code.py : Main class for the surface code. Contains all relevant functions required for measuring noisy stabilizers and applying the corrections given by the decoder.
• layers.py : Class for embedding a surface code object, that allows for recording several continuous stabilizer measurements as required when doing imperfect measurements.
• matching.py : Functions for interacting with the decoder. This included transforming the measurements into the graphs required.
• result_* : Code for obtaining results/testing the simulations.