Stim simulation of the surface code

• compute Threshold physical error rate: For each given lattice dimension: Plot logical error rate as a function of physical qubit error rate.

• Surface code;

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₀   ₁    ₂    ₃   ₄  
Ⓧ   o   Ⓧ   o   Ⓧ 
₅    ₆    ₇    ₈   ₉ 
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₁₀   ₁₁   ₁₂   ₁₃   ₁₄