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1 vote

Necessity for discarding errored magic state distillation

The reason you discard them is because this makes distillation much more efficient. For example, consider 15-to-1 T state distillation using the Reed-Solomon code. This code has distance 3, so you can ...
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2 votes

How does moving qubits on the surface code not change the logical state

Let's assume that we do the move without any errors. We denote the state before the move as $|\psi_L\rangle$, so that $$ Z_L|\psi_L\rangle=|\psi'_L\rangle \\ X_L|\psi_L\rangle=|\psi''_L\rangle \\ $$ ...
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