# Tag Info

## New answers tagged surface-code

1

What is a “temporal” or “timelike” logical error in the surface code? An example of an undetectable timelike error is a stabilizer measurement being consistently wrong. For example, when you initialize your data qubits to be $|0\rangle$, all the X stabilizer measurements project randomly into their +1 or -1 eigenspaces. If one of the X stabilizers happens ...

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I guess you are confusing Stabilizer types. Brown plaquettes(X Stabilizer) & Yellow plaquettes(Z Stabilizer) So if there is Error Z_topleft or Error Z_beneath, it gives same Syndrome. if this is your question, Imagine if there are only Z Error occurred on the Rotated Surface Code ( Figure c). Z_topleft Z_beneath is one of stabilizer. So we can choose ...

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Well I also had a similar issue. As far as I know, when you are considering Lattice Surgery specifically Merging Operation, you get the final output state depending on Measurement result. For applying CNOT operation between two Logical qubits, according to what result(Merging Operation) you get, you decide whether you should apply Logical operator or not. In ...

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