  Topological quantum error correction codes are currently among the most
promising candidates for efficiently dealing with the decoherence effects
inherently present in quantum devices. Numerically, their theoretical error
threshold can be calculated by mapping the underlying quantum problem to a
related classical statistical-mechanical spin system with quenched disorder.
Here, we present results for the general fault-tolerant regime, where we
consider both qubit and measurement errors. However, unlike in previous
studies, here we vary the strength of the different error sources
independently. Our results highlight peculiar differences between toric and
color codes. This study complements previous results published in New J. Phys.
13, 083006 (2011).
