Fault-tolerance of [[6, 1, 3]] non-CSS code family generated using measurements on graph states

Abstract: We construct and analyze the fault tolerance of $[[6,1,3]]$ non-CSS quantum error correcting code under the anisotropic and depolarizing noise models. This rate-optimized code achieves fault-tolerance using a single ancilla qubit for syndrome measurement under anisotropic noise conditions. This method was called fault-tolerance using bare ancilla by Brown \emph{et al.} We give explicit construction of the code using measurements on non-planar graph states. We also argue that using our approach, we can construct a family of such fault-tolerant codes. This method fills a notable gap in constructing fault-tolerant non-CSS code families.