New Quantum Codes from CSS Code

08/10/2022

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by   Markus Grassl, et al.

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We present a new propagation rule for CSS codes. Starting with a CSS code [[n,k,d]]_q, we construct a CSS code with parameters [[n-2,k,d-1]]_q. In general, one would only obtain a code with parameters [[n-2,k,d-2]]_q. The construction applies to asymmetric quantum codes from the CSS construction as well.