Nonbinary Codeword Stabilized Quantum Codes

Details Nonbinary Codeword Stabilized Quantum Codes Nonbinary Codeword Stabilized Quantum Codes

2008-08-22

arxiv.org/abs/0808.3086v1

Phys. Rev. A 78, 062315 (2008)

Physics

Quantum Physics

7 pages, no figure

Scientific paper

10.1103/PhysRevA.78.062315

The codeword stabilized (CWS) quantum codes formalism presents a unifying approach to both additive and nonadditive quantum error-correcting codes (arXiv:0708.1021 [quant-ph]), but only for binary states. Here we generalize the CWS framework to the nonbinary case (of both prime and nonprime dimension) and map the search for nonbinary quantum codes to a corresponding search problem for classical nonbinary codes with specific error patterns. We show that while the additivity properties of nonbinary CWS codes are similar to the binary case, the structural properties of the nonbinary codes differ substantially from the binary case, even for prime dimensions. In particular, we identify specific structure patterns of stabilizer groups, based on which efficient constructions might be possible for codes that encode more dimensions than any stabilizer codes of the same length and distance; similar methods cannot be applied in the binary case. Understanding of these structural properties can help prune the search space and facilitate the identification of good nonbinary CWS codes.

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