Journal
PHYSICAL REVIEW A
Volume 78, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.78.012306
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In this paper, we present a systematic way based on the nonbinary graph state of constructing good nonbinary quantum codes, both additive and nonadditive, for systems with integer dimensions. With a computer search, which results in many interesting codes including some nonadditive codes meeting the Singleton bounds, we are able to construct explicitly four families of optimal codes, namely, [[6,2,3]](p), [[7,3,3]](p), [[8,2,4]](p), and [[8,4,3]](p) for any odd dimension p and a family of nonadditive codes ((5,p,3))(p) for arbitrary p>3. In the case of composite numbers as dimensions, we also construct a family of stabilizer codes ((6,2p(2),3))(2p) for odd p, whose coding subspace is not of a dimension that is a power of the dimension of the physical subsystem.
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