-Linear and -Linear Qudit Codes From Dual-Containing Classical Codes

PJ Nadkarni, SS Garani - IEEE Transactions on Quantum …, 2021 - ieeexplore.ieee.org
IEEE Transactions on Quantum Engineering, 2021ieeexplore.ieee.org
Quantum code construction from two classical codes and over the field (is prime and is an
integer) satisfying the dual containing criteria using the Calderbank–Shor–Steane (CSS)
framework is well-studied. We show that the generalization of the CSS framework for qubits
to qudits yields two different classes of codes, namely, the-linear CSS codes and the well-
known-linear CSS codes based on the check matrix-based definition and the coset-based
definition of CSS codes over qubits. Our contribution to this article are three-folds. 1) We …
Quantum code construction from two classical codes and over the field ( is prime and is an integer) satisfying the dual containing criteria using the Calderbank–Shor–Steane (CSS) framework is well-studied. We show that the generalization of the CSS framework for qubits to qudits yields two different classes of codes, namely, the -linear CSS codes and the well-known -linear CSS codes based on the check matrix-based definition and the coset-based definition of CSS codes over qubits. Our contribution to this article are three-folds. 1) We study the properties of the -linear and -linear CSS codes and demonstrate the tradeoff for designing codes with higher rates or better error detection and correction capability, useful for quantum systems. 2) For -linear CSS codes, we provide the explicit form of the check matrix and show that the minimum distances and are equal to and , respectively, if and only if the code is nondegenerate. 3) We propose two classes of quantum codes obtained from the codes and , where one code is an -linear code ( divides ) and the other code is obtained from a particular subgroup of the stabilizer group of the -linear CSS code. Within each class of codes, we demonstrate the tradeoff between higher rates and better error detection and correction capability.
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