Cyclic quantum code

Cyclic quantum code[1]

Description

A block quantum code such that cyclic permutations of the subsystems leave the codespace invariant. In other words, the automorphism group of the code contains the cyclic group \(\mathbb{Z}_n\).

An example \([[17,9,4]]\) cyclic Hermitian qubit code is spanned by cyclic shifts of the Pauli operators \(XXYIXYZZYXIYXXIII\) and \(ZZXIZXYYXZIXZZIII\). An example \([[17,1,7]]\) Hermitian qubit code is spanned by cyclic shifts of the Pauli operators \(XYYIZZIYYXIIIIIII\) and \(ZXXIYYIXXZIIIIIII\).

Protection

Cyclic symmetry guarantees that if a single subsystem is protected against some noise, then all other subsystems are also.

Encoding

Linear feedback shift registers [2].

Decoding

Linear feedback shift registers [2].Adapted from the Berlekamp decoding algorithm for classical BCH codes [1].

Notes

Many examples have been found by computer algebra programs. Ref. [1] give examples of \([[17,1,7]]\) and \([[17,9,3]]\) quantum cyclic codes.

Cousins

Cyclic code
\([[7,1,3]]\) Steane code— The Steane code is equivalent to a cyclic code via qubit permutations [3; Exam. 1].

Member of code lists

Primary Hierarchy

Quantum Domain

Quantum code

Approximate operator-algebra QECC

Operator-algebra QECC (OAQECC)

Quantum error-correcting code (QECC)

Block quantum code

Quasi-cyclic quantum code

Parents

Quasi-cyclic quantum code

Cyclic quantum code

Children

Five-rotor code

\([[5,1,3]]_{\mathbb{R}}\) Braunstein five-mode code

Permutation-invariant (PI) code

The cyclic group of these codes is a subgroup of the \(S_n\) symmetric group used in permutation invariant codes.

\(((5,6,2))\) qubit code

\(((9,12,3))\) qubit code

La-cross code

Twisted XZZX toric code

\([[5,1,3]]_{\mathbb{Z}_q}\) modular-qudit code

Frobenius code

\([[5,1,3]]_q\) Galois-qudit code

References

[1]: S. Dutta and P. P. Kurur, “Quantum Cyclic Code”, (2010) arXiv:1007.1697
[2]: M. Grassl and T. Beth, “Cyclic quantum error–correcting codes and quantum shift registers”, Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences 456, 2689 (2000) arXiv:quant-ph/9910061 DOI
[3]: A. A. Kovalev, I. Dumer, and L. P. Pryadko, “Design of additive quantum codes via the code-word-stabilized framework”, Physical Review A 84, (2011) arXiv:1108.5490 DOI

Page edit log

Simon Burton (2024-08-12) — most recent
Victor V. Albert (2024-08-12)
Victor V. Albert (2021-12-16)
Nolan Coble (2021-12-15)

Cite as:

“Cyclic quantum code”, The Error Correction Zoo (V. V. Albert & P. Faist, eds.), 2024. https://errorcorrectionzoo.org/c/quantum_cyclic

Github: https://github.com/errorcorrectionzoo/eczoo_data/edit/main/codes/quantum/properties/block/symmetric/quantum_cyclic.yml.