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- W1982481617 abstract "A quantum code is a subspace of a Hilbert space of a physical system chosen to be correctable against a given class of errors, where information can be encoded. Ideally, the quantum code lies within the ground space of the physical system. When the physical model is the Heisenberg ferromagnet in the absence of an external magnetic field, the corresponding ground-space contains all permutation-invariant states. We use techniques from combinatorics and operator theory to construct families of permutation-invariant quantum codes. These codes have length proportional to $t^2$; one family of codes perfectly corrects arbitrary weight $t$ errors, while the other family of codes approximately correct $t$ spontaneous decay errors. The analysis of our codes' performance with respect to spontaneous decay errors utilizes elementary matrix analysis, where we revisit and extend the quantum error correction criterion of Knill and Laflamme, and Leung, Chuang, Nielsen and Yamamoto." @default.
- W1982481617 created "2016-06-24" @default.
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- W1982481617 date "2014-12-10" @default.
- W1982481617 modified "2023-10-18" @default.
- W1982481617 title "Permutation-invariant quantum codes" @default.
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- W1982481617 doi "https://doi.org/10.1103/physreva.90.062317" @default.
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