Quantum error correcting codes based on privacy amplification

Details Quantum error correcting codes based on privacy amplification Quantum error correcting codes based on privacy amplification

2008-08-10

arxiv.org/abs/0808.1392v1

Physics

Quantum Physics

10 pages, 1 figure

Scientific paper

Calderbank-Shor-Steane (CSS) quantum error-correcting codes are based on pairs of classical codes which are mutually dual containing. Explicit constructions of such codes for large blocklengths and with good error correcting properties are not easy to find. In this paper we propose a construction of CSS codes which combines a classical code with a two-universal hash function. We show, using the results of Renner and Koenig, that the communication rates of such codes approach the hashing bound on tensor powers of Pauli channels in the limit of large block-length. While the bit-flip errors can be decoded as efficiently as the classical code used, the problem of efficiently decoding the phase-flip errors remains open.

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