Quantum error correction of coherent errors by randomization

Details Quantum error correction of coherent errors by randomization Quantum error correction of coherent errors by randomization

2004-07-30

arxiv.org/abs/quant-ph/0407262v1

Eur. Phys. J. D 32, 153 (2005)

Physics

Quantum Physics

revtex 4 pages, 3 figs

Scientific paper

10.1140/epjd/e2004-00196-9

A general error correction method is presented which is capable of correcting coherent errors originating from static residual inter-qubit couplings in a quantum computer. It is based on a randomization of static imperfections in a many-qubit system by the repeated application of Pauli operators which change the computational basis. This Pauli-Random-Error-Correction (PAREC)-method eliminates coherent errors produced by static imperfections and increases significantly the maximum time over which realistic quantum computations can be performed reliably. Furthermore, it does not require redundancy so that all physical qubits involved can be used for logical purposes.

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