Stabilization of Quantum Computations by Symmetrization

1997/10/01 by Adriano Barenco, André Berthiaume, David Deutsch +3 · 20 citations
Computer Science · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Neural Networks and Reservoir Computing

paper · doi:10.1137/s0097539796302452

Abstract

Abstract. We propose a method for the stabilization of quantum computations (including quantum state storage). The method is based on the operation of projection into SYM, the symmetric subspace of the full state space of R redundant copies of the computer. We describe an efficient algorithm and quantum network effecting SYM–projection and discuss the stabilizing effect of the proposed method in the context of unitary errors generated by hardware imprecision, and nonunitary errors arising from external environmental interaction. Finally, limitations of the method are discussed.

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