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arXiv quant-ph/0203008quant-ph
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量子信息的稳定化:统一的动力学-代数方法

Stabilization of Quantum Information: A Unified Dynamical-Algebraic Approach

P. Zanardi

摘要:

对称性的概念被证明是所有纠错/避免策略的核心,用于保持开放量子系统S的量子相干性,例如,量子计算机S的动力学代数的非平凡对称群的存在提供了对退相干免疫的状态空间扇区。这种无噪声的部门,可以被看作是一个非交换版本的指针基础,支持通用的量子计算,并对扰动是强大的。当所需的对称性不存在时,可以人工地通过主动对称化程序来生成它。

英文摘要:

The notion of symmetry is shown to be at the heart of all error correction/avoidance strategies for preserving quantum coherence of an open quantum system S e.g., a quantum computer. The existence of a non-trivial group of symmetries of the dynamical algebra of S provides state-space sectors immune to decoherence. Such noiseless sectors, that can be viewed as a noncommutative version of the pointer basis, are shown to support universal quantum computation and to be robust against perturbations. When the required symmetry is not present one can generate it artificially resorting to active symmetrization procedures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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