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arXiv quant-ph/0511199quant-ph
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Quantum调速器:自动量子控制和减少噪声的影响,无需测量

The Quantum Governor: Automatic quantum control and reduction of the influence of noise without measuring

S. Kallush, R. Kosloff

摘要:

分析了在封闭电路中自动保护量子系统免受噪声干扰的问题。一个通用的方案是从两个步骤建立。首先,引入蒸馏步骤,其中将不需要的组分去除到系统的另一个自由度。随后,采用恢复步骤,系统恢复其初始密度。采用最优控制方法生成提取算子。通过对一个受白噪声影响的二电平字节的仿真,证明了该方案的有效性。与目标的不希望的偏差被证明平均减少了至少两个数量级。并讨论了经典瓦特调速器的量子形式与量子信息场的关系。

英文摘要:

The problem of automatically protecting a quantum system against noise in a closed circuit is analyzed. A general scheme is developed built from two steps. At first, a distillation step is induced in which undesired components are removed to another degree of freedom of the system. Later a recovering step is employed which the system gains back its initial density. An Optimal-Control method is used to generate the distilling operator. The scheme is demonstrated by a simulation of a two level byte influenced by white noise. Undesired deviations from the target were shown to be reduced by at least two orders of magnitude on average. The relations between the quantum version of the classical Watt's Governor and the field of quantum information are also discussed.

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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