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arXiv 1303.2045quant-ph
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有色控制噪声下的最优动态解耦

Optimal dynamical decoupling in the presence of colored control noise

Ido Almog, Gil Loewenthal, Jonathan Coslovsky, Yoav Sagi, Nir Davidson

摘要:

耦合到噪声环境的量子系统的最佳动态解耦还必须考虑控制脉冲的缺陷。我们提出了一种新的形式主义,它描述了,在一个封闭的形式表达,系统的演变,包括环境和控制噪声的频谱函数。我们表明,通过测量这些谱函数,我们的表达式可以用来优化去耦脉冲序列。我们证明了这种方法与光学捕获超冷铷原子的合奏,并使用量子过程层析成像来识别环境的影响和控制噪声。我们的方法是适用的和重要的任何现实实现的量子信息处理。

英文摘要:

An optimal dynamical decoupling of a quantum system coupled to a noisy environment must take into account also the imperfections of the control pulses. We present a new formalism which describes, in a closed-form expression, the evolution of the system, including the spectral function of both the environment and control noise. We show that by measuring these spectral functions, our expression can be used to optimize the decoupling pulse sequence. We demonstrate this approach with an ensemble of optically trapped ultra-cold Rubidium atoms, and use quantum process tomography to identify the effect of the environment and control noise. Our approach is applicable and important for any realistic implementation of quantum information processing.

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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