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arXiv 0904.4663quant-ph
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制备在量子过程层析成像中的作用

The role of preparation in quantum process tomography

Kavan Modi, E. C. G. Sudarshan

摘要:

在最近的一封信中,我们中的一个人指出了量子实验准备程序的差异如何导致实验结果的重大差异。这种差异源于系统与环境之间的初始相关性。因此,任何容易受到环境影响的量子实验都必须精心准备。在本文中,我们研究量子过程层析成像在这方面。我们建议几个实验设置,其中初始状态的准备在实验的最终结果中起着作用。我们表明,通过研究的线性度和积极性所产生的地图,实验者可以确定系统和环境之间的初始相关性的性质。

英文摘要:

In a recent letter one of us pointed out how differences in preparation procedures for quantum experiments can lead to non-trivial differences in the results of the experiment. The difference arise from the initial correlations between the system and environment. Therefore, any quantum experiment that is prone to the influences from the environment must be prepared carefully. In this paper, we study quantum process tomography in light of this. We suggest several experimental setups, where preparation of initial state plays a role on the final outcome of the experiment. We show that by studying the linearity and the positivity of the resulting maps the experimenter can determine the nature of the initial correlations between the system and the environment.

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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