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arXiv 1004.2297quant-ph
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两个空间量子系统未知态的快速纠缠检测

Fast entanglement detection for unknown states of two spatial qutrits

G. Lima, E. S. Gómez, A. Vargas, R. O. Vianna, C. Saavedra

摘要:

我们研究了Maciel等人提出的方法的实用性。80,032325(2009)],用于检测两个空间量子(3维量子系统)的纠缠,其被编码在通过多狭缝孔径传输的单个光子的离散横向动量中。该方法是基于通过投影测量获取量子态的部分信息,并用半定态程序进行数据处理分析。这种分析依赖于逐渐产生一个最佳的纠缠见证算子,数值研究表明,它允许的纠缠检测的未知状态的成本远低于全态层析。

英文摘要:

We investigate the practicality of the method proposed by Maciel et al. [Phys. Rev. A. 80, 032325(2009)] for detecting the entanglement of two spatial qutrits (3-dimensional quantum systems), which are encoded in the discrete transverse momentum of single photons transmitted through a multi-slit aperture. The method is based on the acquisition of partial information of the quantum state through projective measurements, and a data processing analysis done with semi-definite programs. This analysis relies on generating gradually an optimal entanglement witness operator, and numerical investigations have shown that it allows for the entanglement detection of unknown states with a cost much lower than full state tomography.

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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