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arXiv 1102.2465quant-ph
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四光子系统中量子横向关联的控制

Control of quantum transverse correlations on a four-photon system

P. -L. de Assis, M. A. D. Carvalho, L. P. Berruezo, J. Ferraz, I. F. Santos, F. Sciarrino, S. Pádua

摘要:

双光子空间量子关联的控制是量子成像的基本原理之一。到目前为止,实验仅限于通过使用线性光学元件来控制单个双光子的状态。在这项工作中,我们展示了实验控制的量子关联在四光子状态组成的两对光子。我们的方案是基于一个高效率的参数下转换源耦合到一个双缝的可变线性光学设置,以获得空间编码的量子比特。通过改变实验参数,我们得到了纠缠态和可分离态。我们展示了关联对双缝干涉和衍射的影响。

英文摘要:

Control of spatial quantum correlations in bi-photons is one of the fundamental principles of Quantum Imaging. Up to now, experiments have been restricted to controlling the state of a single bi-photon, by using linear optical elements. In this work we demonstrate experimental control of quantum correlations in a four-photon state comprised of two pairs of photons. Our scheme is based on a high-efficiency parametric downconversion source coupled to a double slit by a variable linear optical setup, in order to obtain spatially encoded qubits. Both entangled and separable pairs have been obtained, by altering experimental parameters. We show how the correlations influence both the interference and diffraction on the double slit.

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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