Detection of nonlocal superpositions

Detection of nonlocal superpositions
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非局部叠加的检测

DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Pádua
S. Pádua
中科院分区：
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文献类型：
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作者：
A. J. Gutiérrez;W. Pimenta;B. Marques;A. Matoso;J. Sperling;W. Vogel;S. Pádua

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本文从理论和实验两方面研究了量子相关辐射场施密特数的验证。这种纠缠的度量计算了描述复合量子系统所需的产品状态的全局叠加的数量。为了揭示该测度的某个值，构造了一组纠缠数和施密特数检验。实现了对整个证人等级的测量。通过产生一个路径纠缠的双光子态，我们证明了直接计数量子叠加态的可行性。
We study in theory and experiment the verification of the Schmidt number of quantum correlated radiation fields. This measure of entanglement counts the number of global superpositions of product states which are needed to describe a compound quantum system. For unraveling a certain value of this measure, a family of entanglement and Schmidt number tests is constructed. The measurement of the whole class of witnesses is realized. By generating a path entangled two-photon state, we demonstrate the feasibility to directly count quantum superpositions.