Quantum state engineering with twisted photons via adaptive shaping of the pump beam
Quantum state engineering with twisted photons via adaptive shaping of the pump beam
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DOI：
10.1103/physreva.98.060301
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发表时间：
2018-12-12
影响因子：
2.9
通讯作者：
Kulik, S. P.
中科院分区：
文献类型：
--
作者：
Kovlakov, E. V.;Straupe, S. S.;Kulik, S. P.
高维纠缠是量子通信的宝贵资源，在轨道角动量(OAM)中纠缠的光子对通常用于编码高维量子态。然而，制备任意维度的最大纠缠态的方法仍然缺乏，目前使用的方法基本上依赖于过滤和纠缠浓缩。在这里，我们在实验上实现了一种不需要任何这些步骤就可以产生高维最大纠缠OAM态的方法。此外，准备状态被限制在指定维度的子空间，因此需要最小的空间后选择。
High-dimensional entanglement is a valuable resource for quantum communication, and photon pairs entangled in orbital angular momentum (OAM) are commonly used for encoding high-dimensional quantum states. However, methods for the preparation of maximally entangled states of arbitrary dimensionality are still lacking, and currently used approaches essentially rely on filtering and entanglement concentration. Here, we experimentally realize a method for the generation of high-dimensional maximally entangled OAM states of photon pairs which does not require any of these procedures. Moreover, the prepared state is restricted to the subspace of the specified dimensionality, thus requiring minimal spatial postselection.