On-chip generation of high-order single-photon W-states
On-chip generation of high-order single-photon W-states
复制标题
片上高阶单光子W态的产生
DOI：
10.1038/nphoton.2014.204
复制
发表时间：
2014-10-01
期刊：
影响因子：
35
通讯作者：
Szameit, Alexander
中科院分区：
文献类型：
--
作者：
Graefe, Markus;Heilmann, Rene;Szameit, Alexander
量子叠加是粒子的量子力学性质，它同时占据几个可能的量子态。理想情况下，这种允许的量子态共存，定义在任何自由度上，无论是自旋，频率还是空间，都可以用来充分利用相关物理系统的信息容量。在量子光学中，单光子是光的量子，它们的相干特性使它们能够在大量通道之间建立纠缠叠加，这使得它们有利于实现量子信息处理方案。特别地，单光子W态（即，在多个模式中表现出光子均匀分布的状态）表示一类对耗散高度鲁棒的多体最大纠缠量子态。在这里，我们报告涉及多达16个空间模式的单光子W态的产生和验证，并利用其潜在的多模叠加在芯片上产生真正的随机数。
Quantum superposition is the quantum-mechanical property of a particle whereby it inhabits several of its possible quantum states simultaneously. Ideally, this permissible coexistence of quantum states, as defined on any degree of freedom, whether spin, frequency or spatial, can be used to fully exploit the information capacity of the associated physical system. In quantum optics, single photons are the quanta of light, and their coherence properties allow them to establish entangled superpositions between a large number of channels, making them favourable for realizations of quantum information processing schemes. In particular, single-photon W-states (that is, states exhibiting a uniform distribution of the photons across multiple modes) represent a class of multipartite maximally-entangled quantum states that are highly robust to dissipation. Here, we report on the generation and verification of single-photon W-states involving up to 16 spatial modes, and exploit their underlying multi-mode superposition for the on-chip generation of genuine random numbers.