图像的量子存储器-量子全息图
Quantum memory for images - a quantum hologram
摘要：
物质-光量子接口和光量子存储是量子信息协议的重要组成部分，如量子网络，分布式量子计算等。在这封信中，我们提出了一个空间多模方案的光量子存储，我们称之为量子全息图。我们的方法使用多原子系综，这已被证明是有效的单空间模式量子存储器。由于系综的多原子性质，它能够存储许多空间模式，这是本提案的关键特征。与经典全息图相比，量子全息图具有更高的存储容量，并且能够存储图像的量子特征，例如多模叠加和纠缠量子态，这是标准全息图无法实现的。由于光学平行性，量子全息图的信息容量将明显超过单模方案。
英文摘要：
Matter-light quantum interface and quantum memory for light are important ingredients of quantum information protocols, such as quantum networks, distributed quantum computation, etc. In this Letter we present a spatially multimode scheme for quantum memory for light, which we call a quantum hologram. Our approach uses a multi-atom ensemble which has been shown to be efficient for a single spatial mode quantum memory. Due to the multi-atom nature of the ensemble it is capable of storing many spatial modes, a feature critical for the present proposal. A quantum hologram has a higher storage capacity compared to a classical hologram, and is capable of storing quantum features of an image, such as multimode superposition and entangled quantum states, something that a standard hologram is unable to achieve. Due to optical parallelism, the information capacity of the quantum hologram will obviously exceed that of a single-mode scheme.
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