Optically Writable Atomic Vapor Memory as a Substrate for Optical Reservoir Computing

2026-08-18

AI Summary

研究通过铯原子蒸气实现光随机存取存储器，利用光学泵浦和探测吸收技术存储与读取信息，作为光学储层计算的物理基底。

Abstract

We present an optical random access memory (ORAM) based on warm cesium (Cs) atomic vapor and demonstrate its operation as the physical substrate of a reservoir computer. Information is stored in the hyperfine population distribution of a Cs ensemble via optical pumping and retrieved through differential probe absorption. Spatial multiplexing via acousto-optic deflection provides eight addressable memory rails able to store up to 3.8 bits of information per rail. Employing this platform as a temporally multiplexed reservoir, we achieve a kernel rank ($\mathrm{KR}= 8.8 \pm 0.4$), and a minimum bit error rate of $0.02 \pm 0.01$ on the Exclusive-or (XOR) benchmark. We find the limited memory lifetime constrains the achievable temporal depth, encouraging further research into fast addressable memories. This constitutes the first demonstration of a free-space, optically writable atomic RAM as a substrate in an optical reservoir computing system.

Problem

• Optical Random Access Memory
• Reservoir Computing
• Cesium Atomic Vapor

Innovation

• Optical Random Access Memory
• Cesium Atomic Vapor
• Reservoir Computing
• Spatial Multiplexing
• Acousto-Optic Deflection