The Largest Cognitive Systems Will be Optoelectronic

J. Shainline
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引用次数: 7

Abstract

Electrons and photons offer complimentary strengths for information processing. Photons are excellent for communication, while electrons are superior for computation and memory. Cognition requires distributed computation to be communicated across the system for information integration. We present reasoning from neuroscience, network theory, and device physics supporting the conjecture that large-scale cognitive systems will benefit from electronic devices performing synaptic, dendritic, and neuronal information processing operating in conjunction with photonic communication. On the chip scale, integrated dielectric waveguides enable fan-out to thousands of connections. On the system scale, fiber and free-space optics can be employed. The largest cognitive systems will be limited by the distance light can travel during the period of a network oscillation. We calculate that optoelectronic networks the area of a large data center (105 m2) will be capable of system-wide information integration at 1 MHz. At frequencies of cortex-wide integration in the human brain (4 Hz, theta band), optoelectronic systems could integrate information across the surface of the earth.
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最大的认知系统将是光电系统
电子和光子为信息处理提供互补的优势。光子在通信方面非常出色,而电子在计算和存储方面则更胜一筹。认知需要分布式计算在整个系统中进行通信,以实现信息集成。我们从神经科学、网络理论和设备物理学的角度进行推理,支持大规模认知系统将受益于电子设备执行突触、树突和神经元信息处理,这些信息处理与光子通信相结合。在芯片规模上,集成的介质波导可以扇形输出数千个连接。在系统尺度上,可以采用光纤和自由空间光学。最大的认知系统将受到光在网络振荡期间所能传播的距离的限制。我们计算出,一个大型数据中心面积(105平方米)的光电网络将能够在1 MHz的频率下进行全系统信息集成。在人类大脑全皮层整合的频率下(4赫兹,θ波段),光电系统可以整合地球表面的信息。
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