神经形态工程学
硫系化合物
计算机科学
计算
赫比理论
强化学习
乘法(音乐)
计算机体系结构
电子工程
计算机工程
作者
Syed Ghazi Sarwat,Timoleon Moraitis,C. David Wright,Harish Bhaskaran
标识
DOI:10.1038/s41467-022-29870-9
摘要
Neuromorphic hardware that emulates biological computations is a key driver of progress in AI. For example, memristive technologies, including chalcogenide-based in-memory computing concepts, have been employed to dramatically accelerate and increase the efficiency of basic neural operations. However, powerful mechanisms such as reinforcement learning and dendritic computation require more advanced device operations involving multiple interacting signals. Here we show that nano-scaled films of chalcogenide semiconductors can perform such multi-factor in-memory computation where their tunable electronic and optical properties are jointly exploited. We demonstrate that ultrathin photoactive cavities of Ge-doped Selenide can emulate synapses with three-factor neo-Hebbian plasticity and dendrites with shunting inhibition. We apply these properties to solve a maze game through on-device reinforcement learning, as well as to provide a single-neuron solution to linearly inseparable XOR implementation.
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