Because of non-zero amplitude of vacuum quantum fluctuation of quantum neural network, a physical limit is appeared, which will restrict the design of quantum neural apparatus, quantum neural network computation, and memory and pick-up for quantum neural information systems. 这个幅度值是设计量子神经电子器件,并基于量子神经网络器件进行量子神经计算、量子神经信息存储与提取的物理限制。