arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2201.03700quant-phcs.AI
收藏

量子神经网络的量子激活函数

Quantum activation functions for quantum neural networks

Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche(意大利国家研究委员会光子学与纳米技术研究所);Dipartimento di Fisica, Universitá degli Studi di Milano Bicocca(米兰比可卡大学物理系)

Marco Maronese, Claudio Destri, Enrico Prati

摘要:

人工神经网络领域有望从量子计算机的最新发展中受益。特别是,量子机器学习,一类利用量子位创建可训练神经网络的量子算法,将为解决模式识别,聚类和机器学习等问题提供更多的力量。前馈神经网络的构建块由连接到输出神经元的一层神经元组成,该输出神经元根据任意激活函数被激活。相应的学习算法被称为Rosenblatt感知器。具有特定激活函数的量子感知器是已知的,但是在量子计算机上实现任意激活函数的一般方法仍然缺乏。在这里,我们填补了这一空白的量子算法,它能够近似任何解析激活函数的任何给定的顺序的幂级数。与以前的建议提供不可逆的测量-基于和简化的激活函数,在这里,我们将展示如何近似任何解析函数的任何所需的精度,而不需要测量的状态编码的信息。由于这种结构的通用性,任何前馈神经网络都可以根据Hornik定理获得通用逼近性质。我们的研究结果重塑了门模型量子计算机架构中的人工神经网络科学。

英文摘要:

The field of artificial neural networks is expected to strongly benefit from recent developments of quantum computers. In particular, quantum machine learning, a class of quantum algorithms which exploit qubits for creating trainable neural networks, will provide more power to solve problems such as pattern recognition, clustering and machine learning in general. The building block of feed-forward neural networks consists of one layer of neurons connected to an output neuron that is activated according to an arbitrary activation function. The corresponding learning algorithm goes under the name of Rosenblatt perceptron. Quantum perceptrons with specific activation functions are known, but a general method to realize arbitrary activation functions on a quantum computer is still lacking. Here we fill this gap with a quantum algorithm which is capable to approximate any analytic activation functions to any given order of its power series. Unlike previous proposals providing irreversible measurement--based and simplified activation functions, here we show how to approximate any analytic function to any required accuracy without the need to measure the states encoding the information. Thanks to the generality of this construction, any feed-forward neural network may acquire the universal approximation properties according to Hornik's theorem. Our results recast the science of artificial neural networks in the architecture of gate-model quantum computers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑