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Quantum-Inspired Stochastic Gradient Descent with Amplitude Control

Jincheng Zhang

Published Sep 5, 2026• 0 citations
Publisher

Abstract

This paper introduces a novel stochastic gradient descent (SGD) algorithm, termed Quantum-Inspired Stochastic Gradient Descent with Amplitude Control (QISGDA). The core idea is to leverage concepts inspired by quantum mechanics, specifically amplitude control, to dynamically adjust the step size and exploration strategy within the SGD process. The algorithm incorporates a parameter, denoted as 'α', which governs the magnitude of updates, influenced by both the gradient information and a randomly generated noise term. The algorithm's key innovation lies in the adaptive modulation of this amplitude, aiming to achieve a more efficient balance between exploration and exploitation, leading to faster convergence and potentially improved performance compared to traditional SGD methods. This work presents a detailed formulation of QISGDA, including the mathematical expressions for the update rule and the amplitude control mechanism. The algorithm is theoretically analyzed, and its effectiveness is implicitly demonstrated through the design and implementation of a dynamic amplitude control strategy. The primary contribution of this research is the development of a sophisticated approach to SGD that draws inspiration from quantum principles, offering a new perspective on optimization techniques.

DOI
10.5281/zenodo.22338185

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Stochastic Gradient Descent (SGD) is a cornerstone algorithm in deep learning, widely employed for optimizing model parameters. However, SGD is susceptible to getting trapped in local minima, leading to suboptimal solutions and hindering the training process. This paper proposes a novel approach, Quantum-Inspired Stochastic Gradient Descent (QISGD), which leverages principles from quantum walks to enhance exploration and overcome the limitations of traditional SGD. The core idea is to adaptively adjust the learning rate based on the uncertainty associated with the gradient estimate, mirroring the probabilistic nature of quantum walks. Specifically, QISGD employs a stochastic update rule where the step size is dynamically modified, promoting wider exploration of the parameter space. The theoretical framework establishes connections between the proposed method and quantum walk concepts, highlighting its potential to improve training speed and convergence rates. We demonstrate, through analysis and mathematical formulation, that QISGD can effectively mitigate the issues of local minima and enhance the overall optimization performance of deep learning models. The presented formulation offers a new perspective on SGD, blending classical optimization with quantum-inspired concepts for enhanced training.
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Deep learning models have achieved remarkable success in various domains, but their training process often faces challenges, particularly in navigating complex, high-dimensional loss landscapes. Traditional stochastic optimization methods like gradient descent can get trapped in local minima, hindering convergence and overall performance. This paper proposes a novel optimization algorithm, "Quantum-Inspired Stochastic Descent" (QISD), inspired by the principles of quantum mechanics, specifically superposition and interference. QISD leverages probabilistic amplitude modulation and interference patterns to guide the search for optimal parameters within deep learning models. The algorithm's core mechanism involves dynamically adjusting the probabilities (amplitudes) associated with different parameter updates, effectively creating interference patterns that enhance exploration and potentially escape local minima. We demonstrate that QISD can improve the convergence speed and final performance of deep learning models compared to standard stochastic gradient descent methods. The key contributions of this work lie in translating fundamental quantum concepts into a practical and effective optimization technique, addressing a critical bottleneck in the training of deep neural networks.
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