Quantum-Inspired Tensor Neural Networks for Option Pricing
This addresses computational bottlenecks in financial pricing models like the Heston model, offering incremental improvements in efficiency for domain-specific applications.
The paper tackles the curse of dimensionality in solving high-dimensional PDEs for option pricing by introducing Tensor Neural Networks (TNN) and Tensor Network Initializer (TNN Init), achieving significant parameter savings and faster training while maintaining accuracy compared to classical Dense Neural Networks.
Recent advances in deep learning have enabled us to address the curse of dimensionality (COD) by solving problems in higher dimensions. A subset of such approaches of addressing the COD has led us to solving high-dimensional PDEs. This has resulted in opening doors to solving a variety of real-world problems ranging from mathematical finance to stochastic control for industrial applications. Although feasible, these deep learning methods are still constrained by training time and memory. Tackling these shortcomings, Tensor Neural Networks (TNN) demonstrate that they can provide significant parameter savings while attaining the same accuracy as compared to the classical Dense Neural Network (DNN). In addition, we also show how TNN can be trained faster than DNN for the same accuracy. Besides TNN, we also introduce Tensor Network Initializer (TNN Init), a weight initialization scheme that leads to faster convergence with smaller variance for an equivalent parameter count as compared to a DNN. We benchmark TNN and TNN Init by applying them to solve the parabolic PDE associated with the Heston model, which is widely used in financial pricing theory.