arXiv AI

A Stable Aggregation Method for Quantum Federated Learning

arXiv Machine Learning
Sep 23

Federating Quantum and Classical Computing: A Privacy-Preserving Hybrid Approach

arXiv:2609.25082v1 Announce Type: new Abstract: Quantum machine learning (QML) is increasingly recognized as one of the most promising near-term applications of quantum computing, viewed as a next-fr...

By Carlos Cano, Daniel M. Jimenez-Gutierrez, Diego Sal, Georgios Kellaris, Joaquin del Rio, Oleksii Sliusarenko, Xabi Uribe-Etxebarria
arXiv AI
2d ago

vFedProtoQNAS: Prototype-Guided Personalized Quantum Neural Architecture Search for Virtual Federated Learning

The paper introduces vFedProtoQNAS, a prototype‑guided personalized quantum neural architecture search method for virtual federated learning. It allows each client to independently design and train a device‑specific quantum neural network while avoiding parameter aggregation across structurally different models. Instead, clients share class‑wise latent prototypes, which are refined using global prototypes from the server to serve as federated semantic anchors, leading to a 3.70% accuracy improvement over FedAvg.

By Seok Bin Son, Samuel Yen-Chi Chen, Soohyun Park, Joongheon Kim
arXiv Machine Learning
Sep 17

Learning to Program Adaptive Non-Local Observables for Machine Learning

The paper introduces QFWP-ANO, a quantum neural network architecture that uses a classical hypernetwork to program variational quantum circuit parameters and non‑local observables conditioned on each input. Unlike existing adaptive non‑local observable (ANO) methods that learn a single static observable, QFWP-ANO dynamically adapts to each input. Experiments on multivariate time‑series forecasting and reinforcement learning tasks show that QFWP-ANO outperforms traditional ANO‑based VQCs and other strong baselines, achieving the lowest mean‑squared error in most settings.

By Yu-Ting Lee, Samuel Yen-Chi Chen, Huan-Hsin Tseng
arXiv Machine Learning
Aug 31

Quantum Federated Learning Based on Bures--Uhlmann Geometry for Heterogeneous Noisy Clients

The paper proposes a quantum federated learning framework that extends parameter-space geometry to mixed states, using the Bures metric as a local preconditioner and the mean Uhlmann curvature to create an aggregation rule that down‑weights unreliable clients. It provides theoretical convergence guarantees and demonstrates through trapped‑ion quantum emulator experiments that the method retains high accuracy under device heterogeneity and outperforms standard federated averaging, which suffers under strong noise.

By Haruki Emori, Masaki Uchihara, Yuuki Tokunaga
arXiv Machine Learning
1d ago

Neural Fourier Surrogates for Data Reuploading Quantum Neural Networks

The paper introduces Neural Fourier Surrogates (NFS), a stochastic classical neural network that learns coefficients over a finite Fourier series support similar to quantum neural networks (QNNs). By testing on tabular benchmark datasets, NFS demonstrates competitive classification performance against established classical baselines and data‑reuploading QNNs. The authors also compare the learned Fourier spectra of QNNs and NFS on synthetic data, positioning NFS as a natural classical baseline for evaluating QNN performance.

By Oliver Knitter, Jonathan Mei, Sang Hyub Kim, Chi Chen, Masako Yamada, Martin Roetteler