Single-qubit universal classifier implemented on an ion-trap quantum device

TL;DR

This paper demonstrates the first experimental implementation of a single-qubit quantum classifier on an ion-trap device using the re-uploading scheme, showing competitive performance in classifying complex tasks.

Contribution

It introduces the first experimental realization of a single-qubit universal classifier using ion-trap technology with the re-uploading scheme.

Findings

Successful classification of non-trivial tasks

Benchmarking shows competitive performance

Combines simulation and experiment for training

Abstract

Quantum computers can provide solutions to classically intractable problems under specific and adequate conditions. However, current devices have only limited computational resources, and an effort is made to develop useful quantum algorithms under these circumstances. This work experimentally demonstrates that a single-qubit device can host a universal classifier. The quantum processor used in this work is based on ion traps, providing highly accurate control on small systems. The algorithm chosen is the re-uploading scheme, which can address general learning tasks. Ion traps suit the needs of accurate control required by re-uploading. In the experiment here presented, a set of non-trivial classification tasks are successfully carried. The training procedure is performed in two steps combining simulation and experiment. Final results are benchmarked against exact simulations of the same method and also classical algorithms, showing a competitive performance of the ion-trap quantum classifier. This work constitutes the first experimental implementation of a classification algorithm based on the re-uploading scheme.