Estimating the degree of non-Markovianity using machine learning

TL;DR

This paper demonstrates that machine learning, specifically support vector machines, can accurately estimate the degree of non-Markovianity in open quantum systems using minimal state tomography, offering a practical experimental approach.

Contribution

It introduces a machine learning method to quantify non-Markovianity in quantum systems, reducing the need for extensive measurements compared to traditional techniques.

Findings

Support vector machines accurately estimate non-Markovianity.

The method requires only one or two rounds of state tomography.

Applicable to well-known models of open quantum systems.

Abstract

In the last years, the application of machine learning methods has become increasingly relevant in different fields of physics. One of the most significant subjects in the theory of open quantum systems is the study of the characterization of non-Markovian memory effects that emerge dynamically throughout the time evolution of open systems as they interact with their surrounding environment. Here we consider two well-established quantifiers of the degree of memory effects, namely, the trace distance and the entanglement-based measures of non-Markovianity. We demonstrate that using machine learning techniques, in particular, support vector machine algorithms, it is possible to estimate the degree of non-Markovianity in two paradigmatic open system models with high precision. Our approach can be experimentally feasible to estimate the degree of non-Markovianity, since it requires a single or at most two rounds of state tomography.