Distillation of quantum non-Markovianity

TL;DR

This paper introduces an operational framework to enhance the detection of non-Markovianity in qubit dynamics by distilling it from multiple copies of quantum channels, potentially amplifying information backflow effects.

Contribution

It presents a novel method to distill non-Markovianity in quantum channels, improving the ability to observe information backflow in open quantum systems.

Findings

Distillation can amplify non-Markovian effects.

Framework applicable to multiple copies of quantum channels.

Enhances detection of quantum information backflow.

Abstract

Non-Markovianty of open quantum systems dynamics is a physically relevant property which is usually associated with the backflow of (quantum) information. Using this paradigmatic marker, we develop an operational framework to investigate how non-Markovianity for qubit dynamics can be distilled when many copies of the channels are used, possibly allowing for a stronger effect on the backflow of information.