Ancillary Gaussian modes activate the potential to witness non-Markovianity

Author:

De Santis DarioORCID,Farina Donato,Mehboudi Mohammad,Acín Antonio

Abstract

Abstract We study how the number of employed modes impacts the ability to witness non-Markovian evolutions via correlation backflows in continuous-variable quantum dynamics. We first prove the existence of non-Markovian Gaussian evolutions that do not show any revivals in the correlations between the mode evolving through the dynamics and a single ancillary mode. We then demonstrate how this scenario radically changes when two ancillary modes are considered. Indeed, we show that the same evolutions can show correlation backflows along a specific bipartition when three-mode states are employed, and where only one mode is subjected to the evolution. These results can be interpreted as a form of activation phenomenon in non-Markovianity detection and are proven for two types of correlations, entanglement and steering, and two classes of Gaussian evolutions, a classical noise model and the quantum Brownian motion model.

Funder

Swiss National Science Foundation NCCR

FUNDACIÓ Privada MIR-PUIG

Spanish Government

Fundacio Cellex

AXA

H2020 European Research Council

Publisher

IOP Publishing

Subject

General Physics and Astronomy

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Pure non-Markovian evolutions;Quantum;2023-09-26

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