Memory Effects in Quantum Dynamics Modelled by Quantum Renewal Processes

Entropy

Andrea Smirne¹  Manuel Ponzi¹  Bassano Vacchini¹  Nina Megier¹ 

[1] Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, Via Celoria 16, 20133 Milan, Italy;

关键词: open quantum systems;    renewal processes;    memory effects;    master equations;    non-Markovianity;   

DOI  :  10.3390/e23070905

来源: DOAJ

【 摘 要 】

Simple, controllable models play an important role in learning how to manipulate and control quantum resources. We focus here on quantum non-Markovianity and model the evolution of open quantum systems by quantum renewal processes. This class of quantum dynamics provides us with a phenomenological approach to characterise dynamics with a variety of non-Markovian behaviours, here described in terms of the trace distance between two reduced states. By adopting a trajectory picture for the open quantum system evolution, we analyse how non-Markovianity is influenced by the constituents defining the quantum renewal process, namely the time-continuous part of the dynamics, the type of jumps and the waiting time distributions. We focus not only on the mere value of the non-Markovianity measure, but also on how different features of the trace distance evolution are altered, including times and number of revivals.

【 授权许可】

Unknown