Comparative study of non-Markovianity measures in exactly solvable one and two qubit models

Autor: Addis, C., Bylicka, B., Chruściński, D., Maniscalco, S.
Rok vydání: 2014
Předmět:
Zdroj: Physical Review A, 90, 052103 (2014)
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevA.90.052103
Popis: In this paper we present a detailed critical study of several recently proposed non-Markovianity measures. We analyse their properties for single qubit and two-qubit systems in both pure-dephasing and dissipative scenarios. More specifically we investigate and compare their computability, their physical meaning, their Markovian to non-Markovian crossover, and their additivity properties with respect to the number of qubits. The bottom-up approach that we pursue is aimed at identifying similarities and differences in the behavior of non-Markovianity indicators in several paradigmatic open system models. This in turn allows us to infer the leading traits of the variegated phenomenon known as non-Markovian dynamics and, possibly, to grasp its physical essence.
Comment: 20 pages, 6 figures. *These two authors contributed equally to this work. Previously known as, "What we talk about when we talk about non-Markovianity"
Databáze: arXiv