A correlation measure detecting almost all non-Markovian evolutions

Autor:	De Santis, Dario, Johansson, Markus, Bylicka, Bogna, Bernardes, Nadja K., Acín, Antonio
Rok vydání:	2018
Předmět:	Quantum Physics
Zdroj:	Phys. Rev. A 99, 012303 (2019)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.99.012303
Popis:	We investigate the ability of correlation measures to witness non-Markovian open quantum system dynamics. It is shown that the mutual information and any entanglement measure between the system and an ancilla do not witness all non-Markovian dynamics. A correlation measure is introduced, and it is proven that, in an enlarged setting with two ancillary systems, this measure detects almost all non-Markovian dynamics, except possibly a zero-measure set of dynamics that is non-bijective in finite time-intervals. Our proof is constructive and provides different initial states detecting the non-Markovian evolutions. These states are all separable and some are arbitrarily close to a product state. Comment: 5+7 pages, 1 figure
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1805.00920 Zobrazit plný text záznamu View this record from Arxiv