Non-Markovian effects on quantum-communication protocols

Autor:	Choo Hiap Oh, Jun-Hong An, Ye Yeo
Rok vydání:	2010
Předmět:	Physics Quantum discord Bell state Quantum cryptography Quantum state Stochastic process Quantum mechanics Quantum Physics Quantum entanglement Statistical physics Quantum information science Teleportation Atomic and Molecular Physics and Optics
Zdroj:	Physical Review A. 82
ISSN:	1094-1622 1050-2947
DOI:	10.1103/physreva.82.032340
Popis:	We show how, under the influence of non-Markovian environments, two different maximally entangled Bell states give rise to states that have equal classical correlations and the same capacities to violate the Bell-Clauser-Horne-Shimony-Holt inequality, but intriguingly differing usefulness for teleportation and dense coding. We elucidate how different entanglement measures like negativity and concurrence, and two different measures of quantum discord, could account for these behaviors. In particular, we explicitly show how the Ollivier-Zurek measure of discord directly accounts for one state being a better resource for dense coding compared to another. Our study leads to several important issues about these measures of discord.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fc0af915d544a45fb45a8650851ba5a7 https://doi.org/10.1103/physreva.82.032340 Zobrazit plný text záznamu