Document Details Document Type : Article In Journal  Document Title : Persistence of quantum correlations in a XY spin-chain environment Persistence of quantum correlations in a XY spin-chain environment   Subject : physics  Document Language : English  Abstract : Quantum correlations in a physical system are usually degraded whenever there is an interaction with the environment. Here we consider the action of a XY spin-chain interacting with a system of two qubits. Results are surprising for particular families of states since their evolution does not destroy the presence of either entanglement or nonlocality, that is, those correlations persist for any possible configuration of the environment. In addition, we unveil the form of those states which, although being mixed, their entanglement implies nonlocality and vice versa. This finding constitutes an extension of the well-known Gisin Theorem for pure states of two qubits. The ensuing form will enable us to find the evolved entanglement and nonlocality in an analytical fashion.  ISSN : 1434-6028  Journal Name : EUROPEAN PHYSICAL JOURNAL B  Volume : 89  Issue Number : 11  Publishing Year : 1437 AH 2016 AD  Article Type : Article  Added Date : Tuesday, August 8, 2017  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email Josep Batle Batle, Josep Investigator Doctorate jbv276@uib.es Mymona Abutalib Abutalib, Mymona Researcher Doctorate   Soliman Abdalla, Abdalla,, Soliman Researcher Doctorate   Ahmed Farooq Farooq, Ahmed Researcher Doctorate   Files File Name Type Description  42515.pdf pdf   Back To Researches Page