Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
Quantum Physics
2020-10-09 v1
Abstract
We study and compare the time evolutions of concurrence and quantum discord in a driven system of two interacting qubits prepared in a generic Werner state. The~corresponding quantum dynamics is exactly treated and manifests the appearance and disappearance of entanglement. Our analytical treatment transparently unveils the physical reasons for the occurrence of such a phenomenon, relating it to the dynamical invariance of the structure of the initial state. The~quantum correlations which asymptotically emerge in the system are investigated in detail in terms of the time evolution of the fidelity of the initial Werner state.
Cite
@article{arxiv.2010.03968,
title = {Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems},
author = {Iulia Ghiu and Roberto Grimaudo and Tatiana Mihaescu and Aurelian Isar and Antonino Messina},
journal= {arXiv preprint arXiv:2010.03968},
year = {2020}
}