Dynamics of quantum discord of two coupled spin-1/2 subjected to time-dependent magnetic fields
Quantum Physics
2021-01-20 v1
Abstract
We describe the dynamics of quantum discord of two interacting spin-1/2 subjected to controllable time-dependent magnetic fields. The exact time evolution of discord is given for various input mixed states consisting of classical mixtures of two Bell states. The quantum discord manifests a complex oscillatory behaviour in time and is compared with that of quantum entanglement, measured by concurrence. The interplay of the action of the time-dependent magnetic fields and the spin-coupling mechanism in the occurrence and evolution of quantum correlations is examined in detail.
Keywords
Cite
@article{arxiv.2101.07697,
title = {Dynamics of quantum discord of two coupled spin-1/2 subjected to time-dependent magnetic fields},
author = {Roberto Grimaudo and Tatiana Mihaescu and Aurelian Isar and Iulia Ghiu and Antonino Messina},
journal= {arXiv preprint arXiv:2101.07697},
year = {2021}
}
Comments
15 pages, 7 figures