Effect of weak magnetic field on quantum spin correlation in an s-wave superconductor
Superconductivity
2010-11-15 v1
Abstract
We study the effect of a weak magnetic field on the state of the spins of a pair of electrons forming a Cooper pair in an s-wave superconductor. By perturbatively solving time-dependent Bogoliubov equations up to first order, we obtain the two-particle Green function, and whence the two-electron spin-space density matrix. It appears that up to first order approximation, the spin state of a Cooper pair retains the form of a Werner state. This state is then examined in the sense of quantum correlations, i.e., quantum discord.
Keywords
Cite
@article{arxiv.1011.3011,
title = {Effect of weak magnetic field on quantum spin correlation in an s-wave superconductor},
author = {R. Afzali and A. T. Rezakhani and H. R. Alborznia},
journal= {arXiv preprint arXiv:1011.3011},
year = {2010}
}
Comments
4 pages, 1 figure