Quantum Dynamical Echoes in the Spin 'Diffusion' in Mesoscopic Systems
Condensed Matter
2009-10-28 v1
Abstract
The evolution of local spin polarization in finite systems involves interference phenomena that give rise to {\bf quantum dynamical echoes }and non-ergodic behavior. We predict the conditions to observe these echoes by exploiting the NMR sequences devised by Zhang et al. [Phys. Rev. Lett. {\bf % 69}, 2149 (1992)], which uses a rare C as {\bf local probe }for a dipolar coupled H spin system. The non-ideality of this probe when testing mesoscopic systems is carefully analyzed revealing the origin of various striking experimental features.
Cite
@article{arxiv.cond-mat/9604019,
title = {Quantum Dynamical Echoes in the Spin 'Diffusion' in Mesoscopic Systems},
author = {Horacio M. Pastawski and Patricia R. Levstein and Gonzalo Usaj},
journal= {arXiv preprint arXiv:cond-mat/9604019},
year = {2009}
}
Comments
4 pages, Revtex, 3 Figures available upon request