Spin Echo Decay in a Stochastic Field Environment
凝聚态物理
2009-10-31 v1
摘要
We derive a general formalism with which it is possible to obtain the time dependence of the echo size for a spin in a stochastic field environment. Our model is based on ``strong collisions''. We examine in detail three cases where: (I) the local field is Ising-like, (II) the field distribution is continuous and has a finite second moment, and (III) the distribution is Lorentzian. The first two cases show a T2 minimum effect and are exponential in time cubed for short times. The last case can be approximated by a phenomenological stretched exponential.
引用
@article{arxiv.cond-mat/9903362,
title = {Spin Echo Decay in a Stochastic Field Environment},
author = {Amit Keren and Ophir M. Auslaender},
journal= {arXiv preprint arXiv:cond-mat/9903362},
year = {2009}
}
备注
11 pages + 3 postscript figures