变分扰动理论的最高导数版本
凝聚态物理
2016-11-23 v1
摘要
我们系统地研究了不同的变分扰动理论版本,通过迫使对变分参数的导数(不仅是一阶或二阶,也包括更高阶导数)为零。选择最高导数版本在逼近 anharmonic 振荡器基态能量方面最为成功。因此它被用于确定超流 4He 中比热临界指数 alpha,结果与最近空间飞船实验测得的值一致。
引用
@article{arxiv.cond-mat/0105509,
title = {The Highest-Derivative Version of Variational Perturbation Theory},
author = {Bodo Hamprecht and Axel Pelster},
journal= {arXiv preprint arXiv:cond-mat/0105509},
year = {2016}
}
备注
The article is a contribution to the book "Fluctuating Paths and Fields - Dedicated to Hagen Kleinert on the Occasion of His 60th Birthday", Eds. Wolfhard Janke, Axel Pelster, Hans-Juergen Schmidt, and Michael Bachmann (World Scientific, Singapore, 2001), p. 347-364