Second Sound in a聽Strongly Anisotropic System of聽Quasiparticles in He(II)

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• 作者：I. N. Adamenko ; K. E. Nemchenko ; V. A. Slipko and A. F. G. Wyatt
• 关键词：PACS 62.60.+v
• 刊名：Journal of Low Temperature Physics
• 出版时间：September, 2007
• 出版年：2007
• 期刊代码：20_00222291
• 类别：law
• 卷：148
• 期：5-6
• 页码：547-552
• 数据来源：sp

摘要

In this paper we consider the problem of second sound propagation in a quasiparticle system which has a high level of anisotropy. The main aim of the research is to derive an exact expression for the second sound velocity in such a system, which is valid for any value of the velocity of the quasiparticle system relative to the superfluid. We can then consider the propagation of thermal perturbations in anisotropic systems of both phonons and rotons in He(II). We compare the results with previous