Effective Lagrangian and topological interactions in supersolids

被引：73

作者：

Son, DT ^{[1
]}

机构：

[1] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.94.175301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We construct a low-energy effective Lagrangian describing zero temperature supersolids. Galilean invariance imposes strict constraints on the form of the effective Lagrangian. We identify a topological term in the Lagrangian that couples superfluid and crystalline modes. For small superfluid fractions, this interaction term is dominant in problems involving defects. As an illustration, we compute the differential cross section of scatterings of low-energy transverse elastic phonons by a superfluid vortex. The result is model independent.

引用

页数：4