Bose-Einstein condensation of magnons in superfluid 3He

被引：62

作者：

Bunkov, Yuriy M. ^{[1
]}

Volovik, Grigory E. ^{[2
,3
]}

机构：

[1] CNRS, UJF, Inst Neel, MCBT, F-38042 Grenoble, France

[2] Aalto Univ, Low Temp Lab, FIN-02150 Espoo, Finland

[3] LD Landau Theoret Phys Inst, Moscow, Russia

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2008年 / 150卷 / 3-4期

关键词：

Bose-Einstein condensation; magnons; superfluid He-3;

D O I：

10.1007/s10909-007-9530-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The possibility of Bose-Einstein condensation of excitations has been discussed for a long time. The phenomenon of the phase-coherent precession of magnetization in superfluid He-3 and the related effects of spin superfluidity are based on the true Bose-Einstein condensation of magnons. Several different states of coherent precession has been observed in He-3-B: homogeneously precessing domain (HPD); persistent signal formed by Q-balls at very low temperatures; coherent precession with fractional magnetization; and a mode of the coherent precession in compressed aerogel. The coherent precession has been also found in He-3-A in compressed aerogel. Here we demonstrate that all these cases are examples of a Bose-Einstein condensation of magnons, with the magnon interaction term in the Gross-Pitaevskii equation being provided by different types of spin-orbit coupling in the background of the coherent precession.

引用

页码：135 / 144

页数：10

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