Beliaev damping of quasiparticles in a Bose-Einstein condensate

被引：71

作者：

Katz, N ^{[1
]}

Steinhauer, J ^{[1
]}

Ozeri, R ^{[1
]}

Davidson, N ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Phys Complex Syst, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.89.220401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a measurement of the suppression of collisions of quasiparticles with ground state atoms within a Bose-Einstein condensate at low momentum. These collisions correspond to Beliaev damping of the excitations, in the previously unexplored regime of the continuous quasiparticle energy spectrum. We use a hydrodynamic simulation of the expansion dynamics, with the Beliaev damping cross section, in order to confirm the assumptions of our analysis.

引用

页数：4

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