Direct observation of the phonon energy in a Bose-Einstein condensate by tomographic imaging

被引：41

作者：

Ozeri, R ^{[1
]}

Steinhauer, J ^{[1
]}

Katz, N ^{[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 / 88卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.88.220401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The momentum and energy of phonons in a Bose-Einstein condensate are measured directly from a time-of-flight image by computerized tomography. We find that the same atoms that carry the momentum of the excitation also carry the excitation energy. The measured energy is in agreement with the Bogoliubov spectrum. Hydrodynamic simulations are performed which confirm our observation.

引用

页数：4

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