Excitation of phonons in a Bose-Einstein condensate by light scattering

被引：382

作者：

Stamper-Kurn, DM ^{[1
]}

Chikkatur, AP

Görlitz, A

Inouye, S

Gupta, S

Pritchard, DE

Ketterle, W

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.83.2876

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Stimulated small-angle light scattering was used to measure the structure factor of a Bose-Einstein condensate in the phonon regime. The excitation strength for phonons was found to be significantly reduced from that of free particles, revealing the presence of correlated pair excitations and quantum depletion in the condensate. The Bragg resonance line strength and line shift agreed with predictions for the homogeneous Bose gas using a local density approximation.

引用

页码：2876 / 2879

页数：4

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