Propagation of sound in a Bose-Einstein condensate

被引：384

作者：

Andrews, MR ^{[1
]}

Kurn, DM ^{[1
]}

Miesner, HJ ^{[1
]}

Durfee, DS ^{[1
]}

Townsend, CG ^{[1
]}

Inouye, S ^{[1
]}

Ketterle, W ^{[1
]}

机构：

[1] MIT,ELECT RES LAB,CAMBRIDGE,MA 02139

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.79.553

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Sound propagation has been studied in a magnetically trapped dilute Bose-Einstein condensate. Localized excitations were induced by suddenly modifying the trapping potential using the optical dipole force of a focused laser beam. The resulting propagation of sound was observed-using a. novel technique, rapid sequencing of nondestructive phase-contrast images. The speed of sound was determined as a function of density and found to be consistent with Bogoliubov theory. This method may generally be used to observe high-lying modes and perhaps second sound.

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页码：553 / 556

页数：4

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