Observation of dynamical instability for a Bose-Einstein condensate in a moving 1D optical lattice

被引：280

作者：

Fallani, L

De Sarlo, L

Lye, JE

Modugno, M

Saers, R

Fort, C

Inguscio, M

机构：

[1] Univ Florence, LENS, Dipartimento Fis, I-50019 Sesto Fiorentino, FI, Italy

[2] Univ Florence, INFM, I-50019 Sesto Fiorentino, FI, Italy

[3] Univ Trent, BEC INFM Ctr, I-38050 Povo, TN, Italy

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.93.140406

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have experimentally studied the unstable dynamics of a harmonically trapped Bose-Einstein condensate loaded into a 1D moving optical lattice. The lifetime of the condensate in such a potential exhibits a dramatic dependence on the quasimomentum state. This is unambiguously attributed to the onset of dynamical instability, after a comparison with the predictions of the Gross-Pitaevskii theory. Deeply in the unstable region we observe the rapid appearance of complex structures in the atomic density profile, as a consequence of the condensate phase uniformity breakdown.

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页码：140406 / 1

页数：4

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