Optically induced lensing effect on a Bose-Einstein condensate expanding in a moving lattice

被引：67

作者：

Fallani, L

Cataliotti, FS

Catani, J

Fort, C

Modugno, M

Zawada, M

Inguscio, M

机构：

[1] INFM, LENS, I-50019 Sesto Fiorentino, FI, Italy

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

[3] Univ Catania, Dipartimento Fis, I-95124 Catania, Italy

[4] Jagiellonian Univ, Marian Smoluchowski Phys Inst, PL-30059 Krakow, Poland

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 24期

关键词：

PHASE-COHERENT AMPLIFICATION; MATTER WAVES; ATOM OPTICS; OUTPUT COUPLER; SOLITONS; LASER;

D O I：

10.1103/PhysRevLett.91.240405

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the experimental observation of a lensing effect on a Bose-Einstein condensate expanding in a moving 1D optical lattice. The effect of the periodic potential can be described by an effective mass dependent on the condensate quasimomentum. By changing the velocity of the atoms in the frame of the optical lattice, we induce a focusing of the condensate along the lattice direction. The experimental results are compared with the numerical predictions of an effective 1D theoretical model. In addition, a precise band spectroscopy of the system is carried out by looking at the real-space propagation of the atomic wave packet in the optical lattice.

引用

页数：4

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