Cooling and localization dynamics in optical lattices

被引：77

作者：

Raithel, G

Birkl, G

Kastberg, A

Phillips, WD

Rolston, SL

机构：

[1] National Institute of Standards and Technology, Gaithersburg, MD, 20899

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.78.630

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using Bragg scattering as a sensitive probe, we study how atoms are cooled and localized after the sudden turn-on of 1D and 3D optical lattices. We measure the time evolution of the mean-square position spread of the atoms in the lattice potential wells, a quantity proportional to their effective temperature. The rate of exponential approach to equilibrium is proportional to the photon scattering rate and about 6 times faster in 1D than in 3D. This simple proportionality was unexpected, based on the usual model of Sisyphus cooling, but is in agreement with our 1D Monte Carlo simulations.

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页码：630 / 633

页数：4

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