Cooling of Sr to high phase-space density by laser and sympathetic cooling in isotopic mixtures

被引：28

作者：

Ferrari, G ^{[1
]}

Drullinger, RE ^{[1
]}

Poli, N ^{[1
]}

Sorrentino, F ^{[1
]}

Tino, GM ^{[1
]}

机构：

[1] Univ Florence, Ist Nazl Fis Mat, Ist Nazl Fis Nucl, Dipartimento Fis & LENS, I-50019 Florence, Italy

来源：

PHYSICAL REVIEW A | 2006年 / 73卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.73.023408

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Based on an experimental study of two-body and three-body collisions in ultracold strontium samples, a novel optical-sympathetic cooling method in isotopic mixtures is demonstrated. Without evaporative cooling, a phase-space density of 6x10(-2) is obtained with a high spatial density that should allow us to overcome the difficulties encountered so far to reach quantum degeneracy for Sr atoms.

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