Collisional properties of ultracold K-Rb mixtures

被引：137

作者：

Ferrari, G ^{[1
]}

Inguscio, M

Jastrzebski, W

Modugno, G

Roati, G

Simoni, A

机构：

[1] Univ Florence, European Lab Nonlinear Spect, I-50019 Sesto Fiorentino, Italy

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

[3] INFM, I-50019 Sesto Fiorentino, Italy

[4] INFM, I-06123 Perugia, Italy

[5] Univ Perugia, Dipartimento Chim, I-06123 Perugia, Italy

[6] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

[7] Univ Trent, Dipartimento Fis, I-38050 Povo, Italy

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.89.053202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We determine the interspecies s-wave triplet scattering length a(3) for all K-Rb isotopic mixtures by measuring the elastic cross section for collisions between K-41 and Rb-87 in different temperature regimes. The positive value a(3)=+163(-12)(+57)a(0) ensures the stability against collapse of binary K-41- Rb-87 Bose-Einstein condensates. For the fermion-boson mixture K-40- Rb-87, we obtain a large and negative scattering length which implies an efficient sympathetic cooling of the fermionic species down to the degenerate regime.

引用

页码：053202/1 / 053202/4

页数：4

共 25 条

[1] Prospects for mixed-isotope Bose-Einstein condensates in rubidium [J].