Magnetic field dependence of ultracold inelastic collisions near a Feshbach resonance

被引：166

作者：

Roberts, JL ^{[1
]}

Claussen, NR

Cornish, SL

Wieman, CE

机构：

[1] Natl Inst Stand & Technol, JILA, Boulder, CO 80309 USA

[2] Univ Colorado, Boulder, CO 80309 USA

[3] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.85.728

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Inelastic collision rates for ultracold Rb-85 atoms in the F = 2, m(f) = -2 state have been measured as a function of magnetic field. At 250 gauss (G), the two- and three-body loss rates were measured to be K-2 = (1.87 +/- 0.95 +/- 0.19) x 10(-14) cm(3)/s and K-3 = (4.24(-0.29)(+0.70) +/- 0.85) x 10(-25) cm(6)/s, respectively. As the magnetic field is decreased from 250 G towards a Feshbach resonance at 155 G, the inelastic rates decrease to a minimum and then increase dramatically, peaking at the Feshbach resonance. Both two- and three-body losses are important, and individual contributions have been compared with theory.

引用

页码：728 / 731

页数：4

共 20 条

[1] Bose-Einstein condensation of lithium: Observation of limited condensate number [J].

Bradley, CC ;

Sackett, CA ;

Hulet, RG .

PHYSICAL REVIEW LETTERS, 1997, 78 (06) :985-989

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

Burke, JP ;

Bohn, JL ;

Esry, BD ;

Greene, CH .

PHYSICAL REVIEW LETTERS, 1998, 80 (10) :2097-2100

[3] Observation of a Feshbach resonance in cold atom scattering [J].

Courteille, P ;

Freeland, RS ;

Heinzen, DJ ;

van Abeelen, FA ;

Verhaar, BJ .

PHYSICAL REVIEW LETTERS, 1998, 81 (01) :69-72

[4] Recombination of three atoms in the ultracold limit [J].

Esry, BD ;

Greene, CH ;

Burke, JP .

PHYSICAL REVIEW LETTERS, 1999, 83 (09) :1751-1754

[5] Three-body recombination of ultracold atoms to a weakly bound s level [J].

Fedichev, PO ;

Reynolds, MW ;

Shlyapnikov, GV .

PHYSICAL REVIEW LETTERS, 1996, 77 (14) :2921-2924

[6] Observation of Feshbach resonances in a Bose-Einstein condensate [J].

Inouye, S ;

Andrews, MR ;

Stenger, J ;

Miesner, HJ ;

Stamper-Kurn, DM ;

Ketterle, W .

NATURE, 1998, 392 (6672) :151-154

[7] Estimating bounds on collisional relaxation rates of spin-polarized Rb-87 atoms at ultracold temperatures [J].

Mies, FH ;

Williams, CJ ;

Julienne, PS ;

Krauss, M .

JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, 1996, 101 (04) :521-535

[8] Decay of trapped ultracold alkali atoms by recombination [J].

Moerdijk, AJ ;

Boesten, HMJM ;

Verhaar, BJ .

PHYSICAL REVIEW A, 1996, 53 (02) :916-920

[9] Multiply loaded magneto-optical trap [J].

Myatt, CJ ;

Newbury, NR ;

Ghrist, RW ;

Loutzenhiser, S ;

Wiemann, CE .

OPTICS LETTERS, 1996, 21 (04) :290-292

[10] Low-energy recombination of identical bosons by three-body collisions [J].

Nielsen, E ;

Macek, JH .

PHYSICAL REVIEW LETTERS, 1999, 83 (08) :1566-1569

← 1 2 →