Spatial separation in a thermal mixture of ultracold 174Yb and 87Rb atoms

被引：37

作者：

Baumer, F. ^{[1
]}

Muenchow, F. ^{[1
]}

Goerlitz, A. ^{[1
]}

Maxwell, S. E. ^{[2
,3
]}

Julienne, P. S. ^{[2
,3
]}

Tiesinga, E. ^{[2
,3
]}

机构：

[1] Univ Dusseldorf, Inst Expt Phys, DE-40225 Dusseldorf, Germany

[2] Joint Quantum Inst, Gaithersburg, MD 20899 USA

[3] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW A | 2011年 / 83卷 / 04期

关键词：

FESHBACH RESONANCES; RECOMBINATION; COLLISIONS;

D O I：

10.1103/PhysRevA.83.040702

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the observation of unusually strong interactions in a thermal mixture of ultracold atoms which cause a significant modification of the spatial distribution. A mixture of Rb-87 and Yb-174 with a temperature of a few mu K is prepared in a hybrid trap consisting of a bichromatic optical potential superimposed on a magnetic trap. For suitable trap parameters and temperatures, a spatial separation of the two species is observed. We infer that the separation is driven by a large interaction strength between Yb-174 and Rb-87 accompanied by a large three-body recombination rate. Based on this assumption we have developed a diffusion model which reproduces our observations.

引用

页数：4

共 24 条

[1] ALECIAN G, 2006, ELEMENT STRATIFICATI
[2] Observation of a zero-energy resonance in Cs-Cs collisions
Arndt, M
BenDahan, M
GueryOdelin, D
Reynolds, MW
Dalibard, J
[J]. PHYSICAL REVIEW LETTERS, 1997, 79 (04) : 625 - 628
[3] Blatt J.M., 1952, Theoretical Nuclear Physics
[4] Fermi pseudopotential approximation: Two particles under external confinement
Blume, D
Greene, CH
[J]. PHYSICAL REVIEW A, 2002, 65 (04): : 436131 - 436136
[5] Entropy Exchange in a Mixture of Ultracold Atoms
Catani, J.
Barontini, G.
Lamporesi, G.
Rabatti, F.
Thalhammer, G.
Minardi, F.
Stringari, S.
Inguscio, M.
[J]. PHYSICAL REVIEW LETTERS, 2009, 103 (14)
[6] Feshbach resonances in ultracold gases
Chin, Cheng
Grimm, Rudolf
Julienne, Paul
Tiesinga, Eite
[J]. REVIEWS OF MODERN PHYSICS, 2010, 82 (02) : 1225 - 1286
[7] Recombination of three atoms in the ultracold limit
Esry, BD
Greene, CH
Burke, JP
[J]. PHYSICAL REVIEW LETTERS, 1999, 83 (09) : 1751 - 1754
[8] Three-body recombination of ultracold atoms to a weakly bound s level
Fedichev, PO
Reynolds, MW
Shlyapnikov, GV
[J]. PHYSICAL REVIEW LETTERS, 1996, 77 (14) : 2921 - 2924
[9] Quantum-defect theory of atomic collisions and molecular vibration spectra
Gao, B
[J]. PHYSICAL REVIEW A, 1998, 58 (05): : 4222 - 4225
[10] QUANTUM-MECHANICAL MANY-BODY PROBLEM WITH HARD-SPHERE INTERACTION
HUANG, K
YANG, CN
[J]. PHYSICAL REVIEW, 1957, 105 (03): : 767 - 775

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