39K Bose-Einstein condensate with tunable interactions

被引:178
作者
Roati, G. [1 ]
Zaccanti, M.
D'Errico, C.
Catani, J.
Modugno, M.
Simoni, A.
Inguscio, M.
Modugno, G.
机构
[1] Univ Florence, Ist Nazl Fis Nucl, LENS, I-50019 Sesto Fiorentino, Italy
[2] Univ Florence, Ist Nazl Fis Nucl, Dipartimento Fis, I-50019 Sesto Fiorentino, Italy
[3] CNR, INFM, I-50019 Sesto Fiorentino, Italy
[4] Univ Trent, BEC INFM Ctr, I-38050 Povo, Italy
[5] Univ Florence, Ist Nazl Fis Nucl, Dipartimento Matemat Applicata, I-50019 Sesto Fiorentino, Italy
[6] CNRS, Unite Mixte Rech 6627, Lab Phys Atomes Lasers Mol & Surfaces, F-35042 Rennes, France
[7] Univ Rennes, F-35042 Rennes, France
关键词
D O I
10.1103/PhysRevLett.99.010403
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We produce a Bose-Einstein condensate of K-39 atoms. Condensation of this species with a naturally small and negative scattering length is achieved by a combination of sympathetic cooling with Rb-87 and direct evaporation, exploiting the magnetic tuning of both inter- and intraspecies interactions at Feshbach resonances. We explore the tunability of the self-interactions by studying the expansion and the stability of the condensate. We find that a K-39 condensate is interesting for future experiments requiring a weakly-interacting Bose gas.
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页数:4
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共 35 条
[1]   Macroscopic quantum interference from atomic tunnel arrays [J].
Anderson, BP ;
Kasevich, MA .
SCIENCE, 1998, 282 (5394) :1686-1689
[2]   OBSERVATION OF BOSE-EINSTEIN CONDENSATION IN A DILUTE ATOMIC VAPOR [J].
ANDERSON, MH ;
ENSHER, JR ;
MATTHEWS, MR ;
WIEMAN, CE ;
CORNELL, EA .
SCIENCE, 1995, 269 (5221) :198-201
[3]   ABSENCE OF DIFFUSION IN CERTAIN RANDOM LATTICES [J].
ANDERSON, PW .
PHYSICAL REVIEW, 1958, 109 (05) :1492-1505
[4]   Heisenberg-limited spectroscopy with degenerate Bose-Einstein gases [J].
Bouyer, P ;
Kasevich, MA .
PHYSICAL REVIEW A, 1997, 56 (02) :R1083-R1086
[5]   Quantum encounters of the cold kind [J].
Burnett, K ;
Julienne, PS ;
Lett, PD ;
Tiesinga, E ;
Williams, CJ .
NATURE, 2002, 416 (6877) :225-232
[6]   Sensitive measurement of forces at the micron scale using bloch oscillations of ultracold atoms [J].
Carusotto, I ;
Pitaevskii, L ;
Stringari, S ;
Modugno, G ;
Inguscio, M .
PHYSICAL REVIEW LETTERS, 2005, 95 (09)
[7]   High resolution Feshbach spectroscopy of cesium [J].
Chin, C ;
Vuletic, V ;
Kerman, AJ ;
Chu, S .
PHYSICAL REVIEW LETTERS, 2000, 85 (13) :2717-2720
[8]   Theory of Bose-Einstein condensation in trapped gases [J].
Dalfovo, F ;
Giorgini, S ;
Pitaevskii, LP ;
Stringari, S .
REVIEWS OF MODERN PHYSICS, 1999, 71 (03) :463-512
[9]   BOSE-EINSTEIN CONDENSATION IN A GAS OF SODIUM ATOMS [J].
DAVIS, KB ;
MEWES, MO ;
ANDREWS, MR ;
VANDRUTEN, NJ ;
DURFEE, DS ;
KURN, DM ;
KETTERLE, W .
PHYSICAL REVIEW LETTERS, 1995, 75 (22) :3969-3973
[10]   Collisional properties of sympathetically cooled 39K [J].
De Sarlo, L. ;
Maioli, P. ;
Barontini, G. ;
Catani, J. ;
Minardi, F. ;
Inguscio, M. .
PHYSICAL REVIEW A, 2007, 75 (02)