Collective excitations of a Bose-Einstein condensate in a magnetic trap

被引：568

作者：

Mewes, MO ^{[1
]}

Andrews, MR ^{[1
]}

vanDruten, NJ ^{[1
]}

Kurn, DM ^{[1
]}

Durfee, DS ^{[1
]}

Townsend, CG ^{[1
]}

Ketterle, W ^{[1
]}

机构：

[1] MIT,ELECTR RES LAB,CAMBRIDGE,MA 02139

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.77.988

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Collective excitations of a dilute Bose condensate have been observed. These excitations are analogous to phonons in superfluid helium. Bose condensates were created by evaporatively cooling magnetically trapped sodium atoms. Excitations were induced by a modulation of the trapping potential, and detected as shape oscillations in the freely expanding condensates. The frequencies of the lowest modes agreed well with theoretical predictions based on mean-field theory. Before the onset of Bose-Einstein condensation, we observed sound waves in a dense ultracold gas.

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收藏

页码：988 / 991

页数：4

相关论文

共 15 条

[1] 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

[2] Direct, nondestructive observation of a bose condensate [J].

Andrews, MR ;

Mewes, MO ;

vanDruten, NJ ;

Durfee, DS ;

Kurn, DM ;

Ketterle, W .

SCIENCE, 1996, 273 (5271) :84-87

[3] Ground-state properties of magnetically trapped Bose-condensed rubidium gas [J].

Baym, G ;

Pethick, CJ .

PHYSICAL REVIEW LETTERS, 1996, 76 (01) :6-9

[4]

Bogoliubov N. N., 1947, J. Phys. (USSR), V11, P23

[5] EVIDENCE OF BOSE-EINSTEIN CONDENSATION IN AN ATOMIC GAS WITH ATTRACTIVE INTERACTIONS [J].

BRADLEY, CC ;

SACKETT, CA ;

TOLLETT, JJ ;

HULET, RG .

PHYSICAL REVIEW LETTERS, 1995, 75 (09) :1687-1690

[6] 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

[7] EVAPORATIVE COOLING OF SODIUM ATOMS [J].

DAVIS, KB ;

MEWES, MO ;

JOFFE, MA ;

ANDREWS, MR ;

KETTERLE, W .

PHYSICAL REVIEW LETTERS, 1995, 74 (26) :5202-5205

[8] Ground state and excited states of a confined condensed Bose gas [J].

Fetter, AL .

PHYSICAL REVIEW A, 1996, 53 (06) :4245-4249

[9]

Feynman R. P, 1955, Progress in Low Temperature Physics, DOI [DOI 10.1016/S0079-6417(08)60077-3, 10.1016/S0079-6417(08)60077-3]

[10] ATOMIC-HYDROGEN IN AN INHOMOGENEOUS MAGNETIC-FIELD - DENSITY PROFILE AND BOSE-EINSTEIN CONDENSATION [J].

GOLDMAN, VV ;

SILVERA, IF ;

LEGGETT, AJ .

PHYSICAL REVIEW B, 1981, 24 (05) :2870-2873