Collapse and revival of the monopole mode of a degenerate Bose gas in an isotropic harmonic trap

被引：9

作者：

Straatsma, C. J. E. ^{[1
,2
]}

Colussi, V. E. ^{[3
,4
]}

Davis, M. J. ^{[1
,5
]}

Lobser, D. S. ^{[3
,4
]}

Holland, M. J. ^{[3
,4
]}

Anderson, D. Z. ^{[3
,4
]}

Lewandowski, H. J. ^{[3
,4
]}

Cornell, E. A. ^{[3
,4
]}

机构：

[1] Univ Colorado, JILA, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Elect Comp & Energy Engn, Boulder, CO 80309 USA

[3] Univ Colorado, NIST, JILA, Boulder, CO 80309 USA

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

[5] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

来源：

PHYSICAL REVIEW A | 2016年 / 94卷 / 04期

基金：

美国国家科学基金会; 澳大利亚研究理事会;

关键词：

COLLECTIVE EXCITATIONS; EINSTEIN CONDENSATION; FREQUENCY-SHIFTS; DYNAMICS; COLLISIONLESS; SIMULATIONS; EQUATION; CHARGE;

D O I：

10.1103/PhysRevA.94.043640

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the monopole (breathing) mode of a finite temperature Bose-Einstein condensate in an isotropic harmonic trap recently developed by Lobser et al. [Nat. Phys. 11, 1009 (2015)]. We observe a nonexponential collapse of the amplitude of the condensate oscillation followed by a partial revival. This behavior is identified as being due to beating between two eigenmodes of the system, corresponding to in-phase and out-of-phase oscillations of the condensed and noncondensed fractions of the gas. We perform finite temperature simulations of the system dynamics using the Zaremba-Nikuni-Griffin methodology [J. Low Temp. Phys. 116, 277 (1999)], and find good agreement with the data, thus confirming the two mode description.

引用

页数：13

共 65 条

[1]

Allen A. J., 2014, Journal of Physics: Conference Series, V544, DOI 10.1088/1742-6596/544/1/012023

[2] Observable vortex properties in finite-temperature Bose gases [J].

Allen, A. J. ;

Zaremba, E. ;

Barenghi, C. F. ;

Proukakis, N. P. .

PHYSICAL REVIEW A, 2013, 87 (01)

[3] 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

[4]

[Anonymous], PHYS REV A

[5]

BELIAEV ST, 1958, SOV PHYS JETP-USSR, V7, P299

[6] Projected Gross-Pitaevskii equation theory of finite-temperature collective modes for a trapped Bose gas [J].

Bezett, A. ;

Blakie, P. B. .

PHYSICAL REVIEW A, 2009, 79 (02)

[7] Collisionless modes of a trapped Bose gas [J].

Bijlsma, MJ ;

Stoof, HTC .

PHYSICAL REVIEW A, 1999, 60 (05) :3973-3981

[8]

Bird G., 1994, MOL GAS DYNAMICS DIR

[9]

BIRDSALL C. K., 2004, Series in Plasma Physics

[10] Dynamics and statistical mechanics of ultra-cold Bose gases using c-field techniques [J].

Blakie, P. B. ;

Bradley, A. S. ;

Davis, M. J. ;

Ballagh, R. J. ;

Gardiner, C. W. .

ADVANCES IN PHYSICS, 2008, 57 (05) :363-455

← 1 2 3 4 5 6 7 →