Long-time-scale dynamics of spin textures in a degenerate F=1 87Rb spinor Bose gas

被引：81

作者：

Guzman, J. ^{[1
]}

Jo, G. -B. ^{[1
]}

Wenz, A. N. ^{[1
,2
]}

Murch, K. W. ^{[1
]}

Thomas, C. K. ^{[1
]}

Stamper-Kurn, D. M. ^{[1
,3
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW A | 2011年 / 84卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.84.063625

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the long-term dynamics of spin textures prepared by cooling unmagnetized spinor gases of F = 1 Rb-87 to quantum degeneracy, observing domain coarsening and a strong dependence of the equilibration dynamics on the quadratic Zeeman shift q. For small values of |q|, the textures arrive at a configuration independent of the initial spin-state composition, characterized by large length-scale spin domains and the establishment of easy-axis (negative q) or easy-plane (positive q) magnetic anisotropy. For larger |q|, equilibration is delayed as the spin-state composition of the degenerate spinor gas remains close to its initial value. These observations support the mean-field equilibrium phase diagram predicted for a ferromagnetic spinor Bose-Einstein condensate and also illustrate that equilibration is achieved under a narrow range of experimental settings, making the F = 1 Rb-87 gas more suitable for studies of nonequilibrium quantum dynamics.

引用

页数：6

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