Quantum Kibble-Zurek Mechanism in a Spin-1 Bose-Einstein Condensate

被引：131
|
作者：
Anquez, M. [1 ]
Robbins, B. A. [1 ]
Bharath, H. M. [1 ]
Boguslawski, M. [1 ]
Hoang, T. M. [1 ]
Chapman, M. S. [1 ]
机构：
[1] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA
来源：
PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 15期
基金：
美国国家科学基金会;
关键词：
SPONTANEOUS SYMMETRY-BREAKING; PHASE-TRANSITION; DEFECT FORMATION; STRING FORMATION; COSMOLOGICAL EXPERIMENTS; TOPOLOGICAL DEFECTS; VORTEX FORMATION; SUPERFLUID HE-3; LIQUID-CRYSTALS; COSMIC STRINGS;
D O I：
10.1103/PhysRevLett.116.155301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The dynamics of a quantum phase transition are explored using slow quenches from the polar to the broken-axisymmetry phases in a small spin-1 ferromagnetic Bose-Einstein condensate. Measurements of the evolution of the spin populations reveal a power-law scaling of the temporal onset of excitations versus quench speed as predicted from quantum extensions of the Kibble-Zurek mechanism. The satisfactory agreement of the measured scaling exponent with the analytical theory and numerical simulations provides experimental confirmation of the quantum Kibble-Zurek model.
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页数：6
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