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Achieving translational symmetry in trapped cold ion rings

zqyin 添加于 2016-5-10 09:12 | 1531 次阅读 | 0 个评论

作者
Li H-K, Urban E, Noel C, Chuang A, Xia Y, Ransford A, Hemmerling B, Wang Y, Li T, Haeffner H, Zhang X
摘要
Spontaneous symmetry breaking is a universal concept throughout science. For instance, the Landau-Ginzburg paradigm of translational symmetry breaking underlies the classification of nearly all quantum phases of matter and explains the emergence of crystals, insulators, and superconductors. Usually, the consequences of translational invariance are studied in large systems to suppress edge effects which cause undesired symmetry breaking. While this approach works for investigating global properties, studies of local observables and their correlations require access and control of the individual constituents. Periodic boundary conditions, on the other hand, could allow for translational symmetry in small systems where single particle control is achievable. Here, we crystallize up to fifteen 40Ca+ ions in a microscopic ring with inherent periodic boundary conditions. We show the ring\'s translational symmetry is preserved at millikelvin temperatures by delocalizing the Doppler laser cooled ions. This establishes an upper bound for undesired symmetry breaking at a level where quantum control becomes feasible. These findings pave the way towards studying quantum many-body physics with translational symmetry at the single particle level in a variety of disciplines from simulation of Hawking radiation to exploration of quantum phase transitions.
详细资料
- 关键词: quant-ph; cond-mat.mes-hall; physics.atom-ph
- 文献种类: Manual Script
- 期卷页: 2016年
- 日期: 2016-5-7
- 发布方式: arXiv e-prints
- 备注:arXiv:1605.02143v1; 15 pages, 4 figures
学科领域自然科学 » 物理学
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