Classical Time Crystals

被引：261

作者：

Shapere, Alfred ^{[1
]}

Wilczek, Frank ^{[2
]}

机构：

[1] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40502 USA

[2] MIT, Ctr Theoret Phys, Dept Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 15期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.109.160402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider the possibility that classical dynamical systems display motion in their lowest-energy state, forming a time analogue of crystalline spatial order. Challenges facing that idea are identified and overcome. We display arbitrary orbits of an angular variable as lowest-energy trajectories for nonsingular Lagrangian systems. Dynamics within orbits of broken symmetry provide a natural arena for formation of time crystals. We exhibit models of that kind, including a model with traveling density waves.

引用

页数：4

共 9 条

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