发表机构
University of Cyprus(塞浦路斯大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文给出经典时间晶体的精确解析解,其动能为分段抛物线形式,解具有周期性不连续性,并探讨了四次动能的模拟方法。
AI 中文摘要
我们展示了经典时间晶体(位置处于抛物线势阱中)的例子,这些例子具有简单精确的解析解。这些晶体中的动能作为速度的函数是分段抛物线的,并在速度的非零值处取得最小值。解是周期性的,而速度则具有确定的周期性不连续性。在作用量较低的支路上,解是稳定的。我们还研究了具有四次动能的经典时间晶体。我们展示了如何用分段抛物线动能来模拟四次动能,从而得到准确且透明的解。
英文摘要
We present examples of classical time crystals (in a parabolic potential for the position) that admit simple exact analytic solutions. The kinetic energy in these crystals is piecewise parabolic as a function of speed and is minimised at nonzero values of the speed. The solutions are periodic, while the speed acquires definite periodic discontinuities. The solutions are stable along the branches where the action is lower. We also examine the classical time crystal with quartic kinetic energy. We show how the quartic kinetic energy can be emulated by a piecewise parabolic one, leading to accurate and transparent solutions.
Comments12 pages, 10 figures