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Exact analytic solutions of classical time crystals

  • Stavros Theodorakis
  • Athina Hadjizorzi
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Abstract

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.

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Cite

BibTeXRIS
BibTeX
@misc{theodorakis2026exact,
  title = {{Exact analytic solutions of classical time crystals}},
  author = {Stavros Theodorakis and Athina Hadjizorzi},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.39201},
  eprint = {2609.39201},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.39201},
}
RIS
TY  - UNPB
TI  - Exact analytic solutions of classical time crystals
AU  - Stavros Theodorakis
AU  - Athina Hadjizorzi
PY  - 2026
DA  - 2026/09/30
PB  - arXiv
DO  - 10.48550/arxiv.2609.39201
UR  - https://arxiv.org/abs/2609.39201
AB  - 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.
ER  -