Truncated dynamics, ring molecules, and mechanical time crystals

Jin Dai, Antti J. Niemi, Xubiao Peng, Frank Wilczek

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We identify circumstances where the effective descriptions of microscopic physical systems leads to a self-consistent reduced dynamics for a truncated subset of the original variables. The effective Hamiltonian involves unusual Poisson brackets that bring in noncommutative geometry. In idealized models of ring molecules, we find time crystal behavior is widespread.

Original languageEnglish (US)
Article number023425
JournalPhysical Review A
Issue number2
StatePublished - Feb 25 2019

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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