Time translation symmetry

Time translation symmetry means that the laws of physics are the same no matter where one is in time.[1]

Time crystals, a state of matter first observed (seen by humans) in 2017, do break the symmetry.[2]

References

  1. ↑ Wilczek, Frank (2015-07-16). A Beautiful Question: Finding Nature's Deep Design. Penguin Books Limited. ISBN 978-1-84614-702-9.
  2. ↑ Gibney, Elizabeth (2017). "The quest to crystallize time". Nature. 543 (7644): 164–166. Bibcode:2017Natur.543..164G. doi:10.1038/543164a. ISSN 0028-0836. PMID 28277535. S2CID 4460265.