Reproduction and an analytic proof show the time-crystal eigenfunctions in Ref. [1] diverge and cannot have the odd/even parity shown in the original figures.
Bialynicki-Birula and Z
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Comment on "Time crystals made of electron-positron pairs"
Reproduction and an analytic proof show the time-crystal eigenfunctions in Ref. [1] diverge and cannot have the odd/even parity shown in the original figures.