Floquet strong Hilbert space fragmentation stabilizes discrete time crystals in a disorder-free kicked XXZ spin chain, with lifetime independent of frequency and exponential in system size.
(b) Phase diagram in the (V /J, ϵ) plane, with dots marking the extracted phase boundariesϵ c for differentV /J
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Discrete time crystals enabled by Floquet strong Hilbert space fragmentation
Floquet strong Hilbert space fragmentation stabilizes discrete time crystals in a disorder-free kicked XXZ spin chain, with lifetime independent of frequency and exponential in system size.