Majorana zero modes in the Kitaev chain protect boundary quantum Fisher information from delocalization, maintaining a nonzero plateau for exponentially long times.
Away from the boundary, the fermionic single-site algebra maps to string-dressed spin operators because of the Jordan–Wigner tail
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Topological protection of local quantum Fisher information
Majorana zero modes in the Kitaev chain protect boundary quantum Fisher information from delocalization, maintaining a nonzero plateau for exponentially long times.