A delta-kick on the edge impurity of a transverse-field Ising chain leaves the two localized edge modes in an X-state with finite concurrence and discord, heralded by non-decaying response and out-of-time-order correlator oscillations.
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Emergence of $X$ states in a quantum impurity model
A delta-kick on the edge impurity of a transverse-field Ising chain leaves the two localized edge modes in an X-state with finite concurrence and discord, heralded by non-decaying response and out-of-time-order correlator oscillations.