Emergence of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>X</mml:mi></mml:math> states in a quantum impurity model

In the present work, we demonstrate the emergence of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi>X</a:mi></a:math> states in the long-time response of a locally perturbed many-body quantum impurity model. The emergence of the double-qubit state is heralded by the lack of decay of the response function as well as the out-of-time order correlator, signifying the trapping of excitations and hence information in edge modes. Surprisingly, after carrying out a quantum information theory characterization, we show that such states exhibit genuine quantum correlations.