Dynamical delocalization of Majorana edge states by sweeping across a quantum critical point

Details Dynamical delocalization of Majorana edge states by sweeping across a quantum critical point Dynamical delocalization of Majorana edge states by sweeping across a quantum critical point

2009-07-17

arxiv.org/abs/0907.3134v3

New J. Phys.12:055014, 2010

Physics

Condensed Matter

Strongly Correlated Electrons

Submitted to the Special Issue on "Dynamics and Thermalization in Isolated Quantum Many-Body Systems" in New Journal of Physic

Scientific paper

We study the adiabatic dynamics of Majorana fermions across a quantum phase transition. We show that the Kibble-Zurek scaling, which describes the density of bulk defects produced during the critical point crossing, is not valid for edge Majorana fermions. Therefore, the dynamics governing an edge state quench is nonuniversal and depends on the topological features of the system. Besides, we show that the localization of Majorana fermions is a necessary ingredient to guaranty robustness against defect production.

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