%0 Journal Article
%T Quantum criticality and dynamical instability in the kicked top
%A V. M. Bastidas
%A P. Perez-Fernandez
%A M. Vogl
%A T. Brandes
%J Physics
%D 2013
%I arXiv
%R 10.1103/PhysRevLett.112.140408
%X We investigate precursors of critical behavior in the quasienergy spectrum due to the dynamical instability in the kicked top. Using a semiclassical approach, we analytically obtain a logarithmic divergence in the density of states, which is analogous to a continuous excited state quantum phase transition in undriven systems. We propose a protocol to observe the cusp behavior of the magnetization close to the critical quasienergy.
%U http://arxiv.org/abs/1308.5640v2