Chaos and statistical relaxation in quantum systems of interacting particles

Details Chaos and statistical relaxation in quantum systems of interacting particles Chaos and statistical relaxation in quantum systems of interacting particles

2011-10-20

arxiv.org/abs/1110.4663v1

Physics

Quantum Physics

5 pages, 5 figures

Scientific paper

We propose a method to study the transition to chaos in isolated quantum systems of interacting particles. It is based on the concept of delocalization of eigenstates in the energy shell, controlled by the Gaussian form of the strength function. We show that although the fluctuations of energy levels in integrable and non-integrable systems are principally different, global properties of the eigenstates may be quite similar, provided the interaction between particles exceeds some critical value. In this case the quench dynamics can be described analytically, demonstrating the universal statistical relaxation of the systems irrespectively of whether they are integrable or not.

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