Transition from Poissonian to GOE level statistics in a modified Artin's billiard

Details Transition from Poissonian to GOE level statistics in a modified Artin's billiard Transition from Poissonian to GOE level statistics in a modified Artin's billiard

1993-07-26

arxiv.org/abs/chao-dyn/9307013v2

Phys. Rev. E 48, 325 (1994)

Physics

Condensed Matter

Scientific paper

10.1103/PhysRevE.49.325

One wall of Artin's billiard on the Poincar\'e half plane is replaced by a one-parameter ($c_p$) family of nongeodetic walls. A brief description of the classical phase space of this system is given. In the quantum domain, the continuousand gradual transition from the Poisson like to GOE level statistics due to the small perturbations breaking the symmetry responsible for the 'arithmetic chaos' at $c_p=1$ is studied. Another GOE $\rightrrow$ Poisson transition due to the mixed phase space for large perturbations is also investigated. A satisfactory description of the intermediate level statistics by the Brody distribution was found in boh cases. The study supports the existence of a scaling region around $c_p=1$. A finite size scaling relation for the Brody-parameter as a function of $1-c_p$ and the number of levels considered can be established.

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