Abstract
We investigate quantum properties of one anisotropic spin driven by an external time-dependent magnetic field which shows a transition from regular to irregular dynamics with increasing field strength in the classical limit. In particular we study the statistical properties of the quasi-spectrum. Our results support the conjecture that Poisson- and GOE-statistics are to be associated with integrable and nonintegrable systems resp. in the semiclassical limit. Approaching the quantum case we observe significant deviations from GOE statistics.
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Frahm, H., Mikeska, H.J. Levelstatistics and stochasticity in a driven quantum system. Z. Physik B - Condensed Matter 65, 249–253 (1986). https://doi.org/10.1007/BF01303848
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DOI: https://doi.org/10.1007/BF01303848