Semiclassical Approach to Parametric Spectral Correlation with Spin 1/2
arXiv:0707.2276 · doi:10.1088/1751-8113/40/40/004
Abstract
The spectral correlation of a chaotic system with spin 1/2 is universally described by the GSE (Gaussian Symplectic Ensemble) of random matrices in the semiclassical limit. In semiclassical theory, the spectral form factor is expressed in terms of the periodic orbits and the spin state is simulated by the uniform distribution on a sphere. In this paper, instead of the uniform distribution, we introduce Brownian motion on a sphere to yield the parametric motion of the energy levels. As a result, the small time expansion of the form factor is obtained and found to be in agreement with the prediction of parametric random matrices in the transition within the GSE universality class. Moreover, by starting the Brownian motion from a point distribution on the sphere, we gradually increase the effect of the spin and calculate the form factor describing the transition from the GOE (Gaussian Orthogonal Ensemble) class to the GSE class.
25 pages, 2 figures
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Cited by in corpus (4)
- Semiclassical Theory for Universality in Quantum Chaos with Symmetry Crossover
- Universality crossover between chiral random matrix ensembles and twisted SU(2) lattice Dirac spectra
- Chaotic Transport in the Symmetry Crossover Regime with a Spin-orbit Interaction
- Beyond the Heisenberg time: Semiclassical treatment of spectral correlations in chaotic systems with spin 1/2