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Self-similar spectrum in effective time independent Hamiltonians for kicked systems

We study multifractal properties in the spectrum of effective time-independent Hamiltonians obtained using a perturbative method for a class of delta-kicked systems. The evolution operator in the time-dependent problem is factorized into an initial kick, an evolution dictated by a time-independent Hamiltonian, and a final kick. We have used the double kicked $SU(2)$ system and the kicked Harper model to study butterfly spectrum in the corresponding effective Hamiltonians. We have obtained a generic class of $SU(2)$ Hamiltonians showing self-similar spectrum. The statistics of the generalized fractal dimension is studied for a quantitative characterization of the spectra.

preprint2015arXivOpen access
Rashmi Jangid SharmaJayendra N. BandyopadhyayTapomoy Guha Sarkar
nlin.CDquant-ph
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Rashmi Jangid SharmaJayendra N. BandyopadhyayTapomoy Guha Sarkar

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