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K. Roberts, K. Roberts, R. Moots (2002)
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We consider the level-crossing problem in a three-level system with nonlinearly time-varying Hamiltonian (time-dependence t - 3 ). We study the validity of the so-called independent crossing approximation in the Landau-Zener model by making comparison with results obtained numerically in the density matrix approach. We also demonstrate the failure of the so-called “nearest zero” approximation of the Landau-Zener level-crossing probability integral.
Physical Review D – American Physical Society (APS)
Published: Feb 1, 2007
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