Transition times in the Landau-Zener model

Abstract

This paper presents analytic formulas for various transition times in the Landau-Zener model. Considerable differences are found between the transition times in the diabatic and adiabatic bases, and between the jump time (the time for which the transition probability rises to the region of its asymptotic value) and the relaxation time (the characteristic damping time of the oscillations which appear in the transition probability after the crossing). These transition times have been calculated by using the exact values of the transition probabilities and their derivatives at the crossing point and approximations to the time evolutions of the transition probabilities in the diabatic basis, derived earlier \protect{[}N. V. Vitanov and B. M. Garraway, Phys. Rev. A {\bf 53}, 4288 (1996)\protect{]}, and similar results in the adiabatic basis, derived in the present paper.

7 pages, two-column revtex style, 5 figures, to appear in Phys. Rev. A (Feb 1999)

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