Perturbative Approach to Landau-Zener Tr
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D. Waxman
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Article
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1994
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Elsevier Science
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English
β 379 KB
The Landau-Zener level-crossing problem is analysed perturbatively. We consider the operator \(H(t)=\Phi(t) \sigma^{3}+\Delta \sigma^{1}\), where \(\Phi(t)\) is an external (time-dependent) force, \(\sigma^{i}\) are the Pauli matrices, and \(\Delta\) is taken to be a small parameter. By considering