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|Type:||Artigo de periódico|
|Title:||Zener Transitions In Dissipative Driven Systems|
|Abstract:||The effect of inelastic interactions on Zener transitions is studied in the context of externally driven systems (flux-driven normal metallic rings, current-biased tunnel junctions, etc.). We employ a time-dependent Hamiltonian and use a two-level approximation to study these systems. We consider a coupling (not necessarily weak) of the system to a phonon bath and allow for a large class of phonon spectra. The coupling tends to reduce the Zener tunneling. The Zener transitions are enhanced at finite temperatures. We also consider the effect of a phenomenological relaxation time on the behavior of the system, and express the (nonlinear) resistance R in terms of and the other important physical parameters. When the bias goes to zero, R vanishes. © 1987 The American Physical Society.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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