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<p>One-dimensional scattering of a wave packet of a relativistic fermion under a temporally oscillating electric field superimposed on a potential step is discussed by using the Furry-picture perturbation theory, where the oscillating electric field is treated as a perturbation. Reflection and transmission probabilities of the wave packet, which in its single-mode limit are consistent with those in the stationary scattering off the potential step alone, are investigated up to the second order. We show that even in the absence of the so-called Klein region, a positive-frequency incoming wave can penetrate the negative- frequency region below the potential step by emitting its energy to the oscillating electric field with a finite tunneling probability.</p>

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Dynamically assisted Klein tunneling in the Furry picture

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月21日

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  • Makoto Ochiai,
  • Shunsuke Shibayama

摘要

One-dimensional scattering of a wave packet of a relativistic fermion under a temporally oscillating electric field superimposed on a potential step is discussed by using the Furry-picture perturbation theory, where the oscillating electric field is treated as a perturbation. Reflection and transmission probabilities of the wave packet, which in its single-mode limit are consistent with those in the stationary scattering off the potential step alone, are investigated up to the second order. We show that even in the absence of the so-called Klein region, a positive-frequency incoming wave can penetrate the negative- frequency region below the potential step by emitting its energy to the oscillating electric field with a finite tunneling probability.