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Multibarrier tunneling.

S Esposito1

  • 1Dipartimento di Scienze Fisiche, Università di Napoli Federico II, Via Cinthia, I-80126 Napoli, Italy. Salvatore.Esposito@na.infn.it

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|March 15, 2003
PubMed
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Tunneling time through multiple barriers is independent of barrier thickness or separation. This quantum tunneling phenomenon, observable in photonic experiments, reveals nonlocality in multibarrier systems.

Area of Science:

  • Quantum mechanics
  • Solid-state physics
  • Photonics

Background:

  • Previous studies on quantum tunneling through single or few barriers.
  • Limited understanding of tunneling dynamics with an arbitrary number of barriers.

Purpose of the Study:

  • To investigate quantum tunneling through multiple finite rectangular opaque barriers.
  • To generalize and extend existing results on tunneling phase time.
  • To identify and analyze peculiar, testable features of multibarrier tunneling.

Main Methods:

  • Theoretical analysis of quantum tunneling.
  • Mathematical generalization of tunneling phase time calculations.
  • Investigation of interbarrier multiple reflections.

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Main Results:

  • Total tunneling phase time is independent of barrier thickness and interbarrier separation.
  • Transit time (nonresonant) and resonant frequency are independent of the number of barriers.
  • Multibarrier tunneling exhibits nonlocal characteristics due to multiple reflections.

Conclusions:

  • Quantum tunneling through multiple barriers is a nonlocal phenomenon.
  • The independence of transit time and resonant frequency offers direct experimental verification possibilities.
  • Findings generalize previous tunneling research and provide new insights into complex barrier systems.