A study of transit times in Dirac tunneling

Autor(es)

De Leo, Stefano ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Appl Math, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Physics A-Mathematical and Theoretical; v. 46, n. 15 APR 19 2013.
• Citações Web of Science: 0

Resumo

Based on the Dirac equation, the behavior of relativistic electrons which tunnel a potential barrier of height V-0 for incoming energies between V-0 and V-0 + m is studied by using the wave packet formalism. The choice of this incoming energy zone guarantees that only electrons participate in the tunneling process. In the opaque limit, as shown in a previous analysis, the transit velocity is proportional to the barrier width and for relativistic potential tends to a constant value greater than c. In this paper, a new numerical study shows a very surprising result: superluminal transmissions are also evident for thin barriers. (AU)

• Processo FAPESP: 10/02213-3 - O formalismo de pacotes de ondas no estudo de equações diferenciais em mecânica quântica relativistica
• Beneficiário: Stefano de Leo
• Modalidade de apoio: Auxílio à Pesquisa - Regular