Time-dependent interactions in tunnelling dynamics



Título del documento: Time-dependent interactions in tunnelling dynamics
Revista: Revista mexicana de física
Base de datos: PERIÓDICA
Número de sistema: 000460834
ISSN: 0035-001X
Autores: 1
Instituciones: 1Universita degli Studi di Ferrara, Faculty of Natural Science, Ferrara, Emilia Romagna. Italia
Año:
Periodo: Mar-Abr
Volumen: 68
Número: 2
País: México
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico, teórico
Resumen en inglés In this paper, the tunnelling of a particle through a potential barrier is investigated in the presence of a time-dependent perturbation. The latter is attributed to the process of the energy measurement of the scattered particle. The time-dependent Schrödinger equation of the model is exactly solved. The calculation of the probability density inside the barrier proves that the tunnelling dynamics is determined not only by the transmitted and reflected waves but also by their interference. Furthermore, the interference term is time-dependent and contribute to the scattering process duration. The tunnelling time is calculated as the time to stop the flow of probability density inside the barrier. This is the minimum duration of the measurement process before detecting the particle beyond the barrier. Based on this, a new method of estimating the tunnelling time by energy experimental measuring is proposed
Disciplinas: Física y astronomía
Palabras clave: Gravitación,
Túnel cuántico,
Tiempo de tunelización,
Túnel cuántico,
Medición cuántica,
Ecuación de Schrodinger dependiente del tiempo
Keyword: Gravitation,
Quantum tunnelling,
Tunnelling time,
Quantum measurement,
Time-dependent Schrodinger equation
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