scholarly journals Analysis of wavepacket tunneling with the method of Laplace transformation

2019 ◽  
Vol 33 (12) ◽  
pp. 1950107 ◽  
Author(s):  
Natascha Riahi
Keyword(s):  
Laplace Transformation ◽  
Experimental Result ◽  
Tunneling Time ◽  
Hartman Effect ◽  
Subsequent Wave

We use the method of Laplace transformation to determine the dynamics of a wavepacket that passes a barrier by tunneling. We investigate the transmitted wavepacket and find that it can be resolved into a sequence of subsequent wave packages. This result sheds new light on the Hartman effect for the tunneling time and gives a possible explanation for an experimental result obtained by Spielmann et al.

On the tunneling time of arbitrary continuous potentials and the Hartman effect

2010 ◽  
Vol 19 (11) ◽  
pp. 117305 ◽  
Author(s):  
Cheng Yin ◽  
Zhi-Jing Wu ◽  
Xian-Ping Wang ◽  
Jing-Jing Sun ◽  
Zhuang-Qi Cao
Keyword(s):  
Tunneling Time ◽  
Hartman Effect

The Hartman effect in graphene systems

2017 ◽  
Vol 31 (01) ◽  
pp. 1650250 ◽  
Author(s):  
Mohammad Esmailpour ◽  
Hakimeh Mohammadpour ◽  
Hamideh Hadavifar
Keyword(s):  
Incident Energy ◽  
Energy Levels ◽  
Single Layer ◽  
Normal Incidence ◽  
Bilayer Graphene ◽  
Single Layer Graphene ◽  
Monolayer Graphene ◽  
Tunneling Time ◽  
Layer Graphene ◽  
Hartman Effect

The present paper investigates that the tunneling time for bilayer graphene potential barrier with monolayer graphene leads to all range of energy. Numerical results reveal that parameters such as the incident energy and angle plays a significant role in inducing of the Hartman effect. In contrast to single-layer graphene, in the bilayer graphene, due to the chirality of quasi-particles induction of Klein and Hartman effects occur in the normal incidence case. Moreover, it is demonstrated that even for energy levels above barrier, the Hartman effect is present.

scholarly journals Tunneling time and Hartman effect in a ferromagnetic graphene superlattice

AIP Advances ◽  
2012 ◽  
Vol 2 (1) ◽  
pp. 012123 ◽  
Author(s):  
Farhad Sattari ◽  
Edris Faizabadi
Keyword(s):  
Tunneling Time ◽  
Hartman Effect ◽  
Graphene Superlattice

Decrease of the tunneling time and violation of the Hartman effect for large barriers

2004 ◽  
Vol 70 (3) ◽  
Author(s):  
V. S. Olkhovsky ◽  
V. Petrillo ◽  
A. K. Zaichenko
Keyword(s):  
Tunneling Time ◽  
Hartman Effect

Determination of arsenic atom distribution arsenic doped silicon using HOLZ-line analysis

1996 ◽  
Vol 54 ◽  
pp. 976-977
Author(s):  
Y. Kikuchi ◽  
N. Hashikawa ◽  
F. Uesugi ◽  
E. Wakai ◽  
K. Watanabe ◽  
...  
Keyword(s):  
Inelastic Scattering ◽  
Zone Axis ◽  
Experimental Result ◽  
Background Intensity ◽  
Crystal Thickness ◽  
Arsenic Atom ◽  
Doped Silicon ◽  
P Type ◽  
Line Analysis

In order to measure the concentration of arsenic atoms in nanometer regions of arsenic doped silicon, the HOLZ analysis is carried out underthe exact [011] zone axis observation. In previous papers, it is revealed that the position of two bright lines in the outer SOLZ structures on the[011] zone axis is little influenced by the crystal thickness and the background intensity caused by inelastic scattering electrons, but is sensitive to the concentration of As atoms substitutbnal for Siatomic site.As the result, it becomes possible to determine the concentration of electrically activated As atoms in silicon within an observed area by means of the simple fitting between experimental result and dynamical simulatioan. In the present work, in order to investigate the distribution of electrically activated As in silicon, the outer HOLZ analysis is applied using a nanometer sized probe of TEM equipped with a FEG.Czodiralsld-gown<100>orientated p-type Si wafers with a resistivity of 10 Ώ cm are used for the experiments.TheAs+ implantation is performed at a dose of 5.0X1015cm-2at 25keV.

Implementation of Fuzzy Logic Control on Battery Charging System

2019 ◽  
Vol 3 (1) ◽  
pp. 118-126 ◽  
Author(s):  
Prihangkasa Yudhiyantoro
Keyword(s):  
Complex System ◽  
Fuzzy Logic ◽  
Fuzzy Logic Control ◽  
Expert Knowledge ◽  
Experimental Result ◽  
Rule Base ◽  
Battery Charging ◽  
Charging System ◽  
Logic Control ◽  
Charging Control

This paper presents the implementation fuzzy logic control on the battery charging system. To control the charging process is a complex system due to the exponential relationship between the charging voltage, charging current and the charging time. The effective of charging process controller is needed to maintain the charging process. Because if the charging process cannot under control, it can reduce the cycle life of the battery and it can damage the battery as well. In order to get charging control effectively, the Fuzzy Logic Control (FLC) for a Valve Regulated Lead-Acid Battery (VRLA) Charger is being embedded in the charging system unit. One of the advantages of using FLC beside the PID controller is the fact that, we don’t need a mathematical model and several parameters of coefficient charge and discharge to software implementation in this complex system. The research is started by the hardware development where the charging method and the combination of the battery charging system itself to prepare, then the study of the fuzzy logic controller in the relation of the charging control, and the determination of the parameter for the charging unit will be carefully investigated. Through the experimental result and from the expert knowledge, that is very helpful for tuning of the  embership function and the rule base of the fuzzy controller.

Evaluation of Experimental Result and Utility of Flux Modulated Type Magnetic Gear

2013 ◽  
Vol 133 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Yuji Enomoto ◽  
Norihisa Iwasaki ◽  
Masashi Kitamura ◽  
Masahiro Mita ◽  
Masahiro Masuzawa
Keyword(s):  
Experimental Result ◽  
Magnetic Gear

Conservative solute transport with periodic velocity and sinusoidal source concentration in semi-infinite porous media: An analytical solution

2014 ◽  
Vol 6 (1) ◽  
pp. 1024-1031
Author(s):  
R R Yadav ◽  
Gulrana Gulrana ◽  
Dilip Kumar Jaiswal
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Laplace Transformation ◽  
Seepage Velocity ◽  
Transformation Technique ◽  
Numerical Examples ◽  
One Dimensional ◽  
Porous Domain ◽  
Conservative Solute Transport ◽  
Source Concentration

The present paper has been focused mainly towards understanding of the various parameters affecting the transport of conservative solutes in horizontally semi-infinite porous media. A model is presented for simulating one-dimensional transport of solute considering the porous medium to be homogeneous, isotropic and adsorbing nature under the influence of periodic seepage velocity. Initially the porous domain is not solute free. The solute is initially introduced from a sinusoidal point source. The transport equation is solved analytically by using Laplace Transformation Technique. Alternate as an illustration; solutions for the present problem are illustrated by numerical examples and graphs.

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