Interference effects on bound-to-continuum quantum dot absorption

2010 ◽  
Vol 107 (8) ◽  
pp. 083102 ◽  
Author(s):  
J. Houel ◽  
S. Sauvage ◽  
A. Lemaître ◽  
P. Boucaud
Keyword(s):  
Quantum Dot ◽  
Interference Effects

scholarly journals Dicke and Fano-Andreev reflections in a triple quantum-dot system

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
A. González I. ◽  
M. Pacheco ◽  
A. M. Calle ◽  
E. C. Siqueira ◽  
P. A. Orellana
Keyword(s):  
Quantum Dot ◽  
Electronic Transport ◽  
Linear Response ◽  
Quantum Interference ◽  
Andreev Reflection ◽  
Interference Effects ◽  
Anderson Hamiltonian ◽  
Abrupt Changes ◽  
Non Equilibrium Green’S Function ◽  
Non Equilibrium

AbstractThis article studies quantum interference effects and their influence on the electronic transport through a parallel triple quantum-dot system coupled to normal and superconducting leads in the linear response and non-equilibrium regime. We model the system by a triple impurity Anderson Hamiltonian including the Coulomb intra-dot correlations in all quantum-dots. Using the non-equilibrium Green’s function formalism, we calculate the Andreev conductance and the transmittance for energies within the superconductor gap. Our results show that the Andreev reflection spectra, both in the presence and absence of Coulomb interaction, reveal Fano and Dicke-like resonances in analogy to the Fano and Dicke effects in atomic physics. As one of the main results, we obtain that the charge shows abrupt changes due to the Dicke effect.

Some Aspects of Exelfs Analysis in the Electron Microscope

1980 ◽  
Vol 38 ◽  
pp. 118-119
Author(s):  
D. E. Johnson ◽  
S. Csillag
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Energy Loss ◽  
Analytical Electron Microscopy ◽  
Interference Effects ◽  
Interatomic Distances ◽  
X Ray ◽  
Structure Information ◽  
Microanalytical Technique ◽  
Analytical Electron

Recently, the applications area of analytical electron microscopy has been extended to include the study of Extended Energy Loss Fine Structure (EXELFS). Modulations past an ionization edge in the energy loss spectrum (EXELFS), contain atomic fine structure information similar to Extended X-ray Absorbtion Fine Structure (EXAFS). At low momentum transfer the main contribution to these modulations comes from interference effects between the outgoing excited inner shell electron waves and electron waves backscattered from the surrounding atoms. The ability to obtain atomic fine structure information (such as interatomic distances) combined with the spatial resolution of an electron microscope is unique and makes EXELFS an important microanalytical technique.

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