Droplet etching during semiconductor epitaxy for single and coupled quantum structures

2018 ◽  
Author(s):  
Christian Heyn ◽  
Michael Zocher ◽  
Achim Küster ◽  
Wolfgang Hansen
Keyword(s):  
Quantum Structures ◽  
Droplet Etching

scholarly journals Droplet etching of deep nanoholes for filling with self-aligned complex quantum structures

2016 ◽  
Vol 11 (1) ◽  
Author(s):  
Achim Küster ◽  
Christian Heyn ◽  
Arne Ungeheuer ◽  
Gediminas Juska ◽  
Stefano Tommaso Moroni ◽  
...  
Keyword(s):  
Quantum Structures ◽  
Droplet Etching

scholarly journals Hunting for Gravitational Quantum Spikes

Universe ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 49
Author(s):  
Andrzej Góźdź ◽  
Włodzimierz Piechocki ◽  
Grzegorz Plewa ◽  
Tomasz Trześniewski
Keyword(s):  
Initial Data ◽  
Fundamental Importance ◽  
Quantum Structures ◽  
Subtle Effect ◽  
Gravitational Systems ◽  
Numerical Tools ◽  
The Universe

We present the result of our examination of quantum structures called quantum spikes. The classical spikes that are known in gravitational systems, occur in the evolution of the inhomogeneous spacetimes. A different kind of spikes, which we name strange spikes, can be seen in the dynamics of the homogeneous sector of the Belinski–Khalatnikov–Lifshitz scenario. They can be made visible if the so-called inhomogeneous initial data are used. The question to be explored is whether the strange spikes may survive quantization. The answer is in the affirmative. However, this is rather a subtle effect that needs further examination using sophisticated analytical and numerical tools. The spikes seem to be of fundamental importance, both at classical and quantum levels, as they may serve as seeds of real structures in the universe.

scholarly journals Residuated Structures and Orthomodular Lattices

Studia Logica ◽  
2021 ◽  
Author(s):  
D. Fazio ◽  
A. Ledda ◽  
F. Paoli
Keyword(s):  
Algebraic Logic ◽  
Residuated Lattices ◽  
Quantum Structures ◽  
Heyting Algebras ◽  
Quantum Algebras ◽  
Orthomodular Lattices ◽  
Lattice Of Subvarieties ◽  
Residuated Structures ◽  
Common Framework ◽  
Mv Algebras

AbstractThe variety of (pointed) residuated lattices includes a vast proportion of the classes of algebras that are relevant for algebraic logic, e.g., $$\ell $$ ℓ -groups, Heyting algebras, MV-algebras, or De Morgan monoids. Among the outliers, one counts orthomodular lattices and other varieties of quantum algebras. We suggest a common framework—pointed left-residuated $$\ell $$ ℓ -groupoids—where residuated structures and quantum structures can all be accommodated. We investigate the lattice of subvarieties of pointed left-residuated $$\ell $$ ℓ -groupoids, their ideals, and develop a theory of left nuclei. Finally, we extend some parts of the theory of join-completions of residuated $$\ell $$ ℓ -groupoids to the left-residuated case, giving a new proof of MacLaren’s theorem for orthomodular lattices.

GaN-based pyramidal quantum structures for micro-size light-emitting diode applications

2021 ◽  
Vol 118 (14) ◽  
pp. 142102
Author(s):  
Son Phuong Le ◽  
Chih-Wei Hsu ◽  
Ivan Martinovic ◽  
Per-Olof Holtz
Keyword(s):  
Light Emitting Diode ◽  
Quantum Structures ◽  
Light Emitting

Growth of (Zn)CdSe quantum structures on vicinal GaAs(001) substrates: step flow growth versus strain effects

2000 ◽  
Vol 214-215 ◽  
pp. 606-609 ◽  
Author(s):  
T Passow ◽  
H Heinke ◽  
D Kayser ◽  
K Leonardi ◽  
D Hommel
Keyword(s):  
Quantum Structures ◽  
Strain Effects ◽  
Step Flow ◽  
Step Flow Growth ◽  
Versus Strain

Different pressure behavior of GaN/AlGaN quantum structures grown along polar and nonpolar crystallographic directions

2009 ◽  
Vol 105 (6) ◽  
pp. 063104 ◽  
Author(s):  
H. Teisseyre ◽  
A. Kamińska ◽  
G. Franssen ◽  
A. Dussaigne ◽  
N. Grandjean ◽  
...  
Keyword(s):  
Quantum Structures ◽  
Pressure Behavior

scholarly journals Comparison of Iteration Schemes for the Solution of the Multidimensional Schrödinger-Poisson Equations

VLSI Design ◽  
1998 ◽  
Vol 8 (1-4) ◽  
pp. 105-109 ◽  
Author(s):  
A. Trellakis ◽  
A. T. Galick ◽  
A. Pacelli ◽  
U. Ravaioli
Keyword(s):  
Coupled System ◽  
Iteration Scheme ◽  
Simple Expression ◽  
Software Implementation ◽  
Quantum Structures ◽  
System Of Differential Equations ◽  
Poisson Equations ◽  
Quantum Electron ◽  
Predictor Corrector ◽  
Bound Electron

We present a fast and robust iterative method for obtaining self-consistent solutions to the coupled system of Schrödinger's and Poisson's equations in quantum structures. A simple expression describing the dependence of the quantum electron density on the electrostatic potential is used to implement a predictor – corrector type iteration scheme for the solution of the coupled system of differential equations. This approach simplifies the software implementation of the nonlinear problem, and provides excellent convergence speed and stability. We demonstrate the algorithm by presenting an example for the calculation ofthe two-dimensional bound electron states within the cross-section of a GaAs-AlGaAs based quantum wire. For this example, six times fewer iterations are needed when our predictor – corrector approach is applied, compared to a corresponding underrelaxation algorithm.

Quantum structures in macroscopic reality

1993 ◽  
Vol 32 (3) ◽  
pp. 489-498 ◽  
Author(s):  
D. Aerts ◽  
T. Durt ◽  
A. A. Grib ◽  
B. Van Bogaert ◽  
R. R. Zapatrin
Keyword(s):  
Quantum Structures
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