scholarly journals An Open Dynamical System Approach to Dissipative Quantum Dot Array Antennas

2022 ◽  
Author(s):  
Said Mikki
Keyword(s):  
Quantum Dot ◽  
Master Equation ◽  
Quantum Dynamics ◽  
Antenna System ◽  
Computational Approach ◽  
Quantum Dissipation ◽  
Analysis And Design ◽  
Quantum Radiation ◽  
Open Dynamical System ◽  
External Signals

A new computational approach to quantum antennas based on first principle open stochastic quantum dynamics.<div><br></div><div>We develop a general computational approach for the analysis and design of quantum antenna systems comprised of coupled quantum dot arrays interacting with external fields and producing quantum radiation. The method is based on using the GKSL master equation to model quantum dissipation and decoherence. The density operator of a coupled two-level quantum dot (qbit) array, excited by classical external signals with variable amplitude and phase, is evolved in time using a quantum Liouville-like equation (the master equation). We illustrate the method in a numerical example where it is shown that manipulating the phase excitations of individual quantum dots may significantly enhance the directive radiation properties of the quantum dot antenna system<br></div>

scholarly journals An Open Dynamical System Approach to Dissipative Quantum Dot Array Antennas

2022 ◽  
Author(s):  
Said Mikki
Keyword(s):  
Quantum Dot ◽  
Master Equation ◽  
Quantum Dynamics ◽  
Antenna System ◽  
Computational Approach ◽  
Quantum Dissipation ◽  
Analysis And Design ◽  
Quantum Radiation ◽  
Open Dynamical System ◽  
External Signals

A new computational approach to quantum antennas based on first principle open stochastic quantum dynamics.<div><br></div><div>We develop a general computational approach for the analysis and design of quantum antenna systems comprised of coupled quantum dot arrays interacting with external fields and producing quantum radiation. The method is based on using the GKSL master equation to model quantum dissipation and decoherence. The density operator of a coupled two-level quantum dot (qbit) array, excited by classical external signals with variable amplitude and phase, is evolved in time using a quantum Liouville-like equation (the master equation). We illustrate the method in a numerical example where it is shown that manipulating the phase excitations of individual quantum dots may significantly enhance the directive radiation properties of the quantum dot antenna system<br></div>

scholarly journals Cubesat Antenna Analysis and Design: Are you using the right computational electromagnetic tool?

2021 ◽  
Vol 10 (2) ◽  
pp. 1-18
Author(s):  
I. Latachi ◽  
T. Rachidi ◽  
M. Karim
Keyword(s):  
Selection Process ◽  
Critical Role ◽  
Antenna System ◽  
Antenna Design ◽  
Design Processes ◽  
Analysis And Design ◽  
Trade Offs ◽  
Development Costs ◽  
Communication Links ◽  
The Right

Antenna systems play a critical role in establishing wireless communication links and sustaining remote sensing requirements for Cubesat applications. In addition to the usual antenna design requirements, Cubesat-based spacecrafts impose additional stringent constraints related to the on-board available space, power consumption and development costs. To develop optimal antenna prototypes while considering all these constraints and decrease trial and error related costs, computational electromagnetics (CEM) simulation tools are used. The accuracy of simulation results depends to a great extent on the choice of the appropriate CEM tool for the particular antenna problem to be analyzed; ergo, identifying and answering key questions about design objectives and requirements is necessary for informed decision-making throughout the selection and design processes. However, this could be quite challenging because of existing gaps both in the practitioners’ knowledge about different CEM tools capabilities, limitations, and design know-how. This is especially true for non-specialists such as students and academics involved in student driven Cubesat projects. Therefore, the rationale of this manuscript is to bridge those gaps and clarify some common misconception commonly encountered during the selection and design processes. In that regard, first, an overview of existing antenna configurations commonly used in Cubesat communications is provided. Next, antenna design general workflow is presented. Then, capabilities and limitations of different CEM solving methods are presented. After that, CEM software selection process trade-offs and possible sources of errors are discussed from a practical viewpoint. Finally, a case study of Masat-1 antenna system design is presented as practical example.

scholarly journals Quantum dynamics of optical phonons generated by optical excitation of a quantum dot

2016 ◽  
Vol 15 (4) ◽  
pp. 1158-1169 ◽  
Author(s):  
Daniel Wigger ◽  
Helge Gehring ◽  
V. Martin Axt ◽  
Doris E. Reiter ◽  
Tilmann Kuhn
Keyword(s):  
Quantum Dot ◽  
Quantum Dynamics ◽  
Optical Excitation ◽  
Optical Phonons

scholarly journals Quantifying non-Markovianity for a chromophore–qubit pair in a super-Ohmic bath

2015 ◽  
Vol 17 (12) ◽  
pp. 8087-8096 ◽  
Author(s):  
Jing Liu ◽  
Kewei Sun ◽  
Xiaoguang Wang ◽  
Yang Zhao
Keyword(s):  
Master Equation ◽  
Quantum Dynamics

An approach based on a non-Markovian time-convolutionless polaron master equation is used to probe the quantum dynamics of a chromophore–qubit pair in a super-Ohmic bath and to quantify its non-markovianity.

scholarly journals A general approach to quantum dynamics using a variational master equation: Application to phonon-damped Rabi rotations in quantum dots

2011 ◽  
Vol 84 (8) ◽  
Author(s):  
Dara P. S. McCutcheon ◽  
Nikesh S. Dattani ◽  
Erik M. Gauger ◽  
Brendon W. Lovett ◽  
Ahsan Nazir
Keyword(s):  
Quantum Dots ◽  
Master Equation ◽  
Quantum Dynamics
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