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Showing 1 to 17 of 17 for “"Poisson Solver"”.
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Adaptive Spectrally Localized Three-Dimensional Schroedinger Poisson Solver
The number of iterations required is not dependent on the size of the grid. This method is O(kN), where k is the number of eigenvalues desired and N is the number of grid points. Any subset of the eigenvalue spectrum can be found without the need to find eigenvalues outside of that range.
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Quantum Monte Carlo With a *Stochastic Poisson Solver
… an alternative approach of solving the Poisson equation by a classical Monte Carlo within the overall QMC scheme. We have developed a modified ""Walk On Spheres"" (WOS) algorithm using Green's function techniques, which can efficiently account for the interaction energy of walker …
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A user-friendly interface for a poisson-solver
Thesis: B.S., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1987
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Boundary method-based domain decomposition on multiprocessors
… the fast solution of the boundary problems of Poisson's equation on irregular as well as regular domains. The method, called the boundary method-based domain decomposition or BMDD, combines the attractiveness of the domain decomposition technique in parallel solution of the boundary value …
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A meshfree method for the Poisson equation with 3D wall-bounded flow application
The numerical approximation of the Poisson equation can often be found as a subproblem to many more complex computations. In the case of Lagrangian approaches of flow equations, the Poisson equation often needs to be solved on an irregular point distribution. Currently, mainly unstructured …
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Nonlinear simulation of tumor growth and chemotherapy
… include a robust boundarycondition-capturing Poisson solver, improved discretizations of the normal vector and curvature, anew technique for extending variables beyond the zero level set, and a new application of Gaussianfilter technology ordinarily associated with image processing. We conduct …
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A fast enriched FEM for Poisson equations involving interfaces
… fast enriched finite element method for solving Poisson equations involving complex geometry interfaces by using regular Cartesian grids. The presence of interfaces is accounted for by developing suitable jump conditions. The immersed boundary method (IBM) and the immersed interface method (IIM) …
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PIC simulation of a ceramic-lined Hall-effect thruster
… algorithm solves the Gauss' formulation of the Poisson equation. Collisions include electron-neutral single and double ionization, and elastic scattering, electron-ion double ionization, ion-neutral elastic scattering and chargeexchange. A few tricks are used to decrease the computation time: …
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Direct numerical simulation of droplet-laden isotropic turbulence
… main advantage is that the variable coefficient Poisson equation that arises in solving the incompressible Navier-Stokes equations for two-fluid flows is reduced to a constant coefficient equation. This equation can then be solved directly using, e.g., the FFT-based parallel Poisson solver. For a …
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Kinetic modeling of electrodynamic space tethers
… plasma, thanks to the implementation of a Fast Poisson Solver. Multiwire modelling is available as well to study the interference and efficiency of parallel tether array configurations. The theory of current collection has then been further developed, by showing the existence of electron …
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Surface transfer doping of diamond for power electronics
… a numerical approach based on a Schrödinger-Poisson solver package. We identify key inconsistencies in the generic valence-to-conduction transfer model for both shallow and deep TMO electron affinity regimes. We report that introducing deep level impurities in the TMO have shown improvements …
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Feasibility of superconductivity in semiconductor superlatices
… doped high - Tc superconductors. A Schrodinger-Poisson solver, developed by Snider, is applied to the problem of determining the appropriate semiconductor layers for creating equilibrium electron-hole superlattices in the GaAs-A1xGa1-xAs system. Formation of equilibrium electron-hole …
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Monte Carlo Simulation of Nanostructures: Semiconductor Devices to Ion Channels
… with the results obtained from the Schrodinger-Poisson solver to test the validity of the model. Device simulations of finFET devices show that quantum effects do not have significant effect on device currents. Furthermore, the presence of long fin extension regions can significantly downgrade …
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Enhancement of Monte Carlo Simulations on Three-Dimensional Nanoscale Semiconductor Devices
… semiclassical potential distribution computed by Poisson solver and the quantum potential distribution by Schrodinger solver.
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Simulation and microwave measurement of the conductivity of carbon nanotubes
… equation is solved self-consistently with Poisson‟s equation. The Poisson equation, which defines the potential distribution on the surface of the nanotube, is computed using a two-dimensional finite difference algorithm exploiting the azimuthal symmetry. A solution to the Schrodinger‟s …
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MULTISCALE MODELING OF III-NITRIDE CORE-SHELL SOLAR CELLS
… potential distributions using a 3-D atomistic Poisson solver; 4) Computing the single-particle electronic structure and optical transition rates using a 10- band sp3 s*-spin tight-binding framework; and 5) Using a TCAD toolkit, study the carrier transport and obtain the device terminal …
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Multiscale numerical simulations of the magnetized plasma sheath with massively parallel electrostatic particle-in-cell code
… named hPIC, solving the multi-species Boltzmann-Poisson integro-differential set of equations. We give an overview of the model equations, of the architecture of the code, and summarize the verification tests, also presenting the scalability tests performed on the Blue Waters supercomputer at the …