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Showing 1 to 20 of 51 for “"Monte Carlo calculations"”.
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Eliminating critical slowing down in Monte Carlo calculations
… theory. Traditional Metropolis and heat bath Monte Carlo methods in lattice calculations break down whenever one tries to calculate thermodynamic quantities near critical points; this phenomenon is called Critical Slowing Down, (CSD). Recently, alternate methods have been proposed to shorten …
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Eliminating critical slowing down in Monte Carlo calculations
… theory. Traditional Metropolis and heat bath Monte Carlo methods in lattice calculations break down whenever one tries to calculate thermodynamic quantities near critical points; this phenomenon is called Critical Slowing Down, (CSD). Recently, alternate methods have been proposed to shorten …
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Green's function Monte Carlo calculations of few-nucleon systems
… basis for our variational wave functions and the Monte Carlo techniques used to evaluate expectation values with these wave functions. To determine the exact ground state, Green's function Monte Carlo (GFMC) techniques are used. We review the method of GFMC in general and then discuss its …
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Green's function Monte Carlo calculations of few nucleon systems
Restriction data tranferred 2014-07-01T11:12:08-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis
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Monte Carlo calculations parallel and perpendicular electron transport in gallium arsenide heterolayers
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-20T13:42:44Z No. of bitstreams: 1 1987_artaki.pdf: 2188006 bytes, checksum: 6c4f6ab8c9a6ed15ca177914733ab48a (MD5)
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Monte Carlo Calculations of Parallel and Perpendicular Electron Transport in Gallium-Arsenide Heterolayers
… for up to 5 electronic subbands. Ensemble Monte Carlo simulations which incorporate electron-electron scattering and the effect of degeneracy are used to study the dynamics of the electrons for various values of the electric field. The dependence of the mobility on the value chosen for the …
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Cumulative migration method for computing multi-group transport cross sections and diffusion coefficients with Monte Carlo calculations
… methods are needed for the many full-core calculations required for safe and efficient operation of nuclear power plants. Multi-group diffusion coefficients and transport cross sections are the crucial parameters that balance efficiency and accuracy in full-core simulations. However, it is …
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Thermodynamics of ionic liquid solvents in gas purification and exfoliation mechanisms: molecular dynamics simulation and Monte Carlo calculations
Demand for green sources of energy is increasing due to the critical need to decrease greenhouse gas emissions. This research involved different approaches for reducing CO2 emission to the atmosphere. In the first study, the exfoliation of bismuth telluride (Bi2Te3) as a well-know thermoelectric …
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Quantum Monte Carlo Calculations of the Electronic Excitations of Germanium Atoms, Molecules and Nanoclusters Using Core-Polarization Potentials
… The CPP is found to be important for accurate calculations of the total energy, and for excitations of atoms and small molecules. However, there are only small changes in the lowest optical excitations of larger clusters, which can be understood in terms of the nature of the excitations, mainly …
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Quantum Monte Carlo Calculations of the Electronic excitations of GE atoms, molecules and Nanoclusters Using Core-polarization Potentials
Made available in DSpace on 2012-11-11T17:34:22Z (GMT). No. of bitstreams: 1 Vincent_Jordan.pdf: 1813578 bytes, checksum: 000c75ebbdce02ae4ef0a1b33bfd67e6 (MD5) Previous issue date: 2001
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Variable Fidelity Monte Carlo Neutron Transport: On Combining Multi-Group and Continuous Energy Representation in Monte Carlo Calculations
This thesis investigates the feasibility of Monte Carlo (MC) neutronic calculations that combine multi-group (MG) and continuous energy (CE) representation of nuclear interaction data in different spatial regions. In general, MG MC calculations run 3-4 times faster than CE MC. Thus, it might be …
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Simulation der Nanostrukturbildung in Alkali-dotierten Fullerenschichten
… dynamics, empirical molecular dynamics, Monte-Carlo calculations as well as other methods. The doped fullerene layers show the highest superconducting critical temperature among organic superconductors. A new electrochemical method of synthesis of potassium and rubidium fullerides has …
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Use of correlation matrices in lattice QCD
… the use of correlation matrices in analyzing Monte Carlo calculations from lattice quantum chromodynamics. Correlation matrices are a powerful tool for examining many problems in which significant correlations exist, and thus offer potential advantages for lattice QCD. Several models were used …
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High frequency phonon propagation and detection in III-V semiconductors
… focusing. Experimental data is compared to Monte Carlo calculations and it is shown that the heat flux from phonons scattered a few times in the bulk retains a significan~ degree of anisotropy. The scattering rate of 0. 7 ·., THz phonons in GaAs is measured and a difference between the …
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Improved wave functions for quantum Monte Carlo
Quantum Monte Carlo (QMC) methods can yield highly accurate energies for correlated quantum systems. QMC calculations based on many-body wave functions are considerably more accurate than density functional theory methods, and their accuracy rivals that of the most sophisticated quantum chemistry …
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Search For Muon-associated Neutrino---> Electron-associated Neutrino Oscillations In A Narrow Band Neutrino Beam
… is compared to the expected background from Monte Carlo calculations and an excess of 22.4 $\pm$ 5.6 $\pm$ $\sbsp{3.8}{4.4}$ events above background is found. The excess represents a 3 standard deviation effect and may suggest a neutrino oscillation.
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From Hypernuclei to Hypermatter: a Quantum Monte Carlo Study of Strangeness in Nuclear Structure and Nuclear Astrophysics
… work presents the recent developments in Quantum Monte Carlo calculations for nuclear systems including strange degrees of freedom. The Auxiliary Field Diffusion Monte Carlo algorithm has been extended to the strange sector by the inclusion of the lightest among the hyperons, the Λ particle. …
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Search for vμ --> ve oscillations in a narrow band neutrino beams
… is compared to the expected background from Monte Carlo calculations and an excess of 22.4±5.6± 4.4 3.8 events above background is found. The excess represents a 3 standard deviation effect and may suggest a neutrino oscillation. The ratio of the acceptance corrected number of Ve and v, …
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