Results 31 to 40 of about 13,468,968 (349)

Microscopic calculations beyond mean-field with zero-range effective interactions

EPJ Web of Conferences, 2012
A completely microscopic formalism has been developed to treat the observable properties of single-particle states (e.g. energies and spectroscopic factors), as well as of collective states (e.g., their energy centroid, their damping width and their ...
Bortignon P. F., Colò G., Brenna M., Roca-Maza X.   +3 more
doaj   +1 more source

Some Properties of String Field Algebra [PDF]

, 2001
We examine string field algebra which is generated by star product in Witten's string field theory including ghost part. We perform calculations using oscillator representation consistently.
Kishimoto, Isao
core   +2 more sources

New Method of Vector Control in PMSM Motors

IEEE Access, 2023
The paper introduces a new method for vector control of PMSM (Permanent Magnet Synchronous Motor) motors called theta-FOC. This method combines the advantages of simple sinusoidal control and Field Oriented Control (FOC).
Krzysztof Kolano
doaj   +1 more source

Crystal-field splitting for low symmetry systems in ab initio calculations [PDF]

, 2005
In the framework of the LDA+U approximation we propose the direct way of calculation of crystal-field excitation energy and apply it to La and Y titanates.
A. Abragam, A. O. Shorikov, A. S. Mylnikova, C. J. Ballhausen, D. I. Khomskii, H. Sawada, J. B. Goodenough, J. P. Elliott, J. R. Hester, K. I. Kugel, R. D. Shannon, S. V. Streltsov, V. I. Anisimov, Z. V. Pchelkina   +13 more
core   +1 more source

Excited state calculations in solids by auxiliary-field quantum Monte Carlo

New Journal of Physics, 2013
We present an approach for ab initio many-body calculations of excited states in solids. Using auxiliary-field quantum Monte Carlo, we introduce an orthogonalization constraint with virtual orbitals to prevent collapse of the stochastic Slater ...
Fengjie Ma, Shiwei Zhang, Henry Krakauer
doaj   +1 more source

Numerical Quantum Field Theory on the Continuum and a New Look at Perturbation Theory [PDF]

, 2001
The Source Galerkin method finds approximate solutions to the functional differential equations of field theories in the presence of external sources. While developing this process, it was recognized that approximations of the spectral representations of
D. Petrov, Easther, Easther, Emirdag, Fletcher, G.S. Guralnik, García, Lawson, Lawson, P. Emirdağ, Petrov, R. Easther, S.C. Hahn   +12 more
core   +3 more sources

Cluster Dynamical Mean-field calculations for TiOCl

, 2007
Based on a combination of cluster dynamical mean field theory (DMFT) and density functional calculations, we calculated the angle-integrated spectral density in the layered $s=1/2$ quantum magnet TiOCl.
A Lichtenstein, Abel E T Matan K Chou F C Isaacs E D Moncton D E Sinn H Alatas A Lee Y S, Andersen O K, Craco L, Lemmens P, M Hoinkis, M Sing, Maule C H, Pisani L, Pisani L Jeschke H O Saha-Dasgupta T Valentí R, Pisani L Valentí R Montanari B Harrison N, Poteryaev A Lichtenstein A, R Claessen, R Valentí, Rückamp R, S Glawion, Saha-Dasgupta T, T Saha-Dasgupta   +17 more
core   +1 more source

The application of tailor-made force fields and molecular dynamics for NMR crystallography: a case study of free base cocaine

IUCrJ, 2017
Motional averaging has been proven to be significant in predicting the chemical shifts in ab initio solid-state NMR calculations, and the applicability of motional averaging with molecular dynamics has been shown to depend on the accuracy of the ...
Xiaozhou Li, Marcus A. Neumann, Jacco van de Streek   +2 more
doaj   +1 more source

Accurate Field‐Effect Mobility and Threshold Voltage Estimation for Thin‐Film Transistors with Gate‐Voltage‐Dependent Mobility in Linear Region

Advanced Electronic Materials, 2023
The measurement of mobility and threshold voltage in thin‐film transistors (TFTs) in which the mobility is a function of gate voltage or carrier density is usually done inaccurately.
Yuchen Zhou, Xiao Wang, Ananth Dodabalapur   +2 more
doaj   +1 more source

A class–field theoretical calculation [PDF]

Journal de théorie des nombres de Bordeaux, 2008
In this paper, we give the complete characterization of the p–torsion subgroups of certain idèle–class groups associated to characteristic p function fields. As an application, we answer a question which arose in the context of Tan’s approach [6] to an important particular case of a generalization of a conjecture of Gross [4] on special values of L ...
openaire   +1 more source