Results 31 to 40 of about 2,048,021 (302)

Improved tensor-product expansions for the two-particle density matrix

open access: yes, 2001
We present a new density-matrix functional within the recently introduced framework for tensor-product expansions of the two-particle density matrix. It performs well both for the homogeneous electron gas as well as atoms.
A.K.M. Müller   +29 more
core   +1 more source

Understanding the core density profile in TCV H-mode plasmas

open access: yes, 2012
Results from a database analysis of H-mode electron density profiles on the Tokamak \`a Configuration Variable (TCV) in stationary conditions show that the logarithmic electron density gradient increases with collisionality.
A Pitzschke   +29 more
core   +1 more source

Shock-wave-based density down ramp for electron injection

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2012
We demonstrate a sharp density transition for electron injection in laser wakefield acceleration through numerical study. This density transition is generated by a detached shock wave induced by a cylinder inserted into a supersonic helium gas flow. In a
Chunmei Wang   +3 more
doaj   +1 more source

Study on Electron Density Anomalies Possibly Related to Earthquakes Based on CSES Observations

open access: yesRemote Sensing, 2023
This research examines the correlation between seismic activity and variations in ionospheric electron density (Ne) using the data from the Langmuir probe (LAP) onboard the China Seismo-Electromagnetic Satellite (CSES) during nighttime.
Chengcheng Han   +8 more
doaj   +1 more source

Tunneling Density of States of the Interacting Two-Dimensional Electron Gas

open access: yes, 2003
We investigate the influence of electron--electron interactions on the density of states of a ballistic two--dimensional electron gas. The density of states is determined nonperturbatively by means of path integral techniques allowing for reliable ...
B. L. Altshuler   +7 more
core   +1 more source

Ionospheric S4 Scintillations from GNSS Radio Occultation (RO) at Slant Path

open access: yesRemote Sensing, 2020
Ionospheric scintillation can significantly degrade the performance and the usability of space-based communication and navigation signals. Characterization and prediction of ionospheric scintillation can be made from the Global Navigation Satellite ...
Dong L. Wu
doaj   +1 more source

First Experimental Quantitative Charge Density Studies of Advanced Intermediate of Vitamin D Analogues

open access: yesMolecules, 2022
Vitamins D are a group of fat-soluble secosteroids which play a regulatory role in the functioning of most cells. Rational design of new vitamin D analogs, of increased therapeutic potency and lowered calcemic side effects, requires high-resolution ...
Monika Wanat   +3 more
doaj   +1 more source

A local density functional for the short-range part of the electron-electron interaction

open access: yes, 2004
Motivated by recent suggestions --to split the electron-electron interaction into a short-range part, to be treated within the density functional theory, and a long-range part, to be handled by other techniques-- we compute, with a diffusion Monte Carlo ...
A. Savin   +9 more
core   +1 more source

Effect of free valence on the electronic structure of n-alcohol radicals

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2023
The paper presents the results of a study of the effect of free valence (when a hydrogen atom is separated) on the electronic structure of n-alcohol radicals by the example of radicals of n-heptanol derivatives (C●H2-(CH2)6OH, CH3-C●H-(CH2)5OH, C2H5-C●H-(
V.V. Turovtsev   +3 more
doaj   +1 more source

Momentum space properties from coordinate space electron density

open access: yes, 2005
Electron density and electron momentum density, while independently tractable experimentally, bear no direct connection without going through the many-electron wave function.
Anjali Kshirsagar   +4 more
core   +1 more source

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