Investigation of excitation energies and Hund's rule in open shell quantum dots by diffusion Monte Carlo

2002 ◽  
Vol 27 (3) ◽  
pp. 385-392 ◽  
Author(s):  
L. Colletti ◽  
F. Pederiva ◽  
E. Lipparini ◽  
C.J. Umrigar
Keyword(s):  
Quantum Dots ◽  
Monte Carlo ◽  
Open Shell ◽  
Diffusion Monte Carlo ◽  
Excitation Energies ◽  
Hund’S Rule ◽  
Hund's Rule

scholarly journals Diffusion Monte Carlo study of circular quantum dots

2000 ◽  
Vol 62 (12) ◽  
pp. 8120-8125 ◽  
Author(s):  
Francesco Pederiva ◽  
C. J. Umrigar ◽  
E. Lipparini
Keyword(s):  
Quantum Dots ◽  
Monte Carlo ◽  
Monte Carlo Study ◽  
Diffusion Monte Carlo

STABILITY AND SPECTRA OF SMALL 3He-4He CLUSTERS

2006 ◽  
Vol 20 (30n31) ◽  
pp. 5071-5080
Author(s):  
J. NAVARRO ◽  
S. FANTONI ◽  
R. GUARDIOLA ◽  
A. ZUKER
Keyword(s):  
Monte Carlo ◽  
Effective Hamiltonian ◽  
Diffusion Monte Carlo ◽  
Excitation Energies ◽  
Excitation Spectra ◽  
Shell Effects ◽  
Monte Carlo Calculations ◽  
The Stability

Diffusion Monte Carlo calculations have been systematically performed to analyze the stability of small mixed 3 He -4 He clusters, as well as their excitation spectra. The picture that emerges is that of systems with strong shell effects whose binding and excitation energies are essentially determined by the monopole properties of an effective Hamiltonian.

scholarly journals Excitation energies from diffusion Monte Carlo using selected configuration interaction nodes

2018 ◽  
Vol 149 (3) ◽  
pp. 034108 ◽  
Author(s):  
Anthony Scemama ◽  
Anouar Benali ◽  
Denis Jacquemin ◽  
Michel Caffarel ◽  
Pierre-François Loos
Keyword(s):  
Monte Carlo ◽  
Configuration Interaction ◽  
Diffusion Monte Carlo ◽  
Excitation Energies

scholarly journals Influence of pseudopotentials on excitation energies from selected configuration interaction and diffusion Monte Carlo

2019 ◽  
Vol 1 ◽  
pp. 100002 ◽  
Author(s):  
Anthony Scemama ◽  
Michel Caffarel ◽  
Anouar Benali ◽  
Denis Jacquemin ◽  
Pierre-François Loos
Keyword(s):  
Monte Carlo ◽  
Configuration Interaction ◽  
Diffusion Monte Carlo ◽  
Excitation Energies ◽  
And Diffusion

DIFFUSION MONTE CARLO STUDY OF GROUND STATE PROPERTIES OF QUANTUM DOTS

2001 ◽  
Vol 15 (10n11) ◽  
pp. 1443-1446 ◽  
Author(s):  
FRANCESCO PEDERIVA
Keyword(s):  
Quantum Dots ◽  
Monte Carlo ◽  
Ground State ◽  
Monte Carlo Study ◽  
Wave Functions ◽  
Local Spin Density Approximation ◽  
Density Approximation ◽  
Diffusion Monte Carlo ◽  
Hartree Fock ◽  
Parabolic Quantum Dot

We present the results of Diffusion Monte Carlo (DMC) calculations based on accurate multiconfiguration wave functions for N electrons (N≤13) confined to a parabolic quantum dot. The density and correlation energies have been computed and compared with the predictions of local spin density approximation theory (LSDA). We also computed the addition energy a function of the number of electrons in the dot, and compared them with the results of LSDA and Hartree Fock calculations. DMC results show a behavior qualitatively closer to the result of recent capacitance experiments.

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