ArnHF (n = 1–4) van der Waals clusters: a quantum Monte Carlo study of ground state energies, structures and HF vibrational frequency shifts

1996 ◽  
Vol 252 (1-2) ◽  
pp. 23-32 ◽  
Author(s):  
Parhat Niyaz ◽  
Zlatko Bačić ◽  
Jules W. Moskowitz ◽  
Kevin E. Schmidt
Keyword(s):  
Monte Carlo ◽  
Ground State ◽  
Quantum Monte Carlo ◽  
Vibrational Frequency ◽  
Van Der Waals ◽  
Monte Carlo Study ◽  
Frequency Shifts ◽  
Van Der Waals Clusters ◽  
Ground State Energies ◽  
Vibrational Frequency Shifts

VARIATIONAL COMPUTATIONS FOR EXCITONS IN QUANTUM DOTS: A QUANTUM MONTE CARLO STUDY

2011 ◽  
Vol 25 (01) ◽  
pp. 119-130
Author(s):  
A. YILDIZ ◽  
S. ŞAKİROĞLU ◽  
Ü. DOĞAN ◽  
K. AKGÜNGÖR ◽  
H. EPİK ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Monte Carlo ◽  
Ground State ◽  
Quantum Monte Carlo ◽  
Three Dimensional ◽  
Monte Carlo Study ◽  
Wave Functions ◽  
Monte Carlo Techniques ◽  
Oscillator Basis ◽  
Ground State Energies

A study of variational wave functions for calculation of the ground-state energies of excitons confined in a two-dimensional (2D) disc-like and three-dimensional (3D) spherical parabolic GaAs quantum dots (QDs) is presented. We have used four variational trial wave functions constructed as the harmonic-oscillator basis multiplied by different correlation functions. The proposed correlation function formed by including linear expansion in terms of Hylleraas-like coordinates to the Jastrow factor is able to capture nearly exactly the ground-state energies of 3D excitons, and it properly account for the results of 2D excitons. Quantum Monte Carlo techniques combined with the proposed wave function are a powerful tool for studying excitons in parabolic QDs.

He2Cl2 and He3Cl2 van der Waals clusters: A quantum Monte Carlo study

1992 ◽  
Vol 97 (9) ◽  
pp. 6472-6480 ◽  
Author(s):  
Z. Bac̆ić ◽  
M. Kennedy‐Mandziuk ◽  
J. W. Moskowitz ◽  
K. E. Schmidt
Keyword(s):  
Monte Carlo ◽  
Quantum Monte Carlo ◽  
Van Der Waals ◽  
Monte Carlo Study ◽  
Van Der Waals Clusters

scholarly journals THERMODYNAMIC PROPERTIES OF A TRAPPED BOSE GAS: A DIFFUSION MONTE CARLO STUDY

2008 ◽  
Vol 22 (24) ◽  
pp. 4261-4273 ◽  
Author(s):  
S. DATTA
Keyword(s):  
Monte Carlo ◽  
Thermodynamic Properties ◽  
Temperature Variation ◽  
Quantum Monte Carlo ◽  
Chemical Potential ◽  
Monte Carlo Study ◽  
Bose Gas ◽  
Diffusion Monte Carlo ◽  
Frequency Shifts ◽  
Realistic Potential

We investigate the thermodynamic properties of a trapped Bose gas of Rb atoms interacting through a repulsive potential at low but finite temperature (kBT < μ < Tc) by Quantum Monte Carlo method based upon the generalization of Feynman-Kac method1-3 applicable to many-body systems at T=0 to finite temperatures. In this paper, we report temperature variation of condensation fraction, chemical potential, density profile, total energy of the system, release energy, frequency shifts and moment of inertia within the realistic potential model (Morse type) for the first time by diffusion Monte Carlo technique. The most remarkable success was in achieving the same trend in the temperature variation of frequency shifts as was observed in JILA4 for both m=2 and m=0 modes. For other things, we agree with the work of Giorgini et al.,5 Pitaevskii et al.6 and Krauth.7

Quantum Monte Carlo ground state energies for the singly charged ions from Li through Ar

2010 ◽  
Vol 133 (6) ◽  
pp. 064102 ◽  
Author(s):  
P. Maldonado ◽  
A. Sarsa ◽  
E. Buendía ◽  
F. J. Gálvez
Keyword(s):  
Monte Carlo ◽  
Ground State ◽  
Quantum Monte Carlo ◽  
Singly Charged ◽  
Charged Ions ◽  
Ground State Energies
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