Stability of light positronic atoms: Quantum Monte Carlo studies
نویسندگان
چکیده
منابع مشابه
Stability of light positronic atoms: Quantum Monte Carlo studies.
We present accurate ground-state energies for the positronium atom in a Coulomb field of point charge Z (XPs!, for the positronium hydrogen ~HPs! and positronium lithium ~LiPs! atoms. Calculations are done using the diffusion quantum Monte Carlo ~DQMC! method. For XPs, the critical value of Z for binding is examined. While HPs is stable, the results show that LiPs is unstable against dissociati...
متن کاملQuantum Monte Carlo Studies of Relativistic Effects in Light Nuclei
Relativistic Hamiltonians are defined as the sum of relativistic one-body kinetic energy, twoand three-body potentials and their boost corrections. In this work we use the variational Monte Carlo method to study two kinds of relativistic effects in the binding energy of 3H and 4He. The first is due to the nonlocalities in the relativistic kinetic energy and relativistic one-pion exchange potent...
متن کاملQuantum Monte Carlo Calculations of Light Nuclei
The goal of ab-initio light-nuclei calculations is to understand nuclei as collections of nucleons interacting with realistic (bare) potentials through reliable solutions of the many-nucleon Schrödinger equation. Such calculations can study binding energies, excitation spectra, relative stability, densities, transition amplitudes, cluster-cluster overlaps, low-energy astrophysical reactions, an...
متن کاملQuantum Monte Carlo Calculations for Light Nuclei
Quantum Monte Carlo calculationsof ground and low-lying excited states for nuclei with A 8 are made using a realistic Hamiltonian that ts NN scattering data. Results for more than 40 diierent (J ; T) states, plus isobaric analogs, are obtained and the known excitation spectra are reproduced reasonably well. Various density and momentum distributions and electromagnetic form factors and moments ...
متن کاملQuantum Monte Carlo Studies of Correlated Systems
c © 2003 by John von Neumann Institute for Computing Permission to make digital or hard copies of portions of this work for personal or classroom use is granted provided that the copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise requires prior specific permission by the publisher ment...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 1996
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.54.4849