First-Principles Study of a Positron Immersed in an Electron Gas
Mesoscale and Nanoscale Physics
2011-01-20 v1 Quantum Gases
Abstract
Calculations of the relaxation energy, contact pair-correlation function, and annihilating-pair momentum density for a single positron immersed in a homogeneous electron gas are presented. We achieve an accurate description of the electron-positron correlation effects by working in the reference frame in which the positron is stationary and using a mean-field approach based on single-component density functional theory. Our positron relaxation energies and annihilation rates are similar to those from the best existing many-body calculations. Our annihilating-pair momentum densities are significantly different from previous data, and include a "tail" beyond the Fermi edge.
Keywords
Cite
@article{arxiv.1002.4748,
title = {First-Principles Study of a Positron Immersed in an Electron Gas},
author = {N. D. Drummond and P. Lopez Rios and C. J. Pickard and R. J. Needs},
journal= {arXiv preprint arXiv:1002.4748},
year = {2011}
}