Quantum Monte Carlo study of a positron in an electron gas

Drummond, Neil and Lopez Rios, P. and Needs, R. J. and Pickard, C. J. (2011) Quantum Monte Carlo study of a positron in an electron gas. Physical review letters, 107 (20). ISSN 1079-7114

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Abstract

Quantum Monte Carlo calculations of the relaxation energy, pair-correlation function, and annihilating-pair momentum density are presented for a positron immersed in a homogeneous electron gas. We find smaller relaxation energies and contact pair-correlation functions in the important low-density regime than predicted by earlier studies. Our annihilating-pair momentum densities have almost zero weight above the Fermi momentum due to the cancellation of electron-electron and electron-positron correlation effects.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2011 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/aacsb/disciplinebasedresearch
Subjects:
ID Code:
52369
Deposited By:
Deposited On:
23 Jan 2012 09:58
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2020 03:20