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Quantum Monte Carlo study of a positron in an electron gas

Research output: Contribution to journalJournal article

Published

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Journal publication date8/11/2011
JournalPhysical Review Letters
Journal number20
Volume107
Number of pages5
Original languageEnglish

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.

Bibliographic note

© 2011 American Physical Society