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Paper detail

Quantum Monte Carlo Study of a Positron in an Electron Gas

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.

preprint2011arXivOpen access
N. D. DrummondP. Lopez RiosC. J. PickardR. J. Needs
cond-mat.stat-mech
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N. D. DrummondP. Lopez RiosC. J. PickardR. J. Needs

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