Correlation effects in positron-electron systems: A Quantum Monte-Carlo study |
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| Authors: | A. Harju B. Barbiellini S. Siljamäki R. M. Nieminen G. Ortiz |
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| Affiliation: | (1) Laboratory of Physics, Helsinki University of Technology, FIN-02150 Espoo, (Finland);(2) Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, 61801 Urbana, IL, (USA) |
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| Abstract: | We present Quantum Monte-Carlo results for various positron-electron systems. We discuss the energetics of the bound state of a positronium (Ps) with finite atomic systems: a massive point charge Z, hydrogen (H) and lithium (Li). We also analyze the screening cloud around the positron in the positronium hydride (HPs) and in the homogeneous electron gas in order to determine the positron annihilation rates. |
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