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Article Dans Une Revue Physical Review Letters Année : 2023

Static self energy and effective mass of the homogeneous electron gas from Quantum Monte Carlo calculations

Résumé

We discuss the methodology of quantum Monte Carlo calculations of the effective mass based on the static self energy, Σ(k,0)Σ(k,0)\Sigma(k,0). We then use variational Monte Carlo calculations of Σ(k,0)Σ(k,0)\Sigma(k,0) of the homogeneous electron gas at various densities to obtain results very close to perturbative G0W0G0W0G_0 W_0 calculations for values of the density parameter 1≤rs≤101≤rs≤101 \le r_s \le 10. The obtained values for the effective mass are close to diagrammatic Monte Carlo results and disagree with previous quantum Monte Carlo calculations based on a heuristic mapping of excitation energies to those of an ideal gas.
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Dates et versions

hal-04234537 , version 1 (10-10-2023)

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Markus Holzmann, Francesco Calcavecchia, David M. Ceperley, Valerio Olevano. Static self energy and effective mass of the homogeneous electron gas from Quantum Monte Carlo calculations. Physical Review Letters, 2023, 131 (18), pp.186501. ⟨10.1103/PhysRevLett.131.186501⟩. ⟨hal-04234537⟩
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