Virginia TechMancini, Jay D.Massano, William J.Potter, Charles D.Bowen, Samuel P.2014-05-072014-05-071988-09Mancini, J. D.; Massano, W. J.; Potter, C. D.; Bowen, S. P., "Analytic approximation to the ground-state energy of the Anderson model," Phys. Rev. B 38, 5047 DOI: http://dx.doi.org/10.1103/PhysRevB.38.50470163-1829http://hdl.handle.net/10919/47810Using the nonperturbative Lanczos recursion scheme an analytic approximation to the ground-state energy of the single-impurity Anderson model is obtained. Calculations are carried out to a 5x5 matrix truncation. Comparisons are made with the exact Bethe-ansatz result.en-USIn Copyrightphysicscondensed matterArticle - Refereedhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.38.5047https://doi.org/10.1103/PhysRevB.38.5047