• Corpus ID: 117717834

Variational methods, multiprecision and nonrelativistic energies

  title={Variational methods, multiprecision and nonrelativistic energies},
  author={Vladimir I. Korobov},
  journal={arXiv: Atomic Physics},
  • V. Korobov
  • Published 28 December 1999
  • Mathematics
  • arXiv: Atomic Physics
It is known that the variational methods are the most powerful tool for studying the Coulomb three-body bound state problem. However, they often suffer from loss of stability when the number of basis functions increases. This problem can be cured by applying the multiprecision package designed by D.H. Bailey. We consider the variational basis functions of the type exp(-a_n r_1 - b_n r_2 - g_n r_12) with complex exponents. The method yields the best available energies for the ground states of… 

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