A linear least-squares variational recipe for the calculation of approximate energy eigenstates

Dutta, P. ; Bhattacharyya, K. ; Bhattacharyya, S. P. (1994) A linear least-squares variational recipe for the calculation of approximate energy eigenstates Chemical Physics Letters, 226 (1-2). pp. 73-81. ISSN 0009-2614

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/000926...

Related URL: http://dx.doi.org/10.1016/0009-2614(94)00713-6

Abstract

The efficacy of the energy-spread minimization technique for solving the energy-eigenvalue equation in a linear variational framework is assessed with a 3×3 matrix perturbation problem with backdoor intruders, quartic anharmonic oscillator and the He-atom problems as prototypical examples. Both direct and indirect minimization schemes are considered and disadvantages of the latter pointed out. The relative merits and demerits of the conventional, vis-a-vis stochastic minimization routes are critically analyzed in the present context.

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ID Code:2943
Deposited On:09 Oct 2010 07:22
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