ar X iv : h ep - p h / 05 06 28 4 v 1 2 8 Ju n 20 05 A variational method from the variance of energy
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چکیده
A variational method is studied based on the minimum of energy variance. The method is tested on exactly soluble problems in quantum mechanics, and is shown to be a useful tool whenever the properties of states are more relevant than the eigenvalues. In quantum field theory the method provides a consistent second order extension of the gaussian effective potential. Typeset using REVTEX
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تاریخ انتشار 2005