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A variational method from the variance of energy |
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| Authors: | F.?Siringo author-information" > author-information__contact u-icon-before" > mailto:fabio.siringo@ct.infn.it" title=" fabio.siringo@ct.infn.it" itemprop=" email" data-track=" click" data-track-action=" Email author" data-track-label=" " >Email author,L.?Marotta |
| Affiliation: | (1) Dipartimento di Fisica e Astronomia, Universitá di Catania, INFN Sez. di Catania and INFM UdR di Catania, via S. Sofia 64, 95123 Catania, Italy |
| Abstract: | 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 to the Gaussian effective potential. PACS. 03.65.-w, 11.10.-z, 05.30.-d Received: 28 June 2005, Published online: 13 September 2005 |
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