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Gaussian, Mean Field and Variational Approximation: the Equivalence | E. Prodan
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26 May 1999 | Subject: | quant-ph | Abstract: | We show the equivalence between the three approximation schemes for self-interacting (1+1)-D scalar field theories. Based on rigorous results of [1, 2], we are able to prove that the Gaussian approximation is very precise for certain limits of coupling constants. The $lambda phi ^{4}+sigma phi ^{2}$ model will be used as a concrete application. | Source: | arXiv, quant-ph/9905088 | Services: | Forum | Review | PDF | Favorites |
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