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Monte Carlo simulations and field transformation: the scalar case | | B. Alles
; P. Butera
; M. Della Morte
; G. Marchesini
; | | Date: |
6 Jul 1998 | | Journal: | Nucl.Phys. B538 (1999) 235-248 | | Subject: | hep-lat | | Abstract: | We describe a new method in lattice field theory to compute observables at various values of the parameters lambda_i in the action S[phi,lambda_i]. Firstly one performs a single simulation of a ``reference action’’ S[phi^r, lambda_i^r] with fixed lambda_i^r. Then the phi^r-configurations are transformed into those of a field phi distributed according to S[phi,lambda_i], apart from a ``remainder action’’ which enters as a reak weight. In this way we measure the observables at values of lambda_i different from lambda_i^r. We study the performance of the algorithm in the case of the simplest renormalizable model, namely the phi^4 scalar theory on a four dimensional lattice and compare the method with the ``histogram’’ technique of which it is a generalization. | | Source: | arXiv, hep-lat/9807007 | | Services: | Forum | Review | PDF | Favorites | |
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