N-Stoffwechsel

Kessler, Erich; Kating, Horst

doi:10.1007/978-3-642-94844-2_21

Progress in Botany

1962

DOI: 10.1007/978-3-642-94844-2_21

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N-Stoffwechsel

Erich Kessler¹,

Horst Kating²

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2003

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“…The effect of this term is at the same time to reduce the contributions of the large fields and to reduce the argument of the exponential which is expanded. Simple power law relations appear [8] in the strong and weak coupling limits for the problem of the one dimensional integral [6].…”

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confidence: 99%

A study of large field configurations in MC simulations

Meurice

2003

Nuclear Physics B - Proceedings Supplements

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We discuss a new approach of scalar field theory where the small field contributions are treated perturbatively and the large field configurations (which are responsible for the asymptotic behavior of the perturbative series) are neglected. In two Borel summable lambda phi ^4 problems improved perturbative series can be obtained by this procedure. The modified series converge towards values exponentially close to the exact ones. For lambda larger than some critical value, the method outperforms Pade approximants and Borel summations. The method can also be used for series which are not Borel summable such as the double-well potential series and provide a perturbative approach of the instanton contribution. Semi-classical methods can be used to calculate the modified Feynman rules, estimate the error and optimize the field cutoff. We discuss Monte Carlo simulations in one and two dimensions which support the hypothesis of dilution of large field configurations used in these semi-classical calculations. We show that Monte Carlo methods can be used to calculate the modified perturbative series.Comment: 3 pages, lattice2002(spin

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confidence: 99%

A study of large field configurations in MC simulations

Meurice

2003

Nuclear Physics B - Proceedings Supplements

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N-Stoffwechsel

Cited by 1 publication

References 215 publications

A study of large field configurations in MC simulations

A study of large field configurations in MC simulations

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