Results 351 to 360 of about 2,466,647 (365)
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1994
Let us remind ourselves of the basic problem in Euclidean field theory, which is to give meaning to the Schwinger functions when the action ...
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Let us remind ourselves of the basic problem in Euclidean field theory, which is to give meaning to the Schwinger functions when the action ...
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Approach to equilibrium in a lattice field theory
Il Nuovo Cimento B, 1982We give further results on the approach to equilibrium of a chain of coupled nonlinear oscillators when the energy is initially fed only to the longest-wave-length modes. We show that the intrinsic time scale for numerical simulations strongly depends upon the initial conditions, increasing as the coupling constant and/or the total energy are lowered ...
MARCHESONI, Fabio, M. SPARPAGLIONE
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, 1996
We review the dynamical mean-field theory of strongly correlated electron systems which is based on a mapping of lattice models onto quantum impurity models subject to a self-consistency condition. This mapping is exact for models of correlated electrons
A. Georges +3 more
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We review the dynamical mean-field theory of strongly correlated electron systems which is based on a mapping of lattice models onto quantum impurity models subject to a self-consistency condition. This mapping is exact for models of correlated electrons
A. Georges +3 more
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Langevin simulations of lattice field theories
Physical Review D, 1985We present a new analysis of Langevin simulation techniques for lattice field theories, including a general discussion of errors and algorithm speed. We introduce Fourier techniques that greatly accelerate simulations on large lattices. We also introduce a new technique for including quark vacuum-polarization corrections that admits any number of ...
G. George Batrouni +5 more
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Lattice field theory as a percolation process
Physical Review Letters, 1988For a given lattice spin or gauge theory an associated correlated bond or plaquette percolation process is constructed. It is conjectured to reproduce the universal scaling behavior of the original model. Different field theories lead to different cluster weights generalizing a result by Fortuin and Kasteleyn for Potts models.
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Overrelaxation algorithms for lattice field theories
Physical Review D, 1988We study overrelaxation algorithms for the thermalization of lattice field theories with multiquadratic and more general actions. Overrelaxation algorithms are one-parameter generalizations of the heat-bath algorithm which satisfy the detailed-balance condition; the parameter is the relaxation parameter ..omega.., 0 ..0 (extreme underrelaxation) limit ...
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Embedding lattice field theory in continuum field theory
Physical Review D, 1980Lattice field theory is embedded in ultraviolet-finite continuum theory by transforming a finite number of continuum degrees of freedom into lattice degrees of freedom. The resulting Hamiltonian is equivalent to the continuum Hamiltonian, and consists of the lattice Hamiltonian plus corrections.
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Lattice field theory for strings
AIP Conference Proceedings Volume 68, 1980By constructing an equivalent euclidean lattice field theory, we show that a path integral for closed Nambu‐Goto strings interacting by breaking and joining is pathological.
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Novel Approach to Lattice Field Theory
Physical Review Letters, 1988A novel action-variational approach based on certain natural criteria is proposed. Its accuracy and advantages are demonstrated for U(1) gauge theory in four dimensions.
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