Results 181 to 190 of about 704,837 (230)

On a model of quantum field theory

Proceedings of the Steklov Institute of Mathematics, 2014
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Aref'eva, I. Ya., Volovich, I. V.
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Two-Dimensional Integrable Models in Quantum Field Theory

Physica Scripta, 1981
Summary: We review recent work on the quantization of a wide spectrum of completely integrable two-dimensional field theories.
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A nonperturbative stability theory of quantum field theory models

Annals of Physics, 1985
A nonperturbative method of analysis of the stability problem of quantum field theory models is proposed. The method consists in the systematic analysis of the functional dependence on boson field B of the effective boson Lagrangian S/sup eff/(B) consisting of the fermion term S/sup F//sub 1/(B), constraint term S/sup F//sup P//sub 1/(B) and the boson ...
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Mechanical Model for Quantum Field Theory

Journal of Mathematical Physics, 1963
We consider two harmonic oscillators, coupled during a finite time. Initial and final states can be defined unambiguously, and if the duration of the coupling is sufficiently short, the S matrix can be computed explicitly. The coupling gx2y is investigated in detail, for complex values of g.
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Nonlinear model in quantum field theory

Acta Physica Academiae Scientiarum Hungaricae, 1968
The mass spectrum of a nonlinear real scalar field was sought for using Ritz’s variational method. In the case of suitable renormalization 1, 2 or 3 finite values of rest mass were found. The different types of these excitations belong to different inequivalent representations of the field operators.
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Quantum spin model for Reggeon field theory

Physical Review D, 1977
We study the Hamiltonian form of Reggeon field theory on a lattice in the two-dimensional (D = 2) transverse or impact-parameter space. The Hamiltonian formalism allows naturally for the privileged character of the longitudinal variable or rapidity, which is kept continuous.
Richard C. Brower, Miguel A. Furman, Krishnappa Subbarao   +2 more
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Renormalization of a model quantum field theory

American Journal of Physics, 1992
Renormalization is the technique used to eliminate infinities that arise in quantum field theory. This paper shows how to renormalize a particularly simple model, in which a single mass counterterm of second order in the coupling constant suffices to cancel all divergences.
Per Kraus, David J. Griffiths
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Modular Group Representations and Fusion in Logarithmic Conformal Field Theories and in the Quantum Group Center

, 2005
The SL(2, ℤ)-representation π on the center of the restricted quantum group at the primitive 2pth root of unity is shown to be equivalent to the SL(2, ℤ)-representation on the extended characters of the logarithmic (1, p) conformal field theory model ...
B. Feigin, A. Gainutdinov, A. Semikhatov, I. Tipunin   +3 more
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Asymptotic behaviour in model quantum field theory

Il Nuovo Cimento A, 1977
A solvable field-theoretical model is examined with respect to its asymptotic behaviour in strong coupling. The model entails the interaction via Yukawa coupling of a regularized fermion field with a boson field which is spurious,i.e. a boson carrying neither momentum nor energy.
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Model Hamiltonians for Local Quantum Field Theory

Physical Review, 1965
We study the problem of renormalization for the interaction of a charged scalar meson field with a fixed two-level point source. Our especial interest is coupling-constant renormalization. We study in particular the problem of obtaining eigenstates and eigenvalues of the Hamiltonian for the fixed-source theory.
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